Cartesian Perceptual Compression

Unknown

image

Cartesian Perceptual Compression is a proprietary image file format designed for high compression of black-and-white raster document imaging for archival scans.

Identify it

Extensions	`.cpi.cpc`
Signatures	`435043b2` at byte 0 (Cartesian Perceptual Compression)
PRONOM	`fmt/727`
Wikidata	`Q5047276`
Library of Congress	`fdd000007`

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Open it

CPC Toolreads and writes

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Sources

File Formats Wiki
PRONOM fmt/727
Wikidata Q5047276

From Just Solve the File Format Problem (File Formats Wiki), PRONOM, Wikidata. Updated 2026-10-24.

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