Prakash Ishwar

JOURNAL ARTICLES

• N. Ma and P. Ishwar, “The Infinite-Message Limit of Two-Terminal Interactive Source Coding,” IEEE Transactions on Information Theory, accepted for publication (Feb. 2013).
  
• K. Guo, P. Ishwar, and J. Konrad, “Action Recognition from Video using Feature Covariance Matrices,” IEEE Transactions on Image Processing, accepted for publication (Feb. 2013).
• Y. Wang, S. Rane, S. C. Draper, and P. Ishwar, “A Theoretical Analysis of Authentication, Privacy and Reusability Across Secure Biometric Systems,” IEEE Transactions on Information Forensics and Security, vol. 7, no. 6, pp. 1825-1840, Dec. 2012.
  
• N. Ma, P. Ishwar, and P. Gupta, “Interactive Source Coding for Function Computation in Collocated Networks,” IEEE Transactions on Information Theory, vol. 58, pp. 4289-4305, Jul. 2012.
• N. Ma and P. Ishwar, “Some results on distributed source coding for interactive function computation,” IEEE Transactions on Information Theory, vol. 57, pp. 6180-6195, Sep. 2011.
• N. Ma and P. Ishwar, “On delayed sequential coding of correlated sources,” IEEE Transactions on Information Theory, vol. 57, pp. 3763-3782, Jun. 2011.
• A. Kumar, P. Ishwar, and K. Ramchandran, “High-resolution distributed sampling of bandlimited fields with low-precision sensors,” IEEE Transactions on Information Theory, vol. 57, pp. 476-492, Jan. 2011.
• A. Kumar, P. Ishwar, and K. Ramchandran, “Dithered A/D conversion of smooth non-bandlimited signals,” IEEE Transactions on Signal Processing, vol. 58, pp. 2654-2666, May 2010.
• E. Masry and P. Ishwar, “Field estimation from randomly located, binary noisy sensors,” IEEE Transactions on Information Theory, vol. 55, pp. 5197-5210, Nov. 2009.
• Z. Li, P. Ishwar, and J. Konrad, “Video condensation by ribbon carving,” IEEE Transactions on Image Processing, vol. 18, pp. 2572-2583, Nov. 2009. [Project website]
• Y. Wang and P. Ishwar, “Distributed field estimation using randomly deployed, noisy, binary sensors,” IEEE Transactions on Signal Processing, vol. 57, pp. 1177-1189, Mar. 2009.
• Y. Wang, P. Ishwar, and V. Saligrama, “One-bit distributed sensing and coding for field estimation in sensor networks,” IEEE Transactions on Signal Processing, vol. 56, pp. 4433-4445, Sep. 2008.
• R. Puri, A. Majumdar, P. Ishwar, and K. Ramchandran, “Distributed Video Coding in Broadband Wireless Sensor Networks,” IEEE Signal Processing Magazine, Special Issue on Distributed Signal Processing in Sensor Networks, vol. 23, no. 4, pp. 94-106, Jul. 2006.
• P. Ishwar and P. Moulin, “On the existence and characterization of the maxent distribution under general moment inequality constraints,” IEEE Transactions on Information Theory, vol. 51, pp. 3322-3333, Sep. 2005.
• P. Ishwar, R. Puri, K. Ramchandran, and S. S. Pradhan, “On rate-constrained distributed estimation in unreliable sensor networks,” IEEE Journal on Selected Areas in Communications, Special issue on Self-Organizing Distributed Collaborative Sensor Networks, vol. 23, pp. 765-775, Apr. 2005.
• M. Johnson, P. Ishwar, V. M. Prabhakaran, D. Schonberg, and K. Ramchandran, “On compressing encrypted data,” IEEE Transactions on Signal Processing, Special supplement on Secure Media, vol. 52, part 2, pp. 2992-3006, Oct. 2004.
• P. Ishwar and P. Moulin, “On the equivalence of set-theoretic and maxent MAP estimation,” IEEE Transactions on Signal Processing, vol. 51, pp. 698-713, Mar. 2003.
• P. Ishwar and P. Moulin, “On spatial adaptation of motion field smoothness in video coding,” IEEE Transactions on Circuits and Systems for Video Technology, vol. 10, pp. 980-989, Sep. 2000.

BOOK CHAPTERS

• Y. Wang, N. Ma, M. Zhao, P. Ishwar, and V. Saligrama, “Distributed field estimation with one-bit sensors,” in Networked Sensing Information and Control (V. Saligrama, ed.), pp. 137-158, Springer, New York, NY, 2008.
• A. Kumar, P. Ishwar, and K. Ramchandran, “On distributed sampling of smooth non-bandlimited fields,” in IPSN 2004: Third International Symposium on Information Processing in Sensor Networks, April 26-27, 2004, Berkeley, CA, pp. 89-98, ACM Press, 2004.
• P. Ishwar, A. Kumar, and K. Ramchandran, “Distributed sampling for dense senor networks: a “bit-conservation principle”,” in Information Processing in Sensor Networks: Second International Workshop, IPSN 2003, Palo Alto, CA, April 22-23, 2003, (Lecture Notes in Computer Science) (L. J. Guibas and F. Zhao, eds.),  pp. 17-31, Springer, New York, NY 2003.
• P. Ishwar, R. Puri, S. S. Pradhan, and K. Ramchandran, “On rate-constrained estimation in unreliable sensor networks,” in Information Processing in Sensor Networks: Second International Workshop, IPSN 2003, Palo Alto, CA, April 22-23, 2003, (Lecture Notes in Computer Science) (L. J. Guibas and F. Zhao, eds.),  pp. 178-192, Springer, New York, NY 2003.
• P. Ishwar and P. Moulin, “Image modeling and restoration – information fusion, set-theoretic methods, and the maximum entropy principle,” in Bayesian Inference and Maximum Entropy Methods in Science and Engineering: 20th International Workshop, Gif-sur-Yvette, France, 8-13 July 2000 (Ali Mohammad-Djafari, ed.), pp. 204-215, American Institute of Physics, 2001.

CONFERENCE ARTICLES

• K. Lai, J. Konrad, and P. Ishwar, “Towards gesture-based user authentication,” in Proc. IEEE Int. Conf. Advanced Video and Signal-Based Surveillance (AVSS), Beijing, China, 18-21 Sep. 2012, pp. 282-287.
• Z. Sun, P. Ishwar, W. C. Karl, and V. Saligrama, “Sensing aware dimensionality reduction for nearest neighbor classification of high dimensional signals,” in Proc. IEEE International Statistical Signal Processing (SSP) Workshop, Ann Arbor, MI, 5-8 Aug., 2012, pp. 405-408. [Special session on “Challenges in High-Dimensional Learning and Inference: Fundamental Limits and Algorithms”.]
• K. Lai, J. Konrad, and P. Ishwar, “GestureMouse: A Flexible Gesture-Based User Interface,” in the ChaLearn Gesture Challenge Demonstration Competition at CVPR’12, Providence, RI, 16-21 Jun., 2012.
• J. Konrad, M. Wang, and P. Ishwar, “2D-to-3D image conversion by learning depth from examples,” in 3D Cinematography Workshop (3DCINE’12) at CVPR’12, Providence, RI, 16-21 Jun., 2012, pp. 16-22.
  
• N. Goyette, P.-M. Jodoin, F. Porikli, J. Konrad, and P. Ishwar, “changedetection.net: A new change detection benchmark dataset,” in Proc. IEEE Workshop on Change Detection (CDW’12) at CVPR’12, Providence, RI, 16-21 Jun., 2012. pp. 1-8.
• K. Lai, J. Konrad, and P. Ishwar, “A gesture-driven computer interface using Kinect,” in Proc. IEEE Southwest Symposium on Image Analysis and Interpretation (SSIAI), Santa Fe, New Mexico, 22-24 Apr., 2012, pp. 185-188.
• J. Konrad, G. Brown, M. Wang, P. Ishwar, C. Wu, and D. Mukherjee,“Automatic 2D-to-3D image conversion using 3D examples from the Internet,” in Proc. IST/SPIE International Symposium on Electronic Imaging: Science and Technology, Conference on Stereoscopic Displays and Applications (SDA), San Francisco, CA, vol. vol. 8288, 23-25 Jan. 2012.
• 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, 28-30 Sep., 2011, pp. 1521-1528. [Invited paper in special session on distributed inference in sensor networks]
• Y. Wang and P. Ishwar,“On unconditionally secure multi-party sampling from scratch,” in Proc. IEEE International Symposium on Information Theory, Saint Petersburg, Russia, 31 Jul. – 5 Aug., 2011, pp. 1782-1786 [ISIT 2011 student paper award finalist].
• M. Wang, J. Konrad, P. Ishwar, Y-K. Jing, and H. Rowley, “Image saliency: from intrinsic to extrinsic context,” in Proc. IEEE International Conference on Computer Vision and Pattern Recognition (CVPR), Colorado Springs, CO, 21-23 Jun., 2011, pp. 417-424.
• L. Eger, S. Do, P. Ishwar, W. C. Karl, and H. Pien, “A learning-based approach to explosives detection using multi-energy x-ray computed tomography,” in Proc. IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP), Prague, Czech Republic, 22-27 May, 2011, pp. 2004-2007.
• B. Orten, P. Ishwar, W. C. Karl, and V. Saligrama, “Sensing-aware classification with high-dimensional data,” in Proc. IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP), Prague, Czech Republic, 22-27 May, 2011, pp. 3700-3703.
• L. Eger, P. Ishwar, W. C. Karl, and H. Pien, “Classification-aware dimensionality reduction methods for explosives detection using multi-energy x-ray computed tomography,” in Proc. SPIE International Conference on Computational Imaging IX, San Francisco, CA, 7 Feb. 2011, vol. 7873.
• Y. Wang, S. Rane, S. C. Draper, and P. Ishwar,“An information-theoretic analysis of revocability and reusability in secure biometrics,” in Proc. 6th IEEE International Workshop on Information Theory and Applications (ITA), San Diego, CA, 6-11 Feb., 2011, pp.  1-10. [Invited paper]
• Y. Wang, S. Rane, W. Sun, and P. Ishwar,“On unconditionally secure computation with vanishing communication cost,” in Proc. 48th Annual Allerton Conference on Communication, Control, and Computing, Monticello, IL, 29 Sep. – 1 Oct., 2010, pp. 944-950.
• K. Guo, P. Ishwar, and J. Konrad, “Action recognition using sparse representation on covariance manifolds of optical flow,” in  Proc. 7th IEEE-ACM International Conference on Advanced Video and Signal-Based Surveillance (AVSS), Boston, MA, 29 Aug. – 1 Sep., 2010, pp. 188-195. [AVSS 2010 Best Paper Award]
• K. Guo, P. Ishwar, and J. Konrad, “Action recognition in video by sparse representation on covariance manifolds of silhouette tunnels,” in Proc. IEEE International Conference on Pattern Recognition (ICPR), Istanbul, Turkey, 23 – 26 Aug., 2010 , pp.  [Semantic Description of Human Activities Contest, SDHA contest web site, Winner of Aerial View Activity Classification Challenge]
• N. Ma and P. Ishwar,“Infinite-message interactive function computation in collocated networks,” in Proc. IEEE International Symposium on Information Theory (ISIT), Austin, TX, 13-18 Jun., 2010, pp. 1868-1872.
• N. Ma and P. Ishwar,“Interaction strictly improves the Wyner-Ziv rate-distortion function,” in Proc. IEEE International Symposium on Information Theory (ISIT), Austin, TX, 13-18 Jun., 2010, pp. 61-65.
• K. Guo, P. Ishwar, and J. Konrad,“Action change detection in video by covariance matching of silhouette tunnels,” in Proc. IEEE International Conference on Acoustics Speech and Signal Processing (ICASSP), Dallas, TX, 14-19 Mar., 2010, pp. 1110-1113.
• K. Guo, P. Ishwar, and J. Konrad,“Action recognition in video by covariance matching of silhouette tunnels,” in Proc. XXII Brazilian Symposium on Computer Graphics and Image Processing (Sibgrapi), Rio de Janeiro, Brazil, 11-14 Oct., 2009, pp. 299-306.
• N. Ma and P. Ishwar,“Infinite-message distributed source coding for two-terminal interactive computing,” in Proc. 47th Annual Allerton Conference on Communication, Control, and Computing, Monticello, IL, 30 Sep. – 2 Oct., 2009, pp. 1510-1517. [Invited paper in special session on multiterminal source coding]
• Y. Wang and P. Ishwar,“Bootstrapped oblivious transfer and secure two-party function computation,” in Proc. IEEE International Symposium on Information Theory (ISIT), Coex, Seoul, Korea, 28 Jun. – 3 Jul., 2009, pp. 1303-1307.
• N. Ma, P. Ishwar, and P. Gupta, “Information-theoretic bounds for multiround function computation in collocated networks,” in Proc. IEEE International Symposium on Information Theory (ISIT), Coex, Seoul, Korea, 28 Jun. – 3 Jul., 2009, pp. 2306-2310.
• N. Ma and P. Ishwar,“Two-terminal distributed source coding with alternating messages for function computation,” in Proc. IEEE International Symposium on Information Theory (ISIT), Toronto, Canada, 6-11 Jul., 2008, pp. 51-55.
• A. Kumar, H. Qin, P. Ishwar, J. Rabaey, and K. Ramchandran,“Fundamental data retention limits in SRAM standby experimental results,” in Proc. 9th IEEE International Symposium on Quality Electronic Design (ISQED), San Jose, CA, 17-19 Mar. 2008, pp. 92-97.
• H. Qin, A. Kumar, K. Ramchandran, J. Rabaey, and P. Ishwar,“Error-tolerant SRAM design for ultra-low power standby operation,” in Proc. 9th IEEE International Symposium on Quality Electronic Design (ISQED), San Jose, CA, 17-19 Mar. 2008, pp. 30-34.
• P. Ishwar and S. S. Pradhan,“A relay-assisted distributed source coding problem,” in Proc. 3rd IEEE International Workshop on Information Theory and Applications (ITA), San Diego, CA, 27 Jan. – 1 Feb., 2008, pp. 136-141. [Invited paper]
• M. Sharif and P. Ishwar,“Benefit of delay on the diversity-multiplexing tradeoffs of MIMO channels with partial CSI,” in Proc. IEEE International Symposium on Information Theory (ISIT), Nice, France, 24-29 Jun., 2007, pp. 2831-2835.
• N. Ma and P. Ishwar,“The value of frame-delays in the sequential coding of correlated sources,” in Proc. IEEE International Symposium on Information Theory (ISIT), Nice, France, 24-29 Jun., 2007, pp. 1496-1500.
• Y. Wang and P. Ishwar,“On non-parametric field estimation using randomly deployed, noisy, binary sensors,” in Proc. IEEE International Symposium on Information Theory (ISIT), Nice, France, 24-29 Jun., 2007, pp. 686-690.
• T. D. C. Little, J. Konrad, and P. Ishwar,“A wireless video sensor network for autonomous coastal sensing,” in Proc. Conference on Coastal Environmental Sensing Networks (CESN), Boston, MA, Apr., 2007, pp. 19-23.
• A. Kumar, H. Qin, P. Ishwar, J. Rabaey, and K. Ramchandran, “Fundamental bounds on power reduction during data-retention in standby SRAM,” in Proc. IEEE International Symposium on Circuits and Systems (ISCAS), New Orleans, LA, 27-30 May, 2007, pp. 1867-1870.
• A. Kumar, H. Qin, P. Ishwar, J. Rabaey, and K. Ramchandran,“Fundamental redundancy versus power trade-off in standby SRAM,” in Proc. IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP), Honolulu, Hawaii, 15-20 Apr., 2007, pp, II-85-II-88.
• N. Ma, Y. Wang, and P. Ishwar,“Delayed sequential coding of correlated sources,” in Proc. 2nd IEEE International Workshop on Information Theory and Applications (ITA), San Diego, CA, 29 Jan. -  2 Feb., 2007, pp. 214-222. [Invited paper]
• Y. Wang, N. Ma, M. Zhao, P. Ishwar, and V. Saligrama, “On universal distributed estimation of noisy fields with one-bit sensors,” in Proc. 44tℎ Annual Allerton Conference on Communication, Control, and Computing, Monticello, IL, Sep. 2006, pp. 741-750. [Invited paper in special session on cooperative wireless communications and sensing]
• I. Stojanovic, M. Sharif, and P. Ishwar,“On the diversity-multiplexing region of broadcast channels with partial channel state information,” in Proc. 44th Annual Allerton Conference on Communication, Control, and Computing, Monticello, IL, Sep. 2006, pp. 322-329.
• P. Ishwar, V. Prabhakaran, and K. Ramchandran,“On source encoding with side-information under ambiguous state of nature,” in Proc. 2006 IEEE International Symposium on Information Theory (ISIT), Seattle, WA, 9-14 Jul., pp. 479-483.
• A. Majumdar, R. Puri, P. Ishwar and K. Ramchandran, “Complexity/performance trade-offs for robust distributed video coding,” in Proc. IEEE International Conference on Image Processing (ICIP), Genova, Italy, 11-14 Sep., 2005, vol. 2, pp. 678-681. [Invited paper in special session on distributed video coding]
• P. Ishwar, R. Puri, A. Majumdar, and K. Ramchandran,“Analysis of motion-complexity and robustness for video transmission,” in Proc. IEEE CommSoc/TCCC International Conference on Wireless Networks, Communications, and Mobile Computing (Wirelesscom), Maui, HI, 13-16 Jun., 2005, vol. 2, pp. 1261-1265.
• S. Draper, P. Ishwar, D. Molnar, V. Prabhakaran, K. Ramchandran, D. Schonberg, and D. Wagner,“An evaluation of PMF-based tests for detection of least significant bit image steganography,” in Proc. 7th International Workshop on Information Hiding (IH), Barcelona, Spain, 6-8 Jun., 2005, pp. 327-341.
• P. Ishwar and K. Ramchandran,“On decoder-latency versus performance tradeoffs in differential predictive coding,” in Proc. IEEE International Conference on Image Processing (ICIP), Singapore, 24-27 Oct., 2004, vol. 2, pp. 1097-1100.
• A. Kumar, P. Ishwar, and K. Ramchandran, “On distributed sampling of bandlimited and smooth non-bandlimited sensor fields,” in Proc. IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP), Montreal, Canada, 17-21 May, 2004, vol. 3, pp. 925-928. [Invited paper in the special session on distributed digital signal processing for sensor networking]
• P. Ishwar, V. M. Prabhakaran, and K. Ramchandran, “On joint classification and compression in a distributed source coding framework,” in Proc. IEEE Statistical Signal Processing (SSP) Workshop, St. Louis, MO, 28 Sep. – 1 Oct., 2003, pp. 34-37. [Invited paper in the special session on compression for sensor networks]
• P. Ishwar, A. Kumar, and K. Ramchandran, “On distributed sampling in dense sensor networks: a “bit-conservation” principle,” in Proc. 41st Annual Allerton Conference on Communication, Control, and Computing, Monticello, IL, 1-3 Oct. 2003, pp. 80-89. [Invited paper in special session on wireless ad-hoc and sensor networks]
• P. Ishwar, V. M. Prabhakaran, and K. Ramchandran,“Compressing encrypted sources using side-information coding,” in Proc. IEEE International Symposium on Information Theory (ISIT), Chicago, IL, 27 Jun. – 2 Jul., 2004, page 210.
• P. Ishwar, V. M. Prabhakaran, and K. Ramchandran,“Towards a theory for video coding using distributed compression principles,” in Proc. IEEE International Conference on Image Processing (ICIP), Barcelona, Spain, 14-17 Sep., 2003, vol. 2, pp. 687-690.
• P. Ishwar, R. Puri, S. S. Pradhan, and K. Ramchandran,“On compression for robust estimation in sensor networks,” in Proc. IEEE International Symposium on Information Theory (ISIT), Yokohama, Japan, 29 Jun. – 4 Jul., 2003, page 193.
• R. Puri, P. Ishwar, S. S. Pradhan, and K. Ramchandran,“Rate-constrained robust estimation for unreliable sensor networks,” in Proc. Thirty-Sixth Annual Asilomar Conference on Signals, Systems, and Computers, Pacific Grove, CA, 3-6 Nov., 2002, vol. 1, pp. 235-239.
• P. Ishwar and P. Moulin,“Shift invariant restoration – an overcomplete maxent MAP framework,” in Proc. IEEE International Conference on Image Processing (ICIP), Vancouver, Canada, 10-13 Sep., 2000, vol. 3, pp. 270-272.
• P. Ishwar and P.Moulin,“Fundamental equivalences between set-theoretic and maximum-entropy methods in multiple-domain image restoration,” in Proc. IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP), Istanbul, Turkey, 5-9 Jun., 2000, vol. 1, pp. 161-164.
• M. Singh, P. Ishwar, K. Ratakonda, and N. Ahuja,“Segmentation based denoising using multiple compaction domains,” in Proc. IEEE International Conference on Image Processing (ICIP), Kobe, Japan, 24-28 Oct., 1999, vol. 1, pp. 372-375.
• P. Ishwar and P. Moulin,“Multiple-domain image modeling and restoration,” in Proc. IEEE International Conference on Image Processing (ICIP), Kobe, Japan, 24-28 Oct., 1999, vol. 1, pp. 362-366.
• P. Ishwar, K. Ratakonda, P. Moulin, and N. Ahuja, “Image denoising using multiple compaction domains,” in Proc. IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP), Seattle, WA, 12-15 May, 1998, vol. 3, pp. 1889-1892. [Invited paper in special session on the role of sparsity in signal processing]
• P. Ishwar and P. Moulin,“Switched control grid interpolation for motion compensated video coding,” in Proc. IEEE International Conference on Image Processing (ICIP), Santa Barbara, CA, 26-29 Oct., 1997, vol. 3, pp. 650-653.
• P. Ishwar, V. M. Gadre, and M. Moudgil, “A wavelet network approach to the non-linear, discrete system identification problem,” in Proc. Second National Conference on Communications (NCC), Bombay, India, Apr. 1996, pp. 193-197.

THESES

• P. Ishwar, A unified framework for image modeling and estimation using measurement constraints, PhD  thesis, Department of Electrical and Computer Engineering, University of Illinois, Urbana, IL, June 2002. (Supervisor: Prof. Pierre Moulin).
• P. Ishwar, On spatial adaptation of smoothness of motion and intensity fields in video coding, MS thesis, Department of Electrical and Computer Engineering, University of Illinois, Urbana, IL, December 1998. (Supervisor: Prof. Pierre Moulin).
• P. Ishwar, Role of multiresolution principles in system identification and adaptive networks, BTech thesis, Department of Electrical Engineering, Indian Institute of Technology, Mumbai, India, April 1996. (Supervisor: Prof. Vikram Gadre).