Visually lossless compression of digitized radiographs based on contrast sensitivity and visual masking

作者: Damon M. Chandler , Nathan L. Dykes , Sheila S. Hemami

DOI: 10.1117/12.595614

关键词: Contrast (vision)Compression ratioLossless compressionArtificial intelligenceMasking (art)Quantization (image processing)Visual maskingJPEG 2000MathematicsPattern recognitionComputer visionWavelet

摘要: A visually lossless compression algorithm for digitized radiographs, which predicts the maximum contrast that wavelet subband quantization distortions can exhibit in reconstructed image such are undetectable, is presented. Via a psychophysical experiment, thresholds were measured detection of 1.15-18.4 cycles/degree five radiographs; results indicate radiographs impose image- and frequency-selective effects on detection. presented individual images based model visual masking. When incorporated into JPEG-2000 applied to suite images, be compressed manner at an average ratio 6.25:1, with some requiring ratios as low 4:1 great 9:1. The proposed thus yields require minimum bit-rate indistinguishable from original images. primary utility its ability provide image-adaptive compression, thereby avoiding overly conservative or aggressive compression.

参考文章(30)
Sergei Hludov, Christoph Meinel, Compression of Medical Images. SIP. pp. 275- 278 ,(1999)
C. Poynton, The rehabilitation of gamma human vision and electronic imaging conference. pp. 232- 249 ,(1998)
Norma Van Surdam Graham, Visual Pattern Analyzers ,(1989)
Gordon E. Legge, John M. Foley, Contrast masking in human vision Journal of the Optical Society of America. ,vol. 70, pp. 1458- 1471 ,(1980) , 10.1364/JOSA.70.001458
Marcia G. Ramos, Sheila S. Hemami, Suprathreshold wavelet coefficient quantization in complex stimuli: psychophysical evaluation and analysis. Journal of The Optical Society of America A-optics Image Science and Vision. ,vol. 18, pp. 2385- 2397 ,(2001) , 10.1364/JOSAA.18.002385
Julian Minguillon, Jaume Pujol, Uniform quantization error for Laplacian sources with applications to JPEG standard SPIE's International Symposium on Optical Science, Engineering, and Instrumentation. ,vol. 3456, pp. 77- 88 ,(1998) , 10.1117/12.330356
Richard M. Slone, David H. Foos, Bruce R. Whiting, Edward Muka, David A. Rubin, Thomas K. Pilgram, Kevin S. Kohm, Susan S. Young, Paul Ho, Dan D. Hendrickson, Assessment of Visually Lossless Irreversible Image Compression: Comparison of Three Methods by Using an Image-Comparison Workstation Radiology. ,vol. 215, pp. 543- 553 ,(2000) , 10.1148/RADIOLOGY.215.2.R00AP47543
Ingrid Daubechies, Wim Sweldens, Factoring wavelet transforms into lifting steps Journal of Fourier Analysis and Applications. ,vol. 4, pp. 131- 157 ,(1998) , 10.1007/BFB0011095