JPX
From Just Solve the File Format Problem
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Overview
JPX is the wavelet-based compressed image format defined by Part 2 of the JPEG 2000 standard. The format syntax is defined in ISO/IEC 15444-2:2004 (E) - ITU-T Rec. T.801 (08/2002) - Annex M - JPX extended file format syntax. Note that the final standards are not freely available, but the committee drafts are. It is an extension to the JP2 format. In addition to the JP2 feature set, JPX also offers:
- Extended colour space support
- Mechanisms for including opacity information
- Fragmented codestreams (even across multiple files)
- The possibility to combine multiple codestreams as composites or animations
- The possibility to have codestreams that use alternative compression methods (uncompresssed, Modified Huffman, Modified READ, Modified Modified READ, JBIG, JPEG, JPEG-LS, JBIG2).
The standard filename extension is .jpf. Apparently, .jpx is also sometimes used.
