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Report of the ISO
ON CARTESIAN PERCEPTUAL COMPRESSION

In July 1995, the International Organization for Standardization (ISO) Working Group on Coding for Still Pictures (ISO/IEC JTC1/SC29/WG1) tested Cartesian Perceptual Compression (CPC) in comparative tests against several other information-theoretically lossless and lossy binary image compression methods. This document summarizes the findings of these tests.

The ISO report N238, "Image Quality Test Results for JTC 1.29.10", is made available here as well, in CPC format. Interestingly, the report itself serves as an excellent example of CPC compression, requiring less than 3K bytes per page to store high-resolution images of the pages, a factor of 6.3:1 better than TIFF Group 4. The ISO distributed the report initially in rich text format (RTF), requiring some 23.7 times more space than CPC format.

The ISO results show that:


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