F. Ciaramello, R. Vanam, S. S. Hemami, E. Riskin, R. Ladner, "Joint Rate-Intelligibility-Complexity Optimization of an H.264 Video Encoder for American Sign Language," Western New York Image Processing Workshop (WNYIP), Rochester, NY, September 2009.
download... PDF[Awarded Best Student Paper]

F. Ciaramello, S. S. Hemami, "Quantifying the Effect of Disruptions to Temporal Coherence on the Intelligibility of Compressed American Sign Language Video," Proc. SPIE Vol. 7240, Human Vision and Electronic Imaging 2009, San Jose, CA, January 2009.
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F. Ciaramello, S. S. Hemami, "Real-time Face and Hand Detection for Videoconferencing on a Mobile Device," Fourth International Workshop on Video Processing and Quality Metrics for Consumer Electronics, Scottsdale, AZ, January 2009.
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F. Ciaramello, S. S. Hemami, "Complexity Constrained Rate-distortion Optimization of Sign Language Video Using an Objective Intelligibility Metric," Proc. SPIE Vol. 6822, Visual Communication and Image Processing 2008, San Jose, CA, January 2008.
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F. Ciaramello, S. S. Hemami, "'Can You See Me Now?' An Objective Metric for Predicting Intelligibility of Compressed American Sign Language Video," Proc. SPIE Vol. 6492, Human Vision and Electronic Imaging 2007, San Jose, CA, January 2007.
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F. Ciaramello, A. Cavender, S. S. Hemami, E. Riskin, R. Ladner, "Predicting Intelligibility of Compressed American Sign Language Video With Objective Quality Metrics," 2006 International Workshop on Video Processing and Quality Metrics for Consumer Electronics, Scottsdale, AZ, January 2006.
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Y. Sermadevi, S. S. Hemami, M. Masry, "Convex Programming Formulations for Rate Allocation in Video Coding" IEEE Transactions on Circuits and Systems for Video Technology, Volume 16, Issue 8, Aug. 2006 Page(s):947 - 959.
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Y. Sermadevi, J. Chen, S.S. Hemami, T. Berger, "When is Bit Allocation for Predictive Video Coding Easy?" Proceedings of the Data Compression Conference, Snowbird, UT, March 2005.
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Y. Sermadevi, S.S. Hemami, "Convexity Results for a Predictive Video Coder," Proceedings of the Asilomar Conference on Signals, Systems and Computers, Asilomar, CA, November 2004.
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Y. Sermadevi, S.S. Hemami, "Efficient Bit Allocation for Dependent Video Coding," Proceedings of the Data Compression Conference, Snowbird, UT, March 2004.
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Y. Sermadevi, M. Masry, S.S. Hemami, "MINMAX Rate Control with a Perceived Distortion Metric," Proceedings of the SPIE - Visual Communications and Image Processing, San Jose, CA, January 2004.
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Y. Sermadevi, S.S. Hemami, "Linear Approximations for Rate Control in Video Coding," Proceedings of ICIP 2003, Barcelona, Spain, September 2003.
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Y. Sermadevi, S.S. Hemami, "Linear Programming Optimization for Video Coding under Multiple Constraints," Proceedings of the Data Compression Conference , Snowbird, UT, March 2003.
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Yan Yang, S. S. Hemami, "Rate control for VBR over ATM: simplification and implementation," IEEE Transactions on Circuits and Systems for Video Technology, September 2001.

Yan Yang, S. S. Hemami, "Rate-distortion optimizations for region and object based wavelet video coding," Proc. of Asilomar Conference on Signals, Systems, and Computers, Pacific Grove, CA, October 2000.
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Yan Yang, S. S. Hemami, "Generalized rate-distortion optimizations for motion-compensated video coding," IEEE Trans. Circuits & Systems for Video Tech., September 2000.
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Yan Yang, S.S. Hemami, "Rate-Distortion Optimization for VBR Environments Using a Motion Compensated Wavelet Coder," Proc. IEEE Int. Conf. on Image Processing, Kobe, Japan, October, 1999.
download... Postscript

Yan Yang, S. S. Hemami, "Minmax Frame Rate Control Using a Rate-Distortion Optimized Wavelet Coder," Proc. IEEE Int. Conf. on Image Processing, Kobe, Japan, October 1999.
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Yan Yang, S.S. Hemami, "A Rate-Distortion Optimized Motion Compensated Wavelet Video Coder", Picture Coding Symposium, Portland, Oregon, April 1999.
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Longer versions of the work listed above are available. Send mail.

M. Masry, S. S. Hemami, Y. Sermadevi, "A scalable wavelet-based video distortion metric and applications" IEEE Transactions on Circuits and Systems for Video Technology, Volume 16, Issue 2, Feb. 2006 Page(s):260 - 273.
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M. A. Masry, S. S. Hemami, "A Metric for the Continuous Quality Evaluation of Video with Severe Distortions," Journal of Signal Processing: Image Communications, Elsevier Press, Volume 19, Issue 2, February 2004, Pages 133-146.
download... PS PDF

G. Yadavalli, M. A. Masry, S. S. Hemami, "Frame Rate Preferences in Low Bit Rate Video," IEEE Intl. Conf. on Image Processing 2003, Barcelona, Spain, September 2003.
download... PS PDF

M. A. Masry, S. S. Hemami, "CVQE: A Continuous Video Quality Evaluation Metric for Low Bit Rates," Proc. Human Vision and Electronic Imaging 2003, San Jose, CA, January 2003.
download... Postscript PDF

M. A. Masry, S. S. Hemami, "An Analysis of Subjective Quality in Low Bit Rate Video," IEEE Intl. Conf. on Image Processing 2001, Thessaloniki, Greece, October 2001.
download... Postscript PDF

M. A. Masry, S. S. Hemami, W. Osberger, A. M. Rohaly, "Subjective Quality Evaluation of Low Bit Rate Video," Proc. Human Vision and Electronic Imaging 2001, San Jose, CA, January 2001.
download... Postscript PDF

S. S. Hemami, "Distortion Analyses for Temporal Scalability Coding Techniques," Proc. IEEE Int. Conf. on Image Processing, Kobe, Japan, October 1999.
download... Postscript PDF
(Journal version: "A Comparison of Temporal Scalability Techniques," IEEE Trans. Circuits and Systems for Video Tech., September 1999.)

Aaron Deever, S. S. Hemami, "Dense Motion Field Reduction for Motion Estimation", Proc. of Asilomar Conf. on Signals, Systems, and Computers, Pacific Grove, CA, November 1998.
download... Postscript

Yan Yang, S. S. Hemami, "Rate-Distortion-Based Combined Motion Estimation and Segmentation", Proc. IEEE Int. Conf. on Image Processing, Chicago, Illinois, October 1998.
Paper... PostScript
Figures... PostScript
IMPORTANT CORRECTION... PostScript

Yan Yang, S. S. Hemami, "Rate-Constrained Motion Estimation and Perceptual Coding", Proc. IEEE Int. Conf. on Image Processing, Santa Barbara, CA, October 1997.
Paper... PDF PostScript
Figures... PDF PostScript

G. J. Conklin, S. S. Hemami, "Evaluation of Temporally Scalable Video Coding Techniques," Proc. IEEE Int. Conf. on Image Processing '97, Santa Barbara, CA, October 1997.
download... PDF PostScript

G. J. Conklin, S. S. Hemami, "Multi-Resolution Motion Estimation," Proceedings of ICASSP '97, Munich, Germany, April 1997.
download... PDF, PostScript

Marcia G. Ramos, S. S. Hemami, "Eigenfeatures Coding of Videoconferencing Sequences," Proceedings Visual Communications and Image Processing '96, Orlando,FL, March 1996.
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Matthew Gaubatz, A. Vosoughi, A. Scaglione and S. S. Hemami, "Efficient, Low Complexity Encoding Of Multiple, Blurred Noisy Downsampled Images via Distributed Source Coding Principles," Proc. IEEE Int. Conf. on Acoustics, Speech, and Signal Processing, Toulose, France, May 2006.
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Matthew Gaubatz, S. S. Hemami, "Fast, Accurate Rate-Control for Low-Rate Wavelet-Based Image Coding via Bootstrapping with Local Probability Models," Proc. IEEE Int. Conf. on Image Processing, Genoa, Italy, September 2005.
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Chao Tian , S. S. Hemami, "An Embedded Image Coding System Based on Tarp Filter with Classfication," Proceedings of IEEE Intl. Conf. on Acoustics, Speech, and Signal Processing, Montreal, Quebec, Canada, May, 2004.
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Matthew Gaubatz, S. S. Hemami, "Local Entropy Estimation for Low-Rate Wavelet Image Coding," Proceedings of 38th Annual Conference on Information Sciences and Systems, Baltimore, MD, March 2004.
download... PDF PostScript

Aaron Deever, S. S. Hemami, "Scalable Image Coding with Projection-Based Context Modeling", Proceedings of ICIP 2000, September, 2000.
download... Postscript

Aaron Deever, S. S. Hemami, "What's Your Sign?: Efficient Sign Coding for Embedded Wavelet Image Coding", Proceedings of Data Compression Conference 2000, Snowbird, Utah, March 2000.
download... PostScript PDF

W. K. Carey, L. A. Von Pischke, S. S. Hemami, "Rate-Distortion Based Scalable Progressive Image Coding," SPIE Conf. on the Mathematics of Data and Image Coding, Compression, and Encryption, San Diego, CA, July 1998.
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W. K. Carey, S. S. Hemami, P. N. Heller, "Smoothness-Constrained Wavelet Image Compression," Proc. IEEE Int. Conf. on Image Processing, Lausanne, Switzerland, September 1996.
download... PDF PostScript
(Journal version available, IEEE Trans. Image Processing, December 1999.)

Chao Tian, S. S. Hemami, "A New Class Class of Multiple Description Scalar Quantizer and Its Application to Im age Coding," IEEE Signal Processing Letters.
Vol. 12, No. 4, pp. 329-332.

Chao Tian , S. S. Hemami, "Optimality and Sub-optimality of Multiple Description Vector Quantization With a Lattice Codebook," IEEE Trans. Information Theory.
Vol. 50, No. 10, pp. 2458-2468.

Chao Tian , S. S. Hemami, "Universal Multiple Description Scalar Quantization: Analysis and Design," IEEE Trans. Information Theory.
Vol. 50, No. 9, pp. 2089-2102.

Chao Tian , S. S. Hemami, "Sequential Design of Multiple Description Scalar Quantizers," Proceedings of Data Compression Conference 2004, Snowbird, Utah, March 2004.
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Chao Tian, S. S. Hemami, "Universal Multiple Description Scalar Quantization: Analysis and Design," Proceedings of Data Compression Conference 2003, Snowbird, Utah, March 2003.
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Chao Tian, S. S. Hemami, "On the Asymptotic Analysis of Multiple Description Scalar Quantization," Proceedings of 37th Annual Conference on Information Sciences and Systems, Baltimore, MD, March 2003.
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D. Rouse, S. S. Hemami, "The Role of Edge Information to Estimate the Perceived Utility of Natural Images," Western New York Image Processing Workshop (WNYIP), Rochester, NY, September 2009.
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D. Rouse, R. Pepion, S. S. Hemami, P. Le Callet, "Image Utility Assessment and a Relationship with Image Quality Assessment," Proc. SPIE Vol. 7240, Human Vision and Electronic Imaging, San Jose, CA, January 2009.
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D. Rouse, S. S. Hemami, "Understanding and Simplifying the Structural Similarity Metric," presented at IEEE Intl. Conf. of Image Proc. (ICIP) San Diego, CA, October 2008.
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D. Rouse, S. S. Hemami, "How to Use and Misuse Image Assessment Algorithms," Western New York Image Processing Workshop (WNYIP), Rochester, NY, September 2008.
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D. Rouse, S. S. Hemami, "Analyzing the Role of Visual Structure in the Recognition of Natural Image Content with Multi-Scale SSIM," Proc. SPIE Vol. 6806, Human Vision and Electronic Imaging, San Jose, CA, January 2008.
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D. Rouse, S. S. Hemami, "Analyzing the Role of Visual Structure in the Recognition of Natural Image Content with Multi-Scale SSIM," Western New York Image Processing Workshop (WNYIP), Rochester, NY, October 2007.
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D. Rouse, S. S. Hemami, "Quantifying the Use of Structure in Cognitive Tasks," Proc. SPIE Vol. 6492, Human Vision and Electronic Imaging 2007, San Jose, CA, January 2007.
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D. Rouse, S. S. Hemami, "Quantifying the Use of Structure in Cognition," Western New York Image Processing Workshop (WNYIP), Rochester, NY, September 2006.
download... PDF [Awarded Best Student Paper]

Matthew Gaubatz, S. Kwan, and S. S. Hemami, "The Role of Spatially-Adaptive v. Non-Spatially-Adaptive Distortion in Supra-Threshold Compression," Proc. Human Vision and Electronic Imaging 2007, San Jose, CA, January 2007.
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Matthew Gaubatz, S. Kwan, B. Chern, D. M. Chandler and S. S. Hemami, "Spatially-Adaptive Wavelet Image Compression via Structural Masking,"Proc. IEEE Int. Conf. on Image Processing, Atlanta, Georgia, October 2006.
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D. M. Chandler, K. H. Lim, and S. S. Hemami, "Effects of Spatial Correlations and Global Precedence on the Visual Fidelity of Distorted Images," Proc. Human Vision and Electronic Imaging 2006, San Jose, CA, January 2006.
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Matthew Gaubatz, D. M. Chandler, and S. S. Hemami, "Spatially-Selective Quantization and Coding for Wavelet-Based Image Compression," Proc. IEEE Int. Conf. on Acoustics, Speech, and Signal Processing, Philadelphia, PA, March 2005.
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D. M. Chandler, N. L. Dykes, and S. S. Hemami, "Visually lossless compression of digitized radiographs based on contrast sensitivity and visual masking," Proc. Medical Imaging 2005, San Diego, CA, 2005.
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Matthew Gaubatz, D. M. Chandler, and S. S. Hemami, "Spatial Quantization via Local Texture Masking," Proc. Human Vision and Electronic Imaging 2005, San Jose, CA, January 2005.
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D. M. Chandler, S. S. Hemami, "Dynamic Contrast-Based Quantization for Lossy Wavelet Image Compression," IEEE Transactions on Image Processing, Vol. 14, No. 4, April 2005.
download... PDF | More Info

Matthew Gaubatz, S. S. Hemami, "Scalable Image Embeddings From Arbitrary Wavelet-Based Perceptual Models," Proc. IEEE Int. Conf. on Acoustics, Speech, and Signal Processing, Montreal, Quebec, Canada, May 2004.
download... PDF PostScript

M. Masry, D. Chandler, and S. S. Hemami, "Digital Watermarking Using Local Contrast-Based Texture Masking," Proceedings of the 37th Asilomar Conference on Signals, Systems and Computers, Pacific Grove, CA, November 2003.
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D. M. Chandler, M. Masry, S. S. Hemami, "Quantifying the visual quality of wavelet-compressed images based on local contrast, visual masking, and global precedence," Proceedings of the 37th Asilomar Conference on Signals, Systems and Computers, Pacific Grove, CA, November 2003.
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D. M. Chandler, S. S. Hemami, "Effects of Natural Images on the Detectability of Simple and Compound Wavelet Subband Quantization Distortions," J. Opt. Soc. Am. A, Vol. 20, No 7, July 2003.
download... PDF | More Info

D. M. Chandler, S. S. Hemami, "Suprathreshold image compression based on contrast allocation and global precedence," Proc. Human Vision and Electronic Imaging 2003, Santa Clara, CA, January 2003.
download... PDF Postscript

D. M. Chandler, S. S. Hemami, "Contrast-Based Quantization and Rate Control for Wavelet-Coded Images," Proc. IEEE Int. Conf. on Image Processing, Rochester, NY, October 2002.
download... PDF Postscript

D. M. Chandler, S. S. Hemami, "Additivity Models for Suprathreshold Distortion in Quantized Wavelet-Coded Images," Proc. Human Vision and Electronic Imaging 2002, San Jose, CA, January 2002. download... PDF

M. G. Ramos, S. S. Hemami, "Suprathreshold wavelet coefficient quantization in complex stimuli: psychophysical evaluation and analysis," Journal of the Optical Society of America A, October 2001.

S. S. Hemami, M. G. Ramos, "Quantifying visual distortion in low-rate wavelet coded images," Proc. IEEE Int. Conf. on Image Processing, Thessaloniki, Greece, October 2001. download... PDF

M. G. Ramos, S. S. Hemami, "Perceptual Quantization for Wavelet-Based Image Coding," Proc. IEEE Int. Conf. on Image Processing, Vancouver, B.C., September 2000. download... Postscript

Sheila S. Hemami, Marcia G. Ramos, "Wavelet coefficient quantization to produce equivalent visual distortion in complex stimuli," Proc. Human Vision and Electronic Imaging 2000, San Jose, CA, January 2000.
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Marcia G. Ramos, Sheila S. Hemami, "Activity Selective SPIHT Coding", SPIE Visual Communications and Image Processing, San Jose, CA, January 1999.
download... PostScript Paper Errata

S. S. Hemami, "Visual Sensitivity Considerations for Subband Coding," Proc. of Asilomar Conf. on Signals, Sytems, and Computers, Pacific Grove, CA, November 1997.
download... PDF PostScript

Marcia G. Ramos, S. S. Hemami, M.A.Tamburro, "Psychovisually-Based Multiresolution Image Segmentation," Proc. IEEE Int. Conf. on Image Processing '97, Santa Barbara, CA, October 1997.
download... PDF PostScript

Marcia G. Ramos, S. S. Hemami, "Edge-adaptive JPEG Image Compression," Proceedings Visual Communications and Image Processing '96, Orlando,FL, March 1996.
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M. E. Buckley, M. G. Ramos, S. S. Hemami, S. B. Wicker, "Perceptually-Based Robust Image Transmission over Wireless Channels," Proc. IEEE Int. Conf. on Image Processing, Vancouver, B.C., September 2000.
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S. S. Hemami, "Robust Image Transmission Using Resynchronizing Variable Length Codes and Error Concealment," IEEE Journal on Selected Areas in Communications, June 2000.
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S. S. Hemami, R. M. Gray, "Subband Coded Image Reconstruction for Lossy Packet Networks," IEEE Transactions on Image Processing, April 1997.
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S. S. Hemami, R. M. Gray, "Subband Filters Optimized for Lost Coefficient Reconstruction," IEEE Transactions on Signal Processing, March 1997.
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S. S. Hemami, "Reconstruction Optimized Lapped Orthogonal Transforms for Robust Image Transmission," IEEE Transactions on Circuits & Systems for Video Technology, Special Issue on Wireless Visual Communications, April 1996.
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S. S. Hemami, "Reconstruction-Optimized Lapped Orthogonal Transforms," Proceedings of ICASSP '96, Atlanta, Georgia, May 1996.
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S. S. Hemami, "Digital Image Coding for Robust Multimedia Transmission," presented at the Symposium on Multimedia Communications and Video Coding, New York, NY, October 1995.
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S. S. Hemami, R. M. Gray, "Subband Filters Optimized for Lost Coefficient Reconstruction," Proceedings ICASSP '95 , Detroit, MI, May 1995.
download... PDF PostScript

M. A. Masry, M. G. Ramos, S. S. Hemami. "Robust Data Hiding using Psychovisual Thresholding," Proc. IEEE Int. Conf. on Image Processing, Vancouver, BC, Canada, September 2001.
download... PDF Postscript

W. Knox Carey, Daniel B. Chuang, S. S. Hemami, "Regularity-Preserving Image Interpolation," Proc. IEEE Int. Conf. on Image Processing, Santa Barbara, CA, 1997.
download... PDF PostScript
(Journal version available, IEEE Trans. Image Processing, September 1999.)

W. Xu, S. S. Hemami, "Distortion Optimized Multiple Channel Image Transmission Under Delay Constraints," Proc. IEEE Intl. Conf. on Acoustics, Speech, and Signal Processing, Montreal, Quebec, Canada, May 2004.
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W. Xu, Y. Sermadevi, S.S. Hemami, "Rate Control for Video Transmission over Multiple Channels in ATM Networks," Western New York Image Processing Workshop, Rochester, NY, Oct. 2003
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W. Xu, S. S. Hemami, "Delay-Optimized Robust Transmission of Image over Multiple Channels," Proc. IEEE Intl. Conf. on Multimedia and Expo, Baltimore, MD, Jul. 2003.
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W. Xu, S. S. Hemami, "Efficient Partitioning of Unequal Error Protected MPEG Video Streams for Multiple Channel Transmission," Proc. IEEE Intl. Conf. on Image Processing, Rochester, NY, Sept. 2002.
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W. Xu, S. S. Hemami, "Spectrally Efficient Partitioning of MPEG Video Streams for Robust Transmission Over Multiple Channels," 2002 International Workshop on Packet Video, Pittsburgh, PA, April 2002.
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