[dependabot]

Bumps imagecodecs from 2026.8.16 to 2026.10.10.

Release notes

Sourced from imagecodecs's releases.

v2026.10.10

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 Byte compressors: AEC, Blosc, Blosc2, Brotli, BZ2, CZI ZSTD1 and CHUNKED (with hilo filter), DEFLATE (zlib, isa-l, libdeflate, zlib-ng), GZIP, LZ4, LZ4F, LZ4H5, LZF, LZFSE, LZHAM, LZMA, LZO, LZW, OpenZL, PackBits, PGLZ (PostgreSQL LZ), Snappy, Szip, Zopfli, and ZStandard (ZSTD); Image formats: APNG, AVIF, BCn, BMP, DDS, EXR, GIF, HEIF, High-throughput JPEG 2000 (HTJ2K, JPH), JPEG (2 to 16-bit), JPEG 2000 (JP2, J2K), JPEG LS, JPEG XR, JPEG XS, Lossless JPEG (LJPEG, LJ92, JPEGLL), MOZJPEG, PCX, PNG, QOI, RGBE (HDR), TGA (TARGA), TIFF, Ultra HDR (JPEG_R), WebP, and WIC (Windows Imaging Component); Image compressors: CCITT (RLE, T.4 and T.6), DICOM RLE, and PixarLog; Scientific compressors: B2ND, EER, HCOMP, Jetraw, LERC, NPZ, Pcodec, PLIO, RCOMP (Rice), SPERR, SZ3, and ZFP; Filters: Bitorder reversal, CMS (color space transformations), Delta, Quantize (Scale, BitGroom, BitRound, GranularBR), and XOR Delta; Shufflers: Bitshuffle, Byteshuffle, Floating Point Predictor, Meshopt, Packed Integers (TIFF, MONO p and packed), and WavPack, Type conversions: Bfloat16 (brain floating point), and Float24 (24-bit floating point); and Checksums: CRC-32, Adler-32, Fletcher-32, and Jenkins lookup3.

Changes

• Reject 0-D input to array codecs (#151, breaking).
• Reject bitspersample outside dtype range (breaking).
• Reject dtype too wide for bitspersample (#153, breaking).
• Reject big-endian arrays in many codecs.
• Add skipres parameter to jpeg2k_decode (#155).
• Add bitspersample parameter to htj2k_encode (#153).
• Add bitspersample and color transformation parameter to jpegls_encode (#150).
• Add option to write SPIFF header in jpegls_encode (breaking).
• Add perceptualheuristics parameter to jpegxl_encode (#149).
• Add numthreads parameter to zstd_encode and zstd1_encode.
• Add gainmap_gamma, gainmap_level, and multichannel to ultrahdr_encode.
• Add ultrahdr_encode_jpeg and ultrahdr_decode_jpeg functions.
• Add colorinteropid parameter to exr_encode.
• Add compression level parameter to snappy_encode (require Snappy 1.3).
• Add contentsize parameter to lz4f_encode.
• Add chunked decoder to lz4f_decode, used when content size not in header.
• Add ZSTD and LJ2K compression to EXR codec (require OpenEXR 3.5).
• Add colorspace parameter to qoi_encode.
• Add codec parameter to avif_decode.
• Add numthreads parameter to heif_encode and heif_decode.
• Add rgbe_info function, and orientation field to rgbe_header_info C struct.
• Set GIF background alpha to 0 when alpha channel is present (breaking).
• Set JPEG8 lossless data precision to 16 for uint16 by default.
• Set AVIF encoder default speed to match avifenc (breaking).
• Enable writing lossy monochrome AVIF images.
• Update OPENZL codec to FrameInfo API (require OpenZL 0.3.0).
• Support more pixelformats in jpegxr_decode.
• Avoid copy of non-planar input in jpeg2k_encode.
• Avoid extra copy in CZI hilo unpacking.
• Avoid memset on CLEAR in lzw_encode.
• Improve lzw_decode using literal table.
• Improve inner loops in bmp_encode.
• Improve HTJ2K error handling.
• Use uint64 accumulators in imcd_delta, imcd_xor, and imcd_packints_decode.
• Fix issues in static Pyodide builds.

Changelog

Sourced from imagecodecs's changelog.

2026.10.10

• Reject 0-D input to array codecs (#151, breaking).
• Reject bitspersample outside dtype range (breaking).
• Reject dtype too wide for bitspersample (#153, breaking).
• Reject big-endian arrays in many codecs.
• Add skipres parameter to jpeg2k_decode (#155).
• Add bitspersample parameter to htj2k_encode (#153).
• Add bitspersample and color transformation parameter to jpegls_encode (#150).
• Add option to write SPIFF header in jpegls_encode (breaking).
• Add perceptualheuristics parameter to jpegxl_encode (#149).
• Add numthreads parameter to zstd_encode and zstd1_encode.
• Add gainmap_gamma, gainmap_level, and multichannel to ultrahdr_encode.
• Add ultrahdr_encode_jpeg and ultrahdr_decode_jpeg functions.
• Add colorinteropid parameter to exr_encode.
• Add compression level parameter to snappy_encode (require Snappy 1.3).
• Add contentsize parameter to lz4f_encode.
• Add chunked decoder to lz4f_decode, used when content size not in header.
• Add ZSTD and LJ2K compression to EXR codec (require OpenEXR 3.5).
• Add colorspace parameter to qoi_encode.
• Add codec parameter to avif_decode.
• Add numthreads parameter to heif_encode and heif_decode.
• Add rgbe_info function, and orientation field to rgbe_header_info C struct.
• Set GIF background alpha to 0 when alpha channel is present (breaking).
• Set JPEG8 lossless data precision to 16 for uint16 by default.
• Set AVIF encoder default speed to match avifenc (breaking).
• Enable writing lossy monochrome AVIF images.
• Update OPENZL codec to FrameInfo API (require OpenZL 0.3.0).
• Support more pixelformats in jpegxr_decode.
• Avoid copy of non-planar input in jpeg2k_encode.
• Avoid extra copy in CZI hilo unpacking.
• Avoid memset on CLEAR in lzw_encode.
• Improve lzw_decode using literal table.
• Improve inner loops in bmp_encode.
• Improve HTJ2K error handling.
• Use uint64 accumulators in imcd_delta, imcd_xor, and imcd_packints_decode.
• Fix issues in static Pyodide builds.

Commits

• 5483bfb Release v2026.10.10
• 981b9e5 Update CHANGES.rst
• 8a954aa Update tests/test_imagecodecs.py
• 0c3bf1c Update setup.py
• 6f6cd53 Update imagecodecs/imagecodecs.py
• e8bc98b Update pyproject.toml
• 0a20948 Update imagecodecs/_jpeg2k.pyx
• 68fd862 Update imagecodecs/_pcodec.pyx
• 14ca2a2 Update MANIFEST.in
• d814c42 Update imagecodecs/zarr.py
• Additional commits viewable in compare view

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2026-10-19 02:57:39 UTC