merge htj2k-beta branch with main #2041
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* Add HT256 compressor Signed-off-by: Pierre-Anthony Lemieux <[email protected]> * Update src/lib/OpenEXR/ImfCompression.h Co-authored-by: Cary Phillips <[email protected]> Signed-off-by: Pierre-Anthony Lemieux <[email protected]> Signed-off-by: Pierre-Anthony Lemieux <[email protected]> * Update src/lib/OpenEXR/ImfCompression.cpp Co-authored-by: Cary Phillips <[email protected]> Signed-off-by: Pierre-Anthony Lemieux <[email protected]> Signed-off-by: Pierre-Anthony Lemieux <[email protected]> * Update website/ReadingAndWritingImageFiles.rst Co-authored-by: Cary Phillips <[email protected]> Signed-off-by: Pierre-Anthony Lemieux <[email protected]> Signed-off-by: Pierre-Anthony Lemieux <[email protected]> * Add channel map Signed-off-by: Pierre-Anthony Lemieux <[email protected]> --------- Signed-off-by: Pierre-Anthony Lemieux <[email protected]> Signed-off-by: Pierre-Anthony Lemieux <[email protected]> Co-authored-by: Cary Phillips <[email protected]>
Signed-off-by: Pierre-Anthony Lemieux <[email protected]>
Signed-off-by: Cary Phillips <[email protected]>
…mySoftwareFoundation#2029) * Allow lowercase r,g and b, and reg, greee and blue. Signed-off-by: Pierre-Anthony Lemieux <[email protected]> * Improved RGB channel detection heuristics Signed-off-by: Pierre-Anthony Lemieux <[email protected]> * Fix Windows build Signed-off-by: Pierre-Anthony Lemieux <[email protected]> * Improve RGB heuristics Add unit tests Signed-off-by: Pierre-Anthony Lemieux <[email protected]> * Removed unusued color channel abbreviations Signed-off-by: Pierre-Anthony Lemieux <[email protected]> --------- Signed-off-by: Pierre-Anthony Lemieux <[email protected]>
* HT256 COMPRESSION Signed-off-by: Todica Ionut <[email protected]> * HT256 Compression fix Signed-off-by: Todica Ionut <[email protected]> --------- Signed-off-by: Todica Ionut <[email protected]>
Signed-off-by: Cary Phillips <[email protected]>
Signed-off-by: Cary Phillips <[email protected]>
Signed-off-by: Cary Phillips <[email protected]>
Signed-off-by: Cary Phillips <[email protected]>
Signed-off-by: Cary Phillips <[email protected]>
Signed-off-by: Cary Phillips <[email protected]>
Signed-off-by: Cary Phillips <[email protected]>
Signed-off-by: Cary Phillips <[email protected]>
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This introduces the htj2k compressor to the main branch, in preparation for release this summer.
Note that we'll be renaming the compressor to "htj2k" shortly.
This includes PR #1883 and subsequent improvements:
The patch proposes to add support for High-Throughput JPEG 2000 (HTJ2K) compression to OpenEXR -- HTJ2K is JPEG 2000 with the HT block coder standardized in Rec. ITU-T T.814 | ISO/IEC 15444-15. As detailed at Evaluating HTJ2K as a compressor option for OpenEXR, HTJ2K demonstrates significant improvements in both speed and file size over other OpenEXR compressors. Furthermore, HTJ2K is a worldwide standard that benefits from a diversity of implementations, builds on JPEG 2000, which is in broad use in studio workflows, is appropriate for long-term preservation, has both lossy and lossless modes and supports integer and floating point samples. Finally, the unique features of HTJ2K could be powerful additions to high-performance OpenEXR workflows where the full image may not always be viewed at its full resolution.
The patch defines a ht256 compressor, which uses 256-scanline chunks (this is not a limitation of HTJ2K, which can support any number of scanlines) and the open-source OpenJPH library.
Website preview: https://openexr--2041.org.readthedocs.build/en/2041/