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13 October 1987 Image Sequence Compression With A Subjective Criterion
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Proceedings Volume 0845, Visual Communications and Image Processing II; (1987)
Event: Cambridge Symposium on Optics in Medicine and Visual Image Processing, 1987, San Diego, CA, United States
In the previous paper, the techniques of dual-mode coding were introduced. One of the techniques uses the two-dimensional delta modulation to code the image pixels. In this scheme, the predictor is switched between the Graham's predictor and the normal predictor which sends the direction bits. The bit rate is the lowest of the considered systems. In this paper, the channel coding of the system is considered. Especially in coding the difference bits, several methods were studied including the ordering of the bits according to the two-dimensional statistics of the difference bit map. The window for the predictor of the difference bits was designed to maximize the coding efficiency. For a variety of images tested in this paper, the bit rates for the difference bits were in the range 0.6717 - 0.8774 bits/pixel which are about 11 to 28 percent less than those of the one-dimensional run-length coded bits.
© (1987) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Choon Lee and Morton Nadler "Image Sequence Compression With A Subjective Criterion", Proc. SPIE 0845, Visual Communications and Image Processing II, (13 October 1987);


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