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Publications

Books and Book Chapters:

  1. T. M. Chin, M. R. Luettgen, W. C. Karl, and A. S. Willsky, ``An  Estimation-Theoretic Perspective on Image Processing and the  Calculation of Optical Flow," in Motion Analysis and Image    Sequence Processing , M. Sezan and R. Lagendijk, eds, Kluwer, March  1993.
  2. W. C. Karl, ``Regularization in Reconstruction and Restoration,"  in Handbook of Image and Video Processing , A. Bovik, ed, Academic Press Limited, April, 2000. W. C. Karl, ``Regularization in Reconstruction and Restoration,” in   Handbook of Image and Video Processing , A. Bovik, ed, Academic Press Limited, Second Edition, In progress, 2003.
  3. W. C. Karl, "Regularization in Reconstruction and Restoration,” in Handbook of Image and Video Processing, A. Bovik, ed, Academic Press Limited, Second Edition, May 2005.
  4. R. A. Weisenseel, W. C. Karl, and R. C. Chan, "Multisensor Data Inversion and Fusion Based on Shared Image Structure,” in Multi-sensor image fusion and its applications, R. S. Blum and Z. Liu, ed, CRC Press, 2005.
  5. W. C. Karl and E. L. Miller, "Digital Subsurfacing Imaging,” in Introduction to Subsurface Imaging,” B. Saleh, ed, Cambridge University Press, December, 2010
  6. I. Stojanovic, M. Cetin, W. C. Karl, “Sparsity and Compressed Sensing in Mono-static and Multi-static Radar Imaging,” in Filtering from Undersampled Data with an Introduction to Compressed Sensing, A. Y. Carmi , L. S. Mihaylova and S. J. Godsill, eds, Springer, September, 2013.

Journal Publications:

  1. W. C. Karl, J. Greschak, and G. C. Verghese, ``Comments on `A  Necessary and Sufficient Condition for the Stability of Discrete  Linear Interval Systems,' "  International Journal of Control ,  Vol. 39, No. 4, pp. 849-851, 1984
  2. W. C. Karl and G. C. Verghese, ``Comments on `Sufficient and Necessary Condition for the Asymptotic Stability of Discrete Linear  Interval systems,' "  International Journal of Control , Vol.  45, No. 5, pp. 2159-2160, November, 1988.
  3. W. C. Karl and G. C. Verghese, ``Comments on `Robust Stability in  Linear State Space Models,' "   International Journal of Control , Vol. 49, No. 3, pp. 1093, 1989.
  4. W. C. Karl and G. C. Verghese, ``Curvatures of Surfaces and Their Shadows,"  Linear Algebra and its Applications (Special Issue on Image Reconstruction from Projections), Vol. 130, pp. 231-255, March, 1990.
  5. W. C. Karl, S. Leeb, L. Jones, J. Kirtley, and G. C. Verghese, ``Applications of Rank-Based Filters in Power Electronics,"   IEEE Transactions on Power Electronics , Vol. 7, No. 3, pp. 437-443, July 1992.
  6. T. M. Chin, W. C. Karl, and A. S. Willsky, ``Sequential Filtering  for Multi-Frame Visual Reconstruction,"   Signal Processing   special issue on Multidimensional Signal Processing, Vol. 28, No. 3,  pp. 311-333, September 1992.
  7. W. C. Karl and G. C. Verghese, ``A Sufficient Condition for the Stability of Interval Matrix Polynomials,"  IEEE Transactions on Automatic Control  (Special Issue on Meeting the Challenge of Computer Science in the Industrial Applications of Control), Vol. 38,  No. 7, pp. 1139-1143, July 1993.
  8. M. R. Luettgen, W. C. Karl, A. S. Willsky, and R. R. Tenney, ``Multiscale Representations of Markov Random Fields,"   IEEE  Transactions on Signal Processing special issue on Wavelets and Signal Processing, Vol. 41, No. 12, pp. 3377-3396, December 1993.
  9. W. C. Karl, G. C. Verghese, and J. H. Lang, ``Control of Vibrational Systems,"  IEEE Transactions on Automatic Control ,  Vol. 39, No. 1, pp. 222-226, January, 1994.
  10. M. R. Luettgen, W. C. Karl, and A. S. Willsky, ``Efficient Multiscale Regularization with Applications to the Computation of Optical Flow,"   IEEE Transactions on Image Processing , Vol. 3, No. 1, pp. 41-64, January 1994.
  11. W. C. Karl, G. C. Verghese, and A. S. Willsky, ``Reconstructing  Ellipsoids from Projections,"   Computer Vision, Graphics, and Image Processing: Graphical Models and Image Processing , Vol. 56, No. 2, pp. 124-139, March, 1994.
  12. P. Milanfar, W. C. Karl, and A. S. Willsky, ``Reconstructing Binary Polygonal Objects from Projections: A Statistical View,"  Computer Vision, Graphics, and Image Processing: Graphical Models and Image Processing, Vol. 56, No. 5, pp. 371-391, September,1994.
  13. T. M. Chin, W. C. Karl, and A. S. Willsky, ``Probabilistic and Sequential Computation of Optical Flow using Temporal Coherence,"IEEE Transactions on Image Processing, Vol. 3, No. 6, pp. 773-788, November, 1994.
  14. T. M. Chin, W. C. Karl, and A. S. Willsky, ``A Distributed and Iterative Method for Square Root Filtering in Space-Time Estimation,"Automatica, Vol. 31, No. 1, pp. 67-82, January, 1995.
  15. P. Milanfar, G. C. Verghese, W. C. Karl, and A. S. Willsky,``Reconstructing Polygons from Moments with Connections to Array Processing," IEEE Transactions on Signal Processing, Vol. 43,No. 2, pp. 432-443, February, 1995.
  16. P. W. Fieguth, W. C. Karl, A. S. Willsky, and C. Wunsch,``Multiresolution Optimal Interpolation and Statistical Analysis of TOPEX/POSEIDON Satellite Altimetry," IEEE Transactions on  Geoscience and Remote Sensing, Vol. 33, No. 2, pp. 280-292,March, 1995.
  17. S. Jaggi, W. C. Karl, and A. S. Willsky, ``Estimation of Dynamically Evolving Ellipsoids with Applications to Medical Imaging," IEEE Transactions on Medical Imaging, Vol. 14,No. 2, pp. 249-258, June, 1995.
  18. M. Bhatia, W. C. Karl, and A. S. Willsky, A Wavelet-Based Method for Multiscale Tomographic Reconstruction," IEEE Transactions on  Medical Imaging, Vol. 15, No. 1, pp. 92-101, February, 1996.
  19. R. W. Stadler, W. C. Karl, and R. S. Lees, ``New Methods for Arterial Diameter Measurement from B-Mode Images," Ultrasound  in Medicine and Biology, Vol. 22, No. 1, pp. 25-34, 1996.
  20. R. W. Stadler, W. C. Karl, and R. S. Lees, ``The Application of Echo Tracking Methods to Endothelium-Dependent Vasoreactivity and Arterial Compliance Measurements," Ultrasound in Medicine and Biology, Vol. 22: No. 1, pp. 35-42, 1996.
  21. P. Milanfar, W. C. Karl, and A. S. Willsky, ``A Moment-Based Variational Approach to Tomographic Reconstruction," IEEE  Transactions on Image Processing, Vol. 5, No. 3, pp. 459-470,March, 1996.
  22. W. C. Karl, S. R. Kulkarni, G. C. Verghese, andA. S. Willsky, ``Local Tests for Consistency of Support HyperplaneData," Journal of Mathematical Imaging and Vision special issueon Topology and Geometry in Computer Vision, Vol. 6, No. 2/3,Pg. 249-267, June, 1996.
  23. L. Belcastro, W. C. Karl, and A. S. Willsky, ``Tomographic Reconstruction of Polygons from Knot Location and Chord Length Measurements," Graphical Models and Image Processing, Vol. 58, No. 3,pp. 233-245, May, 1996.
  24. C. H. Fosgate, H. Krim, W. W. Irving, W. C. Karl, A. S. Willsky,``Multiscale Segmentation and Anomaly Enhancement of SAR Imagery," IEEE Transactions on Image Processing special issue on AutomaticTarget Recognition, Vol. 6, No. 1, pp. 7-20, January, 1997.
  25. M. Bhatia, W. C. Karl, and A. S. Willsky, ``Tomographic Reconstruction and Estimation Based on Multiscale Natural-Pixel Bases," IEEE Transactions on Image Processing, Vol 6, No. 3,pp. 463-478, March 1997.
  26. J. Kaufhold, M. K. Schneider, W. C. Karl, and A. S. Willsky, ``A statistical method for efficient segmentation of MR imagery," International Journal of Pattern Recognition and Artificial  Intelligence Special issue on Processing of MRI Imagery, Vol. 11,No. 8, pg. 1213-1231, December, 1997.
  27. W. C. Karl, D. N. Kennedy, A. J. Worth, H. H. Pien, A. S. Willsky,``Processing of MR Images of the Human Brain," International  Journal of Pattern Recognition and Artificial Intelligence Specialissue on Processing of MRI Imagery, Vol. 11, No. 8, pg. 1157-1160,December, 1997.
  28. P. W. Fieguth, W. C. Karl, and, A. S. Willsky, ``Efficient Multiresolution Counterparts to Variational Methods for SurfaceReconstruction," Computer Vision and Image Understanding,Vol. 70, No. 2, pg 157-176, May, 1998.
  29. A. Frakt, W. C. Karl, and A. S. Willsky, ``A Multiscale Hypothesis Testing Approach to Anomaly Detection and Localization from Noisy Tomographic Data," IEEE Transactions on ImageProcessing, Vol. 7, No. 6, pg 825-837, June, 1998.
  30. J. Kaufhold, W. C. Karl, and R. C. Chan, ``A Texture-Based Variational Segmentation Method for Ultrasound Blood Vessel Imagery," Annals of Biomedical Engineering.  Volume 26, Supplement 1,October, 1998.
  31. S. Jaggi, W. C. Karl, S. Mallat, and A. S. Willsky, ``HighResolution Pursuit for Feature Extraction," Applied Computational and Harmonic Analysis, Vol. 5, No. 4, pg 428-449,October, 1998.
  32. F. Kamalabadi, W. C. Karl, J. L. Semeter, D. M.  Cotton, T. A.Cook, S. Chakrabarti, ``A Statistical framework for space-based EUV ionospheric tomography," Radio Science, Vol. 34, No. 2,pp. 437-447, March/April, 1999.
  33. S. Jaggi, W. C. Karl, S. G. Mallat, and A. S. Willsky,``Silhouette Recognition using High Resolution Pursuit," Pattern Recognition, Vol. 23, No. 5., pg. 753-771, May, 1999.
  34. M. K. Schneider, P. W. Fieguth, W. C. Karl, and A. S. Willsky,``Multiscale Statistical Methods for the Segmentation andReconstruction of Signals and Images," IEEE Transactions on  Image Processing, Vol. 9, No. 3, Pg. 456-468, March, 2000.
  35. A. Kannan, M. Ostendorf, W. C. Karl, D. A. Castanon, R. K. Fish,``ML Parameter Estimation of a Multiscale Stochastic Process using theEM Algorithm," IEEE Transactions on SignalProcessing, Vol. 48, No. 6 pg. 1836-1847, June, 2000.
  36. R. Chan, W. C. Karl, and R. S. Lees, ``A new model-based techniquefor enhanced small vessel measurements in X-ray cine-angiograms,"IEEE Transactions on Medical Imaging, Vol. 19, No. 3, pg.243-255, March, 2000.
  37. M. Cetin and W. C. Karl, ``Feature-enhanced synthetic apertureradar image formation based on non-quadratic regularization,"IEEE Transactions on Image Processing, Vol. 10, No. 4,pg. 623-631, April, 2001.
  38. W. S. Hoge, E. L. Miller, H. Lev-Ari, D. H. Brooks, W. C. Karland L. P. Panych, ``An Efficient Region of Interest AcquisitionMethod for Dynamic Magnetic Resonance Imaging," IEEE Transactions on Image Processing, Vol. 10, No. 74, pg.1118-1128, July 2001.
  39. M. Desai, R. Mangoubi, J. Shah, W. Karl, H. Pien, A. Worth , andD. Kennedy, ``Functional MRI Activity Characterization Using ResponseTime Shift Estimates from Curve Evolution," IEEE Transactionson Image Processing, Vol. 21, No. 11, pg. 1402-1412, November 2002.
  40. V. Galdi, H. Feng, D. A. Castanon, W. C. Karl, L. B. Felsen,``Multifrequency Subsurface Sensing in the Presence of a ModeratelyRough Air-Soil Interface via Quasi-Ray Gaussian Beams," Radio  Science, Vol. 38, No. 2, VIC 8-1-VIC 8-12, December 2002.
  41. H. Feng, W. C. Karl, D. A. Castanon, ``A Curve Evolution Approach to Object-Based Tomographic Reconstruction" IEEE Transactions on Image Processing, Vol. 12, No. 1, pg, 44-57, January 2003.
  42. V. Galdi, J. Pavlovich, W. C. Karl, D. A. Castanon, L. B.  Felsen,``Moderately Rough Dielectric Interface Profile Reconstruction viaShort-Pulse Quasi-Ray Gaussian Beams," IEEE Transactions on  Antennas and Propagation, Vol. 51, No. 3, pg. 672-677, March, 2003.
  43. V. Galdi, H. Feng, D. A. Castanon, W. C. Karl, L. B. Felsen,``Moderately Rough Surface Underground Imaging via Short-PulseQuasi-Ray Gaussian Beams," IEEE Transactions on Antennas and Propagation, Vol. 51, No. 9, pg. 2304-2318, Sept. 2003.
  44. M. Cetin, W. C. Karl, and D. A. Castanon, ``Analysis of the Impactof Non-Quadratic Optimization-based SAR Imaging on Feature Enhancementand ATR Performance," IEEE Trans. Aerospace and Electronic Systems,Vol. 39, No. 4, pg. 1375-1395, October 2003.
  45. R. Weisenseel and W. C. Karl, R. C. Chan, and T. J. Brady, ``AVariational Approach to Multi-modality Subsurface Data Inversion andFusion Based on Shared Image Structure," Subsurface SensingTechnologies and Applications, Vol.4, No.4, pgs 373-392, October 2003.
  46. A. K. Swan, L. Moiseev, C. R. Cantor, B. Davis, S. B. Ippolito, W.C. Karl, B. B. Goldberg and M. S. Unlu, ``Towards nanometer-scaleresolution in fluorescence microscopy using spectralself-interference," IEEE Journal on selected topics  in quantum electronics (JSTQE) special issue on ``Lasers inmedicine and biology," Vol. 9, No. 2, pgs 294-300, March/April 2003.
  47. B. J. Davis, W. C. Karl, A. K. Swan, M. S. Unlu, and B. B. Goldberg, ``Capabilities and limitations of pupil-plane filters for superresolution and image enhancement," Opt. Express Vol. 12,  No. 17, 4150-4156, August, 2004.
  48. Chan, R.C., A.H. Chau, W.C.  Karl, S. Nadkarni, A.S. Khalil, N. Iftimia, M. Shishkov, G.J. Tearney, M.R. Kaazempur-Mofrad, and B.E. Bouma, ``OCT-based arterial elastography: robust estimation exploiting tissue biomechanics". Optics Express, 2004.  12(19): p. 4558-4572.
  49. W. C. Karl and H. Pien, ``High-Resolution Biosensor Spectral Peak Shift Estimation," IEEE Trans. on Signal Processing, Vol. No. 12, pg 4631-4639, Dec, 2005.
  50. Maros Ferencik, Jennifer B. Lisauskas, Ricardo C. Cury, Udo Hoffmann, Suhny Abbara, Stephan Achenbach, W. Clem Karl, Thomas J. Brady, Raymond C. Chan, ``Improved vessel morphology measurements in contrast-enhanced multi-detector computed tomography coronary angiography with non-linear post-processing," European Journal of Radiology, Vol. 57, pg. 380-383, March, 2006.
  51. N. Aggarwal, and W. C. Karl, ``Line Detection in Images through Regularized Hough Transform," IEEE Transactions on Image Processing, Vol. 15, No. 3, pg. 582-591, March, 2006.
  52. M. Mendillo, S. Laurent, J. Wilson, J. Baumgardner, J. Konrad, and W. C. Karl, ``The sources of sodium escaping from Io revealed by spectral high definition imaging," Nature, Vol. 448, pg. 330-332, July 2007.
  53. B. J. Davis, A. K. Swan, M. S. Unlu, W. C. Karl, B. B. Goldberg, J. C. Schotland, and P. S. Carney, ``Spectral self-interference microscopy for low-signal nanoscale axial imaging," J. Opt. Soc. Am. A 24, pg. 3587-3599, 2007.
  54. B. J. Davis, M. Dogan, B. B. Goldberg, W. C. Karl, M. S. Unlu, and A.  K. Swan, ``4Pi spectral self-interference microscopy," J. Opt. Soc.  Am. A, 24, pg. 3762-3771, 2007.
  55. B. J. Davis, M. Dogan, B. B. Goldberg, W. C. Karl, M. S. Unlu, and A.  K. Swan, ``4Pi spectral self-interference microscopy," Virtual Journal of Nanoscale Science and Technology, Jan, 14, 2008.
  56. H. Feng, D. A. Castanon, W. C. Karl, ``Unified Anomaly Suppression and Boundary Extraction in Laser Radar Range Imagery based on a Joint Curve-Evolution and Expectation-Maximization Algorithm," IEEE Trans. Image Processing, Vol 17, No. 5, pg 757-766, May 2008.
  57. Y. Shi and W. C. Karl, ``A Real-Time Algorithm For The Approximation Of Level-Set-Based Curve Evolution," IEEE Trans. on Image Processing, Vol. 17, No. 5, Pg 645-656, May, 2008.
  58. I. Stojanovic and W. C. Karl, "Imaging of moving targets with multistatic SAR using an overcomplete dictionary,” Journal of Selected Topics in Signal Processing, special issue on MIMO Radar, Vol. 4, No. 1, Pg. 164-176, February 2010.
  59. L. He, B. Orten, S. Do, W. C. Karl, A. Kambadakone, D. Sahani, H. Pien, "A Spatio-Temporal Deconvolution Method to Improve Perfusion CT Quantification,”, IEEE Trans. on Medical Imaging, Vol. 29, No. 5, Pg. 1182-1191, May 2010.
  60. B. Orten, W. C. Karl, H. Pien, "A Survey of Tracer Kinetic Methods for Perfusion CT: A Unifying Framework,” Medical Image Analysis, in review.
  61. S. Do, Z. Liang,W. C. Karl, T. Brady, H. Pien, " A decomposition-based CT reconstruction formulation for reducing blooming artifacts,” Physics in Medicine and Biology, Vol. 56, No. 22, Pg 7109, 2011
  62. A. Tuysuzoglu, J. M. Kracht, M. Cetin, R. Cleveland, W.C. Karl, "Sparsity Driven Ultrasound Imaging,” Journal of Acoustical Society of America, Vol. 131, No. 2, Feb. 2012.
  63. .A. Reddington, J. T. Trueb, D. S. Freeman, A, Tuysuzoglu, G. G. Daaboul, C. A. Lopex, W. C. Karl, J. H. Connor, H. Fawcett, M. S. Unlu, “Point of Care Instrument for Viral Diagnostics,”, submitted to IEEE Trans.on Biomedical Engineering, Special Issue on Point of Care Technologies, Feb. 2013.
  64. I. Stojanovic, W. C. Karl, L. Novak, “Interrupted SAR persistent surveillance via group sparse reconstruction of multi-pass data,” In revision for IEEE Trans. on Aerospace and Electronic Systems, Special Issue on Compressed Sensing for Radar.
  65. I. Stojanovic, M. Cetin, W. C. Karl, “Compressed Sensing of Monostatic and Multistatic SAR,” in revision for IEEE Trans on Geoscience and Remote Sensing Letters, Feb 2013.
  66. A. Tuysuzoglu, W. C. Karl, and D. A. Castanon, “Graph-cut methods for tomographic inverse problems,” in preparation for submission to IEEE Trans. on Image Processing, Feb. 2013.

Conference Papers

  1. W. C. Karl, S. Leeb, L. Jones, J. Kirtley, and G. C. Verghese,``Applications of a Class of Nonlinear Filters to Problems in PowerElectronics," Proc. of 21st Annual IEEE Power Electronics SpecialistsConference, San Antonio, TX, pp. 35-42, June 1990.
  2. A. B. Dobrzeniecki, W. C. Karl, P. Lipson, and J. D. Pearlman,M.D., ``Advances in Quantification, Analysis, and Display of ThalliumMyocardial Images," Proc. of the 18th Annual Conf. on Computers inCardiology, Venice, Italy, pp. 497-500, September 23-26, 1991.
  3. P. Milanfar, W. C. Karl, S. R. Kulkarni, and A. S. Willsky,``Geometric Aspects of Tomographic Signal Processing," Proc. 7thIEEE Workshop on Multidimensional Signal Processing, Lake Placid, NY,pp. 6.5, Sept. 1991.
  4. P. Milanfar, W. C. Karl, and A. S. Willsky, ``StatisticalApproaches to the Tomographic Reconstruction of Finitely Parameterized Geometric Objects," in Neural and Stochastic Methods in Image and Signal Processing, S. S. Chen, Editor, Proc. SPIE1992 Int'l. Symposium on Optics, Imaging, and Instrumentation SanDiego, CA, Vol. 1766, pp. 166-177, July 20-23, 1992.
  5. R. E. Learned, W. C. Karl, and A. S. Willsky, ``Wavelet Packet Based Transient Signal Classification," Proc. IEEE Signal ProcessingSociety Int'l Symposium on Time-Frequency and Time-Scale Analysis,Victoria, Canada, pp. 109-112, October 4-6, 1992.
  6. M. R. Luettgen, W. C. Karl, and A. S. Willsky, R. R. Tenney,``Multiresolution Statistical Methods in Image Analysis," in Intelligent Robots and Computer Vision XI: Biological, Neural Net, and 3-D Methods, Proc. SPIE, Boston, MA, Vol. 1826, pp. 2-13,November 18-20, 1992.
  7. S. Jaggi, W. C. Karl, and A. S. Willsky, ``Dynamic Estimation of Left-Ventricular Ejection Fraction," in Biomedical Image Processing and Biomedical Visualization, R. S. Acharya andD. B. Goldgof, Eds., Proc. IS\&T/SPIE Symposium on Electronic ImagingScience and Technology, San Jose, CA, Vol. 1905, pp. 206-217, January1993.
  8. T. M. Chin, W. C. Karl, A. C. Mariano, and A. S. Willsky, ``SquareRoot Filtering in Time-Sequential Estimation of Random Fields," inImage and Video Processing, Proc. 1993 IS\&T/SPIE Symposium onElectronic Imaging Science and Technology, San Jose, CA, Vol. 1903,pp. 51-58, February 3-4, 1993.
  9. P. Milanfar, W. C. Karl, and A. S. Willsky, ``A GeometricFramework for Tomographic Reconstruction," Proc. of the 27th AnnualConf. on Information Science and Systems, Johns Hopkins University,Baltimore, MD, pp. 223-228, March 1993.
  10. M. R. Luettgen, W. C. Karl, A. S. Willsky, and R. Tenney,``Multiscale Representations of Markov Random Fields, withApplications to Texture Labeling," Proc. 1993 IEEE Int'l Conf. onAcoustics, Speech, and Signal Processing, Minneapolis, MN, Vol. 5,pp. 41-44, April 27-30, 1993.
  11. M. Bhatia, W. C. Karl, and A. S. Willsky, A Multiscale Method forTomographic Reconstruction," in Mathematical Imaging: Wavelet Applications in Signal and Image Processing, A. F. Laine,Ed., Proc. SPIE 1993 Int'l. Symposium on Optics, Imaging, andInstrumentation, San Diego, CA, Vol. 2034, pp. 58-69, July 1993.
  12. P. Milanfar, M. Bhatia, L. A. Belcastro, S. Jaggi, W. C. Karl, andA. S. Willsky, ``Geometric and Multiresolution Statistical Methods forReconstruction from Projections," Proc. 8th IEEE Workshop on Imageand Multidimensional Signal Processing, Cannes, France, pp. 158-159,Sept. 1993.
  13. W. W. Irving, M. M. Daniel, P. W. Fieguth, W. C. Karl, andA. S. Willsky, ``Efficient Algorithms for Gauss-Markov Random Fields," Proc. 8th IEEE Workshop on Image and MultidimensionalSignal Processing, Cannes, France, pp. 160-161, Sept. 1993.
  14. M. R. Luettgen, W. C. Karl, and A. S. Willsky, ``Fractal Regularization using Multiscale Stochastic Models," in Progress  in Wavelet Analysis and Applications, Eds. Y. Meyer and S. Roques,Editions Frontieres, Gif-sur-Yvette Cedex France, pp. 361-368, 1993.
  15. R. E. Learned, H. Krim, B. Claus, A. S. Willsky, and W. C. Karl,``Wavelet-Packet-Based Multiple-Access Communication," in Wavelet Applications in Signal and Image Processing II, A. Laineand M.  Unser, Eds., Proc. SPIE 1994 Int'l. Symposium on Optics,Imaging, and Instrumentation, San Diego, CA, Vol. 2303, pp. 246-259, July 24-29, 1994.
  16. P. W. Fieguth, W. C. Karl, and A. S. Willsky, ``A Statistical Multiscale Approach to Mapping Altimetric Data," in Neural and  Stochastic Methods in Image and Signal Processing III, S. S. Chen,Ed., Proc. SPIE 1994 Int'l. Symposium on Optics, Imaging, andInstrumentation, San Diego, CA, Vol. 2304, pp. 94-104, July 24-29,1994.
  17. P. W. Fieguth, W. C. Karl, and A. S. Willsky, ``Multiresolution Stochastic Processing of Topex/Poseidon Oceanographic Altimetry,"Proc. of OCEANS '94, Brest, France, Vol. 1, pp. 851-855, September13-16, 1994.
  18. P. Milanfar, G. C. Verghese, W. C. Karl, and A. S. Willsky,``Polygon Reconstruction from Moments Using Array Processing," Proc. of the Sixth IEEE Digital Signal Processing Workshop, YosemiteNational Park, CA, pp. 153-156, October 2-5, 1994.
  19. I. Polyak, A. S. Willsky, and W. C. Karl, ``Robust Knot Detectionand Spline Approximation Using Wavelet Transform Extrema andMulti-Target Tracking," Proc. of the 1994 IEEE InternationalSymposium on Time-Frequency and Time-Scale Analysis, Philadelphia, PA,pp. 290-293, October 25-28, 1994.
  20. H. Krim, A. S. Willsky, and W. C. Karl, ``Multiresolution Modelsfor Random Fields and Their Use in Statistical Image Processing,"Proceedings 1994 IEEE-IMS Workshop on Information Theory andStatistics, Alexandria, VA, October 27-29, 1994.
  21. R. E. Learned, H. Krim, B. Claus, A. S. Willsky, and W. C. Karl,``Convergence study of an iterative joint detector for wavelet packetmultiple-access communication," Proc. of the 1994 IEEE InternationalSymposium on Time-Frequency and Time-Scale Analysis, Philadelphia, PA,pp. 512-515, October 25-28, 1994.
  22. M. Bhatia, W. C. Karl, and A. S. Willsky, ``Wavelet Based Methodsfor Tomographic Reconstruction," Invited talk. Proc. of the 16thAnnual International Conference of the IEEE Engineering in Medicineand Biology Society, Workshop on Wavelets in Medicine and Biology,Baltimore, MD, pp. 2a-3a, November 3-6, 1994.
  23. M. Bhatia, W. C. Karl, and A. S. Willsky, ``Wavelet-BasedMultiscale Stochastic Models for Efficient Tomographic Discriminationof Fractal Fields," Proc. of the First IEEE International Conferenceon Image Processing, Austin, TX, pp. 135-139, November 13-16, 1994.
  24. P. W. Fieguth, A. S. Willsky, and W. C. Karl, ``MultiresolutionStochastic Imaging of Satellite Oceanographic Altimetric Data,"Proc. of the First IEEE International Conference on Image Processing,Austin, TX, pp. 1-5, November 13-16, 1994.
  25. P. Milanfar, W. C. Karl, A. S. Willsky, and G. C. Verghese,``Moment-Based Geometric Image Reconstruction," Proc. of the FirstIEEE International Conference on Image Processing, Austin, TX, pp. 825-829, November 13-16, 1994.
  26. W. W. Irving, W. C. Karl, and A. S. Willsky, ``A Theory forMultiscale Stochastic Realization," Proc. of the 33rd IEEEConference on Decision and Control, Lake Buena Vista, FL, pp. 655-662, December, 1994.
  27. P. Fieguth, W. C. Karl, A. S. Willsky, ``MultiresolutionStatistical Analysis and Assimilation of Large Ocean Data Sets,"Proc. 1995 International Conference on Acoustics, Speech, and SignalProcessing, Atlanta, GA, Vol. 5, May 9-12, 1995
  28. R. W. Stadler, W. C. Karl, S. F. Ibrahim, and R. S. Lees,``Noninvasive Measurement of Endothelium-Dependent Vasoreactivity:Implications for the Assessment of Atherosclerosis," Proc. of the1995 Annual Fall Meeting of the BMES, Boston, MA, October 8-12, 1995.
  29. S. Jaggi, W. C. Karl, S. Mallat, A. S. Willsky, ``MultiscaleGeometrical Feature Extraction and Object Recognition with Waveletsand Morphology," Proc. 1995 International Conference on ImageProcessing, Washington, DC, Vol 3, pg 372-375, October 23-26, 1995.
  30. P. W. Fieguth, W. W. Irving, M. M. Daniel, C. H. Fosgate, M. K.Schneider, A. H. Krim, W. C. Karl, and A. S. Willsky,``Multiresolution Stochastic Models: Methodology and Applications inRemote Sensing, Image Processing, and Radar," Proc. Ninth Image andMulti-Dimensional Signal Processing, Belieze City, Belieze, March3-6, 1996.
  31. M. Schneider, P. Fieguth, W. C. Karl, A. S. Willsky, ``Multiscale Methods for the Segmentation of Images," Proc. 1996 InternationalConference on Acoustics, Speech, and Signal Processing, Atlanta, GA,May 7-10, 1996.
  32. A. B. Frakt, W. C. Karl, A. S. Willsky, ``Multiscale Hypothesis Testing with Application to Anomaly Characterization from Tomographic Projections," Proc. 1996 International Conference on Image Processing, Lausanne, Switzerland, September 16-19, 1996.
  33. C. H. Fosgate, H. Krim, A. S. Willsky, and W. C. Karl,``Multiscale Segmentation and Anomaly Enhancement of SAR Imagery," Proc. 1996 International Conference on Image Processing, Lausanne,Switzerland, September 16-19, 1996.
  34. J. Kaufhold, M. K. Schneider, W. C. Karl, and A. S. Willsky, ``A Recursive Estimation Approach to the Segmentation of MR Imagery,"Workshop on MR Signal Processing, Univ. of Illinois a tUrbana-Champaign, Urbana, Illinois, October 18-20, 1997.
  35. M. Cetin and W. C. Karl, ``Inversion and Inferencing Based on Tomographic Data," 1997 Progress in Electromagnetics Research Symposium special session on Imaging, Tomography, and Holography,July 7-11, 1997, Cambridge, MA.
  36. Farzad Kamalabadi, Joshua L. Semeter, William C. Karl, Daniel M.Cotton, Timothy A. Cook, and Supriya Chakrabarti, ``Space-basedionospheric remote sensing using tomographic inversion of radiativerecombinative EUV sources," Annual NSF Conference on Coupling,Energetics, and Dynamics of Atmospheric Regions, Boulder, Colorado,June 1997. (Best paper award)
  37. R. C. Chan, W. C. Karl, and R. S. Lees, ``Quality Enhancement ofArterial Measurements Based on a More Accurate Stochastic Model ofX-Ray Cine-angiography," Proceedings of the International  Conference on Image Processing, Vol. 3, pg 508, Santa Barbara, CA,October 26-29, 1997.
  38. J. Kaufhold, M. K. Schneider, W. C. Karl, and A. S. Willsky, ``MRImage Segmentation and Data Fusion using A Statistical Approach,"Proceedings of the International Conference on Image Processing,Vol. 2, pg 506, Santa Barbara, CA, October 26-29, 1997.
  39. M. Saeed, W. C. Karl, T. Nguyen, and H. R. Rabiee, ``BayesianRestoration of Noisy Images with the EM Algorithm," Proceedings of the International Conference on Image Processing, Vol. 2, pg322, Santa Barbara, CA, October 26-29, 1997.
  40. M. Cetin and W. C. Karl, ``A Statistical Tomographic Approach toSynthetic Aperture Radar Image Reconstruction,"International  Conference on Image Processing, Vol. 1, pg 845, Santa Barbara, CA,October 26-29, 1997.
  41. J. Kaufhold and W. C. Karl. ``Reconstructing Thin 3-D StructuresFrom Optical Blur Using Optical Sectioning Microscopy," Proceedingsof the 1997 Annual Fall Meeting of the Biomedical Engineering Society,San Diego CA, October 2-5, 1997.
  42. M. Bosse, W. C. Karl, D. A. Castanon, and P. A. Debitetto, ``AVision Augmented Navigation System," IEEE Conf. on IntelligentTransportation Systems, special session on Applications of ComputerVision to Intelligent Vehicles, pg 1028-1033, Boston, MA, Nov. 9-12,1997.
  43. R. A. Weisenseel, W. C. Karl, D. A. Castanon, and C.DiMarzio, ``A Statistical Approach to Multi-Channel Spatial Modeling for the Detection of Mine-Like Targets," in Detection and Remediation Technologies for Mines and Mine-Like Targets III,Abinash C. Dubey, Robert L. Barnard, editors, Proc SPIE V 3392.Orlando, 1998.
  44. E. L. Miller, W. C. Karl, and S. J. Norton, ``On the Detection of Buried Mines from Array Inductive Measurements," in Detection  and Remediation Technologies for Mines and Mine-Like Targets III,Abinash C. Dubey, Robert L.  Barnard, editors, Proc SPIE V 3392.Orlando, 1998.
  45. M. Saeed, W. C. Karl, T. Q. Nguyen, and H. R. Rabiee, ``A New Multiresolution Algorithm for Image Segmentation," in  Proceedings of the International Conference on Acoustics, Speech, and Signal Processing, Seattle, WA, May 12-15, 1998.
  46. E. L. Miller and W. C. Karl, ``On the detection of buried objectsfrom inductive arrays," 1998 Progress in Electromagnetics Symposium, Nantes, France, July 1998.
  47. E. L. Miller and W. C. Karl, ``Detection and Localization of Buried Objects from Near-Field Sensor Array Data: Physical Models and Statistical Processing," Proceedings of the 1998 International  Conference on Image Processing, Chicago Il., October 1998.
  48. M. Cetin and W. C. Karl, ``A Statistical Method for Discrimination of Natural Terrain Types from SAR Data," Proceedings of the 1998 International Conference on Image  Processing, Chicago, IL, October, 1998.
  49. J. Kaufhold, W. C. Karl and D. A. Castanon, ``A NestedRecursive Approach to MAP Estimation based on Gauss-Markov RandomFields," Proceedings of the 1998 International Conference on Image Processing, Chicago, IL, October, 1998,
  50. J. Kaufhold and W. C. Karl, ``A Nonparametric Defocus-BasedApproach to Reconstructing Thin 3D Structures in Optical SectioningMicroscopy," Proceedings of the 1998 International Conference on  Image Processing, Chicago, IL, October, 1998.  
  51. J. Kaufhold, W. C. Karl, R. Chan. ``A Texture-based Variational Segmentation Method for Ultrasound Blood Vessel Imagery," Proceedingsof the 1998 Annual Fall Meeting of the Biomedical Engineering Societyin Cleveland, OH October 10-13th 1998.
  52. R. A. Weisenseel, W. C. Karl, D. A. Castanon, and R. C.Brower, ``An Anisotropic Cluster Algorithm for Segmentation," Proceedings of the 1998 International Conference on Image Processing, Chicago, IL, October, 1998.
  53. R. A. Weisenseel, W. C. Karl, D. A. Castanon, and C.DiMarzio, ``Statistical sensor fusion analysis of near-IR polarimetric and thermal imagery for the detection of mine-like targets," in Environmental Monitoring and Remediation Technologies, R.L.Spellicy, T.Vo-Dinh editors, Proc. SPIE V 3534, SPIE, Boston, 1998.
  54. N. Aggarwal and W. C. Karl, ``Line Detection in Images through Regularized Hough Transform," in Proc. of the Conf. on Information Science and Systems, Johns Hopkins University, March,1999.
  55. S. Oraintara, W. C. Karl, D. A. Castanon, and T. Nguyen, ``A Reduced Computation Method for Choosing the Smoothing Parameter in Tikhonov Regularization Problems." in Proc. of the Conf. on Information Science and Systems, Johns Hopkins University, March,1999.
  56. J. Kaufhold, R. Chan, W. C. Karl, and D. A. Castanon, ``UltrasoundTissue Analysis and Characterization," in Battlefield  Biomedical Technologies, H. H.  Pien editor, Proc.  SPIE V 3712,SPIE, Orlando, April 5-9, 1999.
  57. R. Weisenseel, W. C. Karl, D. A. Castanon, C. Rappaport, E.Miller, C. DiMarzio, ``Statistical Fusion of GPR and EMI Data," inDetection and Remediation Technologies for Mines and Minelike Targets IV, A. C. Dubey, J. F. Harvey, J. T. Broach, and R. E.Dugan editors, Proc. SPIE V 3710, SPIE, Orlando, April 5-9, 1999.
  58. R. Weisenseel, W. C. Karl, D. A. Castanon, P. Douville, G. J.Power, ``Markov Random Field Segmentation Methods for SAR TargetChips," in Algorithms for Synthetic Aperture Radar Imagery  VI, E. G. Zelnio editor, Proc. SPIE V 3721, SPIE, Orlando, April5-9, 1999.
  59. Mujdat Cetin and W. Clem Karl, ``A Statistical Method forSynthetic Aperture Radar Imaging," 1999 IEEE Conference on SignalProcessing and Its Applications (SIU'99), June 1999, Ankara, Turkey.
  60. W. S. Hoge, D. Brooks, H. Lev-Ari, W. C. Karl, L. P. Panych, E. L.Miller, ``Efficient Region of Interest Approximation for MR ImageAcquisition," Proc. of the International Society for Magnetic Resonance in Medicine 7th Scientific Meeting and Exhibition, pg1644, May, 1999.
  61. R. Weisenseel, W. C. Karl, D. A. Castanon, ``Land mine detection through GPR and EMI sensor fusion," in Environmental Monitoring and Remediation Technologies II, T. Vo-Dinh and R. L. Spellicyeditors, Proc. SPIE V 3853, SPIE, Boston, September 20-22, 1999.
  62. H. Feng, D. A. Castanon, W. C. Karl, ``Underground Imaging Basedon Edge-Preserving Regularization," in Proc. of the IEEEInternational Conference on Information, Intelligence and Systems,Washington, DC, November 1-3, 1999
  63. D.F. Kacher, E. Gao, H.M. O'Leary, W.E. Kyriakos, J.P. Kaufhold,Q.Y. Ma, W.M. Wells, W.C. Karl and F.A. Jolesz, ``RF CoilSensitivity Estimation for Intensity Correction or Encoding," inProc. of the International Society for Magnetic Resonance in Medicine 8th Annual Meeting, pg. 1405, Denver, CO, March, 2000.
  64. H. Feng, D. A. Castanon, and W. C. Karl, ``A Shape-BasedApproach to Buried Landmine Imaging," Proc. of JCIS, International Conference on Computer Vision, Pattern Recognition,  and Image Processing 2000, Atlantic City, NJ, March, 2000.
  65. M. Cetin, W. C. Karl, and D. A. Castanon, ``Evaluation of aregularized SAR imaging technique based on recognition-orientedfeatures," in Algorithms for Synthetic Aperture Radar Imagery VII, E. G. Zelnio editors, Proc. SPIE V 4053, SPIE, Orlando, April24-28, 2000.
  66. H. Feng, D. A. Castanon, W. C. Karl, and E. L. Miller, ``GPR Imaging Approaches for Buried Plastic Landmine Detection," inDetection and Remediation Technologies for Mines and Mine-Like  Targets V, A. C. Dubey, J. F. Harvey, J. T. Broach, and R. E.Dugan editors, Proc. SPIE V 4038, SPIE, Orlando, April 24-28, 2000.
  67. R.C. Chan, J. Kaufhold, W.C. Karl, R.S. Lees, ``Ultrasound Analysis of Vascular Structure and Deformation," in Battlefield Biomedical Technologies II, H. H. Pien editor, Proc. SPIE V 4037B,SPIE, Orlando, April 24-28, 2000. 
  68. Mujdat Cetin and W. Clem Karl, ``Enhanced, High Resolution Radar Imaging based on Robust Regularization," Proc. 2000 IEEE Int'l Conf. on Acoustics, Speech, and Signal Processing, Istanbul,Turkey, Vol. 4, pg 2278-2281, June, 2000.
  69. H. Feng, D. A. Castanon, and W. C. Karl, ``Tomographic Reconstruction Using Curve Evolution," Proc. of IEEE  International Conference on Computer Vision and Pattern Recognition 2000, Hilton Head, SC, Vol. 1, pg 361-366, June13-15, 2000.
  70. N. Aggarwal and W. C. Karl, ``Line detection in images through regularized Hough transform," Proc. of the 2000 IEEE   International Conference on Image Processing, Vancouver, BritishColumbia, Canada, Vol. 3, pg 873-876, September 10-13, 2000.
  71. M. Cetin and W. C. Karl, ``Superresolution and edge-preservingreconstruction of complex-valued synthetic aperture radar images,"Proc. of the 2000 IEEE International Conference on Image  Processing, Vancouver, British Columbia, Canada, Vol. 1, pg701-704, September 10-13, 2000.
  72. R. C. Chan, J. Kaufhold, W. C. Karl, R. S. Lees, and D. A. Castanon,``A variational energy approach for estimating vascular structure anddeformation from B-mode ultrasound imagery," Proc. IEEE International Conference on Image Processing, Vancouver, BritishColumbia, Canada, Vol. 1, pg 160-163, 10-13 September 10-13 2000.
  73. H. Feng, D. A. Castanon, W. C. Karl, and E. L. Miller,``Object-Based Reconstruction Using Coupled Tomographic Flows," Proc. of the 2000 IEEE International Conference on Image Processing, Vancouver, British Columbia, Canada, Vol. 2, pg625-628, September 10-13, 2000.
  74. H. Feng, D. A. Castanon, W. C. Karl, ``A Statistical Approach to Rough Surface Underground Imaging," Proc. of the 2000 IEEE   International Conference on Image Processing, Vancouver, BritishColumbia, Canada, September 10-13, 2000.
  75. S. Oraintara, W.C. Karl, D.A. Castanon, and T.Q. Nguyen, ``A Method for Choosing the Regularization Parameter in GeneralizedTikhonov Regularized Linear Inverse Problems," Proc. of the 2000 IEEE International Conference on Image Processing, Vancouver,British Columbia, Canada, Vol. 1, pg 93-96, September 10-13, 2000.
  76. R. A. Weisenseel, W. C. Karl, and D. A. Castanon, ``A Region-Based Alternative for Edge-Preserving Smoothing,"  Proc. of the 2000 IEEE International Conference on Image Processing, Vancouver, British Columbia, Canada, Vol. 3, pg 778-781, September 10-13, 2000.
  77. R. C. Chan, J. Kaufhold, W. C. Karl, L. C. Hemphill, and R. S.Lees, ``Anisotropic edge-preserving smoothing carotid B-modeultrasound for improved segmentation and intima-media thicknessmeasurement," Proc. of Computers in Cardiology 2000,Cambridge, MA., pg 37-40, 24-27 September 2000.
  78. W. S. Hoge, E. L. Miller, D. H. Brooks, L. P. Panych, and W. Clem Karl, ``An Adaptive Image Estimate Framework for Low Order Dynamic Magnetic Resonance Imaging," Proc. IEEE DSP Workshop,Hunt, TX, October 15-18, 2000.
  79. V. Galdi, W. C. Karl, D. A. Castanon, and L. B. Felsen,``Approaches to Underground Imaging for Object Localization," in Detection and Remediation Technologies for Mines and Mine-Like  Targets VI, A. C. Dubey, J. F. Harvey, J. T. Broach, and V. Georgeeditors, Proc. SPIE V 4394, SPIE, Orlando, FL, pp. 1082-1091, April16-20, 2001.
  80. H. Feng, D. A. Castanon, W. C. Karl, ``A curve evolutionapproach for image segmentation using adaptive flows,"Proceedings of the Eighth International Conference on Computer Vision, Vancouver, Canada, Vol. 2, Pg. 494-499, July 9-12, 2001.
  81. J. Pavlovich, V. Galdi, W.C. Karl, D.A. Castanon, and L.B.Felsen, ``Time-domain reconstruction of moderately rough dielectricinterfaces via quasi-ray Gaussian beams," Proc. 2001 IEEE Antennas and Propagat. Int. Symposium, Boston, MA, USA, Vol. II, pg.682-685, July 8-13, 2001.
  82. A. K. Swan, L. Moiseev, Y. Tong, S. Lipoff, W. C. Karl, B. B.Goldberg, M. S. Unlu, ``High resolution spectral self- interference fluorescence microscopy," Proceedings of the SPIE Conference on Three-Dimensional and Multidimensional Microscopy: Image Acquisition and Processing IX, Vol. 4621, pg. 77-85, San Jose, CA, 22-23 Jan. 2002.
  83. M. Cetin and W. C. Karl, ``Complex-valued image reconstruction byhalf-quadratic regularization,", SIAM Conference on Imaging Science, Boston, MA, March 4-6, 2002.
  84. M. Cetin, W. C. Karl and D. A. Castanon, ``Analysis of theImpact of Feature-Enhanced SAR Imaging on ATR Performance," inAlgorithms for Synthetic Aperture Radar Imagery IX, E. G.Zelnio editor, Proc. SPIE, SPIE, Orlando, April 1-5, 2002.
  85. M. Cetin, W. C. Karl and D. A. Castanon, ``Formation of HRRProfiles by Non-Quadratic Optimization for Improved FeatureExtraction," in Algorithms for Synthetic Aperture Radar Imagery IX, E. G.  Zelnio editor, Proc. SPIE , SPIE, Orlando,April 1-5, 2002.
  86. A. Litvin and W. C. Karl, ``Image segmentation based on priorprobabilistic shape models," Proc. 2002 IEEE Int'l Conf. on Acoustics, Speech, and Signal Processing, Orlando, Florida, Vol. 4,pg. 3572-3575, May 13-17, 2002.
  87. Y. Shi and W. C. Karl, ``Dynamic Tomography With Curve EvolutionMethods," Proc. 2002 IEEE Int'l Conf. on Acoustics, Speech,  and Signal Processing, Orlando, Florida, Vol. 4, pg.  3229-3232,May 13-17, 2002.
  88. V. Galdi, H. Feng, J. Pavlovich, D.A. Castanon, W.C. Karl, andL.B. Felsen, ``Quasi-ray Gaussian beam algorithms for subsurface sensing in the presence of a moderately rough air-soil interface,"2002 IEEE Antennas and Propagation Int. Symposium, San Antonio, TX, p.765-768, June 16-21, 2002 (invited paper).
  89. V. Galdi, L.B. Felsen, and D.A. Castanon, ``3-D short pulse scattering by moderately rough dielectric interfaces via quasi-rayGaussian beams," 2002 IEEE Antennas and Propagation Int. Symposium,San Antonio, TX, June 16-21, 2002.
  90. V. Galdi, J. Pavlovich, W.C. Karl, D.A. Castanon, and L.B. Felsen,``Adaptive approaches to rough surface underground imaging I:Interface profile reconstruction," 2002 Progress in ElectromagneticsResearch Symposium (PIERS 2002), Cambridge, MA, July 1-5, 2002(invited paper).
  91. V. Galdi, H. Feng, D.A. Castanon, W.C. Karl, and L.B. Felsen,``Adaptive approaches to rough surface underground imaging II: Targetreconstruction," 2002 Progress in Electromagnetics Research Symposium(PIERS 2002), Cambridge, MA, July 1-5, 2002 (invited paper).
  92. J. Pavlovich, W.C. Karl, V. Galdi, D.A. Castanon and L.B. Felsen,``3-D physics based underground imaging via edge-preservingregularization," 2002 Progress in Electromagnetics Research Symposium(PIERS 2002), Cambridge, MA, July 1-5, 2002 (invited paper).
  93. V. Galdi, L.B. Felsen, and D.A. Castanon, ``Gabor-based quasi-rayGaussian beam algorithms for scattering by moderately roughsurfaces," 2002 Progress in Electromagnetics Research Symposium(PIERS 2002), Cambridge, MA, July 1-5, 2002 (invited paper).
  94. M. Desai, D. Kennedy, R. Mangoubi, J. Shah, W. C. Karl, N.Markis, A. Worth, ``Diffusion tensor model based smoothing,"Proceedings of the 2002 IEEE International Symposium on BiomedicalImaging, Pg 705-708, Washington, DC, July 7-10, 2002.
  95. V. Galdi, L.B. Felsen, and D.A. Castanon, ``Narrow-waistedGaussian beam algorithms as efficient forward solvers in complexpropagation and scattering scenarios: Refinement and furthercalibrations of previously obtained preliminary algorithms," XXVIIURSI General Assembly, Maastricht, The Netherlands, Aug. 17-24, 2002(invited paper).
  96. V. Galdi, H. Feng, J. Pavlovich, D.A. Castanon, W.C. Karl, andL.B. Felsen, ``Narrow-waisted Gaussian beam algorithms as efficientsolvers for imaging in complex propagation environments," XXVII URSIGeneral Assembly, Maastricht, The Netherlands, Aug. 17-24, 2002(invited paper). 
  97. M. Desai, R Mangoubi, D. Kennedy, J. Shah, C. Karl, A. Worth, N.Markis , ``Diffusion tensor model based smoothing",  Proc. IEEE  Conf. On Medical Imaging, pg. 705-708, July 7-10, 2002,Washington DC
  98. M. Cetin, W. C. Karl, and A. S. Willsky, ``Edge-Preserving ImageReconstruction for Coherent Imaging Applications," Proc. 2002  IEEE International Conference on Image Processing, Rochester, NY,Vol. 2, p. 481-484, Sept. 22-25, 2002.
  99. R. A. Weisenseel, W. C. Karl, and R. Chan, ``Shared-boundary fusionfor estimation of noisy multi-modality atherosclerotic plaqueimagery," Proc. 2002 IEEE International Conference on Image  Processing, Rochester, NY, p. 157-160, Sept. 22-25, 2002.
  100. Y. Shi, W. C. Karl, and D. A. Castanon, ``Dynamic Tomography UsingCurve Evolution With Spatial-Temporal Regularization," Proc.  2002 IEEE International Conference on Image Processing, Rochester,NY, Vol. 2, pg. 629-632, Sept. 22-25, 2002.
  101. M. Saeed and W. C. Karl, ``Image Segmentation UtilizingWavelet-Based Spatially Adaptive Kernels," Proc. 2002 IEEE  International Conference on Image Processing, Rochester, NY, p.777-780, Sept. 22-25, 2002.
  102. Y. Shi, W. C. Karl, and D. Castanon, ``Dynamic Object-BasedTomographic Reconstruction," Proc. of the Thirty-Sixth AsilomarConference on Signals, Systems, and Computers, Vol. 1, Pg 906-910,November 3-6, 2002.
  103. R. C. Chan, W. C. Karl, R. S. Lees, ``Robust Estimation ofArterial Strain from Non-Invasive Carotid Ultrasound Images,"Proceedings of 24th Annual Conference of the Engineering in Medicineand Biology and the Annual Fall Meeting of the Biomedical EngineeringSociety (EMBS/BMES Conference), Vol. 2, pg. 1313-1314, Oct. 2002.
  104. C. L. Baird, B. Lin, J. Gerstenmeier, B. Cunningham, P. Li, J. Qiu,W. C. Karl, ``A Novel Biosensor for High-Throughput, Label-Free SmallMolecule Detection," Keystone Symposia A3: New Advances in DrugDiscovery, Park City, Utah, Jan 7-12, 2003.
  105. Y. Shi and W. C. Karl, ``Tomographic Reconstruction of DynamicObjects," in Computational Imaging, C. A. Bouman and R. L.Stevenson editors, Proc. SPIE, Vol. 5016, SPIE, Santa Clara, CA,January 20-24, 2003.
  106. Y. Shi and W. Karl, ``Object-based Dynamic Tomography," invitedlecture at the 2003 IEEE AP-S International Symposium andUSNC/CNC/URSI National Radio Science Meeting, Columbus, Ohio, June22-27, 2003
  107. S. Chakrabarti, T. Cook, K. Wilton, D. Ghosh Roy, W. C. Karl,``Use of Tomography for Spectral Imaging in the SPIDR Mission,"Proceedings of the General Assembly of the International AstronomicalUnion, Sydney, Australia, 13-26 July, 2003.
  108. M. Cetin, W. C. Karl, and A. S. Willsky, ``An Edge-PreservingRegularization Method for Coherent Imaging Applications," IEEEConference on Signal Processing and Communications Applications,Istanbul, Turkey, June 2003 (in Turkish).
  109. A. Litvin and W. C. Karl, ``Level set-based segmentation usingfeature histogram shape priors," 2003 IEEE Workshop on StatisticalSignal Processing, St. Louis, Sept. 28-Oct. 1, 2003
  110. Y. Shi and W. C. Karl, ``A Multiphase Level Set method fortomographic reconstruction of dynamic objects," 2003 IEEE Workshopon Statistical Signal Processing, St. Louis, Sept. 28-Oct. 1, 2003
  111. W. C. Karl and H. Pien, ``High-Resolution Biosensor Spectral PeakShift Estimation," Proc. of the Thirty-Seventh AsilomarConference on Signals, Systems, and Computers, % Vol. 1, Pg 906-910, November 3-6, 2003.
  112. S. Venkatesh and W. C. Karl, ``A Semi-Definite ProgrammingApproach to Estimating Distributed Sources," Proc. of theThirty-Seventh Asilomar Conference on Signals, Systems, and Computers, Vol. 1, Pg 906-910, November 3-6, 2003.
  113. Y. Shi and W. C. Karl, ``Multiple Motion and Occlusion Segmentation with A Multiphase Level Set Method," inComputational Imaging, C. A. Bouman and R. L. Stevenson editors, Proc. SPIE, Vol. 5016, SPIE, Santa Clara, CA, January 20-24,2004. 
  114. A. Litvin and W. C. Karl, ``Shape distributions as priors for image segmentation," in Computational Imaging, C. A. Boumanand R. L. Stevenson editors, Proc. SPIE, Vol. 5016, SPIE, Santa Clara, CA, January 20-24, 2004.
  115. B. J. Davis, W. C. Karl, A. K. Swan, B. B.  Goldberg, M. S. Unluand M. B. Goldberg, ``Reconstruction of objects with a limited numberof non-zero components in fluorescence microscopy," inThree-Dimensional and Multidimensional Microscopy: Image Aquisitionand Processing XI, J.-A. Conchello, C. J. Cogswell and T.  Wilsoneds., Proceedings of the SPIE, Vol. 5324, 2004
  116. Y. Shi and W. C. Karl, ``Level-set methods for dynamic tomography," Proc. 2004 IEEE Intl. Symposium on Biomedical Imaging, pg. 620-623, Arlington, VA, 15-18 April, 2004.
  117. B. J. Davis, W. C. Karl, B. B. Goldberg, A. K.Swan, M. S. Unlu, ``Sampling below the Nyquist rate in interferometric fluorescence microscopy with multi-wavelength measurements to remove aliasing," IEEE 11th Digital Signal Processing Workshop, 2004, pg. 329-333, Aug 1-4, 2004.
  118. B. B. Goldberg, A. K. Swan, L. Moiseev, M. Dogan, W. C. Karl, B. Davis, C. R. Cantor, S. B. Ippolito, S. A. Thorne, M. G. Eraslan, Z. Liu, M. B. Goldberg, M. S. Onlu, ``Seeing inside chips and cells: high-resolution subsurface imaging of integrated circuits, quantum dots and subcellular structures," International Quantum Electronics Conference (IQEC), Pgs. 580-581, 2004.
  119. Y. Shi and W. C. Karl, ``Differentiable minimin shape distance for incorporating topological priors in biomedical imaging," Proc. 2004 IEEE Intl. Symposium on Biomedical Imaging, pg. 1247-1250, Arlington, VA, 15-18 April, 2004.
  120. R. Chan, A. Chau, S. Nadkarni, W. C. Karl, N. Iftimia, G. J. Tearney, B. E. Bouma, ``A variational framework for tissue velocimetry in vascular optical coherence elastography," Optical Society of America Biomedical Topical Meetings 2004, Miami Beach, FL., April 14-17, 2004.
  121. Y. Shi and W. C. Karl, ``Tomographic Reconstruction of Multiple Dynamic Objects," Proc. 2004 SIAM Conference on Imaging Science, Salt Lake City, Utah, May 3-5, 2004.
  122. Y. Shi and W. C. Karl, ``Differentiable Minimin Shape Distance for Maintaining Topology in Curve Evolution," Proc. 2004 SIAM Conference on Imaging Science, Salt Lake City, Utah, May 3-5, 2004.
  123. V. Saligrama, Y. Shi and W. C. Karl, ``Performance Guarantees in Sensor Networks," Proc. 2004 IEEE Int'l Conf. on Acoustics, Speech, and Signal Processing, Montreal, pg. II-269-II-272, May 17-21, 2004.
  124. A. Litvin and W. C. Karl, ``Using Shape Distributions as Priors in a Curve Evolution Framework," Proc. 2004 IEEE Int'l Conf. on Acoustics, Speech, and Signal Processing, Montreal, pg. III-25-III-28, May 17-21, 2004.
  125. Y. Shi and W. C. Karl, ``Shape reconstruction for unorganized points with a data-driven level set methods," Proc. 2004 IEEE Int'l Conf. on Acoustics, Speech, and Signal Processing, pg. III-13-III-16, Montreal, May 17-21, 2004.
  126. Laurent, S., M. Mendillo, J. Wilson, J. Baumgardner, W. C. Karl, and J. Konrad, Design of a high definition imaging (DHI) analysis technique adapted to challenging environments, Proc. SPIE Meeting,
      Denver, CO, July 2004.
  127. K. Dionisio, R. Chan, W. C. Karl, L. W. Campbell, R. S. Lees, ``Three-Dimensional Characterization of Carotid Plaque Structure and Deformation with Non-Invasive Ultrasound Imaging," Computers in Cardiology 2004, Chicago, IL, Sept 20-22, 2004.
  128. Y. Shi and W. C. Karl, ``A fast level set method without solving PDEs," Proc. 2005 IEEE Int'l Conf. on Acoustics, Speech, and Signal Processing, pg. II-97-II-100, Philadelphia, March 20-23, 2005. Student Paper Award Winner.
  129. B. Davis, W. C. Karl, B. B. Goldberg, A. K. Swan, and M. S. Ünlü, ``Using out-of-focus light to improve image acquistion time in confocal microscopy," Proceedings of SPIE: Three-Dimensional and Multidimensional Microscopy: Image Acquisition and Processing XII, Vol. 5701, March 2005
  130. Y. Shi and W. C. Karl, ``Real-time tracking using level sets", IEEE Computer Society Conference on Computer Vision and Pattern Recognition, 2005 (CVPR 2005), Volume 2, Pgs. 34-41, June 20-25, 2005.
  131. A. Litvin and W. C. Karl, ``Coupled shape distribution-based segmentation of multiple objects," Proceeding of 19th Information Processing in Medical Imaging (IPMI 2005), Glenwood Springs, Colorado, July 10-15, 2005.
  132. H. Feng, W. C. Karl, D. A. Castanon, ``LADAR Range Image Segmentation using Curve Evolution and Maximum Likelihood Estimation," Proc. of the Thirty-Ninth Asilomar Conference on Signals, Systems, and Computers, October 30-November 2, 2005.
  133. B. J. Davis, M. S. Unlu, A. K. Swan, B. B. Goldberg, W. C. Karl, ``Using Multi-Element Detectors to Create Optimal Apertures in Confocal Microscopy," The 18th Annual Meeting of the IEEE Lasers and Electro-Optics Society, 2005 (LEOS 2005), Pg. 547-548, Oct. 23-27, 2005.\
  134. Julia Pavlovich, W. Clem Karl, Bahaa E.A. Saleh, A.V. Sergienko, M.C. Teich, ``Parameter Estimation in Quantum Optical Coherence Tomography," Proc. Optical Society of America Meeting, 2005.
  135. A. Litvin, W. C. Karl, J. Shah, ``Shape and appearance modeling with feature distributions for image segmentation," Proceedings of the 2006 IEEE International Symposium on Biomedical Imaging, Arlington, VA, April 6--9, 2006.
  136. Brynmor J. Davis, William C. Karl, Anna K. Swan, M.  Selim Unlu, Bennett B. Goldberg, ``Making Use of Rejected Light - Improved Imaging with Multi-Channel Detection in Confocal and 4Pi Microscopy," Proceedings of Optical Society of America, Frontiers in Optics 2006/Laser Science XXII, Rochester, New York. October 8-12, 2006.
  137. Brynmor J. Davis, P. Scott Carney, Anna K. Swan, M.  Selim Unlu, W. Clem Karl and Bennett B. Goldberg, ``Fluorescence Imaging with Nanometer Precision using Spectral Self-Interference Microscopy," 3rd International Conference on Electromagnetic Near-Field Characterization and Imaging (ICONIC), St. Louis, MO, June 27-29, 2007.
  138. Z. Liang, S. Do, W. C. Karl, U. Hoffmann, T. J. Brady, H. Pien, ``Calcium de-blooming of coronary CT images," Proc. IEEE Int'l Conf. Bioinformatics and Bioengineering, 2007, 257-62.
  139. Synho Do, Zhuangli Liang, William Clem Karl, Thomas Brady, Homer Pien, ``A projection-driven pre-correction technique for iterative reconstruction of helical cone-beam cardiac CT images," Proceedings of SPIE: Physics of Medical Imaging, Vol. 6913, February, 18-21, 2008.
  140. Zhuangli Liang, Synho Do, W. Clem Karl, Thomas J. Brady, Homer H. Pien, ``Cardiac CT artifact mitigation through decomposition-based image reconstruction," Proceedings of SPIE: Physics of Medical Imaging, Vol. 6913, February, 18-21, 2008.
  141. Burkay B. Orten, W. Clem Karl, Dushant V. Sahani, Homer H. Pien, ``A new deconvolution approach to perfusion imaging exploiting spatial correlation," Proceedings of SPIE: Physiology, Function, and Structure from Medical Images, Vol.  6916, February, 17-19, 2008.
  142. Ivana Stojanovic, W. Clem Karl, Mujdat Cetin, ``Joint space-aspect reconstruction of wide-angle SAR exploiting sparsity," Proceedings of SPIE: Algorithms for Synthetic Aperture Radar Imagery XV, Vol. 6970, March, 17-18, 2008.Z
  143. Zhuangli Liang, Synho Do, W. Clem Karl, Thomas Brady, Homer Pien, ``Analysis and Mitigation of Calcium Artifacts in Multidetector CT," Proceedings of 2008 IEEE Intl. Symposium on Biomedical Imaging, Paris, FR, May, 2008.
  144. Michael J. King, Bruce Black, Bernard Harris, Michael Hynes, Richard Lanza, W. Clem Karl, David Castanon, ``Cooperative Semi-Autonomous Mobile Networked Sensors for Enhanced Location of Radiological Threats," 9th International Conference on Applications of Nuclear Techniques, 2008.
  145. S. Do, M. K. Kalra, Z. Liang, W. C. Karl, T. J. Brady, H. Pien, ``Noise properties of iterative reconstruction techniques in low-dose CT scans," Proceedings of SPIE: Physics of Medical Imaging, Vol. XXXX, Lake Buena Vista, FL, February, 7-12, 2009.
  146. Ivana Stojanovic, W. Clem Karl, ``An overcomplete dictionary approach to imaging of moving targets with multistatic SAR , Compressive Sensing Workshop, Duke University,  Feb 25-26, 2009.
  147. Ivana Stojanovic, W. Clem Karl, Mujdat Cetin, ``Compressed sensing of monostatic and mulitistatic SAR," Proceedings of SPIE: Algorithms for Synthetic Aperture Radar Imagery XVI, Vol. 7337, April, 14-16, 2009.
  148. Synho Do, Sanghee Cho, W. Clem Karl, Mannudeep K Kalra, Thomas J. Brady, and Homer Pien, ``Accurate Model-Based High Resolution Cardiac Image Reconstruction in Dual source CT," 2009 IEEE Intl. Symposium on Biomedical Imaging, Boston MA, June, 2009.
  149. Sonal Ambwani, Sanghee Cho, W. Clem Karl, Ahmed Tawakol, and Homer Pien, ``A Preliminary Study of Motion Estimation using Optical Flow and Super-Resolution in Cardiac PET/CT." 2009 IEEE Intl. Symposium on Biomedical Imaging, Boston MA, June, 2009.
  150. L. He, B. B. Orten, S. Do, W. C. Karl, A. Kambadakone, D. V. Sahani, and H. Pien, "Spatio-Temporall Deconvolution of Perfusion CT Data in Rectal Tumor Patients,” 2009 IEEE Intl. Symposium on Biomedical Imaging, Boston MA, June, 2009.
  151. Synho Do, Sanghee Cho, W. Clem Karl, Mannudeep K. Kalra, Thomas J. Brady, and Homer Pien, "CT system response models in iterative reconstruction algorithms for low-dose imaging,” in Proceedings of the 10th International Meeting on Fully 3D Image Reconstruction in Radiology and Nuclear Medicine, Beijing, China, 2009
  152. Nishant Mohan, Ivana Stojanovic, W. Clem Karl, Bahaa E. A. Saleh, and Malvin C. Teich, ”Compressed sensing in optical coherence tomography,” Proc. SPIE 7570, San Francisco CA, February 2010.
  153. S. Do, W. C. Karl, M. K. Kalra, T. J. Brady, and H. Pien, ”Clinical low dose CT image reconstruction using high-order total variation techniques,” Proc. SPIE, Vol. 7622, p. 76225D, San Diego, CA, USA, 2010.
  154. S. Do, W. C. Karl, M. K. Kalra, T. J. Brady, and H. Pien, "A variational approach for reconstructing low dose images in clinical helical CT,” IEEE International Symposium Biomedical Imaging (ISBI), Rotterdam, The Netherlands, pp. 784-787, 2010
  155. W. C. Karl, "Object-based tomography for joint segmentation and reconstruction,” Invited talk, Tomography in Materials Science Workshop, Dayton, OH, Dec 13-15, 2010.
  156. L. Eger, W. C. Karl, P. Ishwar, H. Pien, "Classification-aware dimensionality reduction methods for explosives detection using multi-energy X-ray computed tomography,” in Computational Imaging, C. A. Bouman, I. Pollak, P. J. Wolfe, editors, Proc. SPIE, Vol. 7873, SPIE, San Francisco, CA, January 23-27, 2011.
  157. S. Do, M. K. M. D. Kalra, H. Pien, S. Sarabjeet, W. C. Karl, T. Brady, "High-order noise analysis for low dose iterative image reconstruction: ASIR, IRIS, and MBAI,” SPIE Physics of Medical Imaging, Lake Buena Vista, Orlando, 12-17 February 2011
  158. S. Do, W. C. Karl, and H. Pien, ”A Novel Hybrid Algorithm for Accelerating CT Reconstructions and Improving Low-Dose Image Quality”, IEEE International Symposium Biomedical Imaging (ISBI), Chicago, Il, May 2011.
  159. S. Ambwani, W. C. Karl, A. Tawakol and H. Pien, "Joint cardiac and respiratory motion correction and super-resolution reconstruction in coronary PET/CT,” IEEE International Symposium Biomedical Imaging (ISBI), Chicago, Il, May 2011.
  160. I.Stojanovic, N.Mohan, B. Vakoc, W.C. Karl, "Fast angiographic OCT imaging using sparse representations over learned dictionaries,” IEEE International Symposium Biomedical Imaging (ISBI), Chicago, Il, May 2011.
  161. L. Eger, S. Do, P. Ishwar, W. C. Karl, H. Pien, "A Learning Based Approach to Explosives Detection Using Multi-Energy X-Ray Computed Tomography,”. Proc. 2011 IEEE Int’l Conf. on Acoustics, Speech, and Signal Processing, Prague, Czech Republic, May 22-27, 2011.
  162. B. B. Orten, P. Ishwar, W. C. Karl, V. Saligrama and H. Pien, ”Sensing-Aware Classification with High-Dimensional Data.” Proc. 2011 IEEE Int’l Conf. on Acoustics, Speech, and Signal Processing, Prague, Czech Republic, May 22-27, 2011.
  163. A. Tuysuzoglu, I. Stojanovic, D. Castanon, W.C. Karl, "Graph cut method for linear inverse problems,” IEEE International Conference on Image Processing, Brussels, NL, September 11-14, 2011.
  164. B. Orten, P. Ishwar, W. C. Karl, and V. Saligrama, Sensing structure in learning-based binary classification of high-dimensional data, in Proc. 49th Annual Allerton Conference on Communication, Control, and Computing, Monticello, IL, September 2830, 2011, [Invited paper in special session on distributed inference in sensor networks]
  165. I. Stojanovic, H. Pien, S. Do, W. C. Karl, "Low-Dose X-Ray CT Reconstruction Based on Joint Sinogram Smoothing and Learned Dictionary-Based Representation,” IEEE Intl. Symposium on Biomedical Imaging (ISBI), Barcelona, Spain, May 2-5, 2012.
  166. Y. Zhang, W. C. Karl, G. V. Der Wilden, P. Fagenholz, J. Romero, V. Noble, H. Pien, "Automated 3-D Untraocular Ultrasound Detection of Elevated Intracranial Pressure,”, IEEE Intl. Symposium on Biomedical Imaging (ISBI), Barcelona, Spain, May 2-5, 2012.
  167. A. Tuysuzoglu and W. C. Karl, "A Graph-Cut Method for Tomographic Reconstruction,” IEEE Workshop on Statistical Signal Processing, Special Session on Signal Processing for Materials Science, Ann Arbor, Michigan, August, 2012
  168. Z. Sun; W. C. Karl; P. Ishwar; V. Saligrama, “Sensing Aware Dimensionality Reduction for Nearest Neighbor Classification of High Dimensional Signals,” IEEE Workshop on Statistical Signal Processing, Special Session on Signal Processing for Materials Science, Ann Arbor, Michigan, August 5-8, 2012
  169. A. Tuysuzoglu, W. C. Karl, D. A. Castanon, S. Unlu, “Joint Reconstruction and Segmentation of Electron tomography data,” in Computational Imaging, C. A. Bouman, I. Pollak, P. J. Wolfe, editors, Proc. SPIE, Vol. 8657, SPIE, San Francisco, CA, February 3-7, 2013.
  170. M. H. Rohban, P. Ishwar, B. Orten, W. C. Karl, V. Saligrama, “An Impossibility Result for High Dimensional Supervised Learning,”, submitted to IEEE Int. Symposium on Info. Theory (ISIT) Jan. 2013.
  171. K M. Brown, T. Hoehler, F. Bergner, R. Bippus, B. Brendel, S. Zabic, W. C. Karl, S. Singh, A. Padole,
    S. Do, “Sparse Sampling for CT Dose Reduction,” Submitted to the 12th Intl. Meeting on Fully 3D Image Reconstruction in Radiology and Nuclear Medicine, Lake Tahoe, CA, June 16-21, 2013.
  172. S. Do, W. C. Karl, T. Brady, G. El Fahkri, R. Gupta, “A Non-Uniform Super-Resolution Compressive Sampling Method for Tomographic Imaging,” Submitted to the 12th Intl. Meeting on Fully 3D Image Reconstruction in Radiology and Nuclear Medicine, Lake Tahoe, CA, June 16-21, 2013.

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