Image transformation, compression, and decompression codecs
Imagecodecs is a Python library that provides block-oriented, in-memory buffer transformation, compression, and decompression functions for use in tifffile, liffile, czifile, zarr, and other scientific image input/output packages.
Decode and/or encode functions are implemented for the following codecs, image formats, and data transforms: Zlib (DEFLATE), GZIP, LZMA, ZStandard (ZSTD), OpenZL, Blosc, Brotli, Snappy, BZ2, LZ4, LZ4F, LZ4HC, LZ4H5, LZW, LZO, LZF, LZFSE, LZHAM, PGLZ (PostgreSQL LZ), RCOMP (Rice), HCOMP, PLIO, ZFP, SZ3, Meshopt, Pcodec, SPERR, AEC, SZIP, LERC, EER, ZSTD1 (Zstd with hilo filter), NPY, B2ND, BCn, DDS, BMP, PNG, APNG, GIF, PCX/DCX, TGA (TARGA), TIFF, WebP, JPEG (2 to 16-bit), Lossless JPEG (LJPEG, LJ92, JPEGLL), JPEG 2000 (JP2, J2K), High-throughput JPEG 2000 (HTJ2K, JPH), JPEG LS, JPEG XL, JPEG XS, JPEG XR (WDP, HD Photo), Ultra HDR (JPEG_R), MOZJPEG, AVIF, HEIF, EXR, WIC (Windows Imaging Component), WavPack, QOI, RGBE (HDR), PixarLog, Jetraw, DICOM RLE, CCITT (RLE, T.4 and T.6), PackBits, Packed Integers (TIFF, MONO p and packed), Delta, XOR Delta, Floating Point Predictor, Bitorder reversal, Byteshuffle, Bitshuffle, Float24 (24-bit floating point), Bfloat16 (brain floating point), Quantize (Scale, BitGroom, BitRound, GranularBR), and CMS (color space transformations). Checksum functions are implemented for CRC-32, Adler-32, Fletcher-32, and Jenkins lookup3.
Changes
- Add B2ND codec based on Blosc2 library.
- Add ISAL codec based on ISA-L library (handles deflate, zlib, and gzip).
- Add OPENZL codec based on OpenZL library (currently Windows and decode only).
- Add block_size, prog_order, and profile parameters to htj2k_encode.
- Add fancyupsampling parameter to jpeg decoder functions.
- Fix tiff_encode modifies input array.
- Avoid unnecessary memory initialization.
- Optimize LZW codec.