Psychophysical Rating Of Image Compression Techniques
Charles S. Stein, Andrew B. Watson, Lewis E. Hitchner · Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE · 1989
Image compression schemes abound with little work which compares their bit-rate performance based on subjective fidelity measures. Statistical measures of image fidelity, such as squared error measures, do not necessarily correspond to subjective measures of image fidelity. Most previous comparisons of compression techniques have been based on these statistical measures. We used a psychophysical method to estimate, for a number of compression techniques, a threshold bit-rate yielding a criterion level of performance in discriminating original and compressed images. The compression techniques studied include Block Truncation, Laplacian Pyramid, Block Discrete Cosine Transform, with and without a human visual system scaling, and Cortex Transform coders.