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Revisions

2024.9.22

  • Pass 7644 tests.
  • Use libjpeg-turbo for all Lossless JPEG bit-depths if possible (#105).
  • Fix PackBits encoder fails to skip short replication blocks (#107).
  • Fix JPEG2K encoder leaving trailing random bytes (#104).
  • Fix encoding and decoding JPEG XL with custom bitspersample (#102).
  • Improve error handling in lzf_decode (#103).
  • Add Ultra HDR (JPEG_R) codec based on libultrahdr library (#108).
  • Add JPEGXS codec based on libjxs library (source only).
  • Add SZ3 codec based on SZ3 library.
  • Deprecate Python 3.9, support Python 3.13.

2024.6.1

  • Fix segfault in sperr_decode.
  • Fix segfault when strided-decoding into buffers with unexpected shapes (#98).
  • Fix jpeg2k_encoder output buffer too small (#101).
  • Add PCODEC codec based on pcodec library.
  • Support NumPy 2.

2024.1.1

  • Add 8/24-bit BMP codec.
  • Add SPERR codec based on SPERR library.
  • Add LZO decoder based on lzokay library.
  • Add DICOMRLE decoder.
  • Enable float16 in CMS codec.
  • Enable MCT for lossless JPEG2K encoder (#88).
  • Ignore pad-byte in PackBits decoder (#86).
  • Fix heif_write_callback error message not set.
  • Require lcms2 2.16 with issue-420 fixes.
  • Require libjxl 0.9, libaec 1.1, Cython 3.

2023.9.18

  • Rebuild with updated dependencies fixes CVE-2024-4863.

2023.9.4

  • Map avif_encode level parameter to quality (breaking).
  • Support monochrome images in avif_encode.
  • Add numthreads parameter to avif_decode (fix imread of AVIF).
  • Add quantize filter (BitGroom, BitRound, GBR) via nc4var.c.
  • Add LZ4H5 codec.
  • Support more BCn compressed DDS fourcc types.
  • Require libavif 1.0.

2023.8.12

  • Add EER (Electron Event Representation) decoder.
  • Add option to pass initial value to crc32 and adler32 checksum functions.
  • Add fletcher32 and lookup3 checksum functions via HDF5's h5checksum.c.
  • Add Checksum codec for numcodecs.

2023.7.10

  • Rebuild with optimized compile flags.

2023.7.4

  • Add BCn and DDS decoder via bcdec library.
  • Add functions to transcode JPEG XL to/from JPEG (#78).
  • Add option to decode select frames from animated WebP.
  • Use legacy JPEG8 codec when building without libjpeg-turbo 3 (#65).
  • Change blosc2_encode defaults to match blosc2-python (breaking).
  • Fix segfault writing JPEG2K with more than 4 samples.
  • Fix some codecs returning bytearray by default.
  • Fully vendor cfitsio's ricecomp.c.
  • Drop support for Python 3.8 and numpy < 1.21 (NEP29).

2023.3.16

  • Require libjpeg-turbo 2.1.91 (3.0 beta) and c-blosc2 2.7.1.
  • Add experimental type hints.
  • Add SZIP codec via libaec library.
  • Use Zstd streaming API to decode blocks with unknown decompressed size.
  • Remove unused level, index, and numthreads parameters (breaking).
  • Make AEC and BLOSC constants enums (breaking).
  • Capitalize numcodecs class names (breaking).
  • Remove JPEG12 codec (breaking; use JPEG8 instead).
  • Encode and decode lossless and 12-bit JPEG with JPEG8 codec by default.
  • Remove JPEGSOF3 fallback in JPEG codec.
  • Fix slow IFD seeking with libtiff 4.5.
  • Fixes for Cython 3.0.

2023.1.23

  • Require libjxl 0.8.
  • Change mapping of level to distance parameter in jpegxl_encode.
  • Add option to specify bitspersample in jpegxl_encode.
  • Add option to pass de/linearize tables to LJPEG codec.
  • Fix lj92 decoder for SSSS=16 (#59).
  • Prefer ljpeg over jpegsof3 codec.
  • Add option to specify AVIF encoder codec.
  • Support LERC with Zstd or Deflate compression.
  • Squeeze chunk arrays by default in numcodecs image compression codecs.

2022.12.24

  • Fix PNG codec error handling.
  • Fix truncated transferfunctions in cms_profile (#57).
  • Fix exceptions not raised in cdef functions not returning Python object.

2022.12.22

  • Require libtiff 4.5.
  • Require libavif 0.11.
  • Change jpegxl_encode level parameter to resemble libjpeg quality (breaking).
  • Add LZFSE codec via lzfse library.
  • Add LZHAM codec via lzham library.
  • Fix AttributeError in cms_profile (#52).
  • Support gamma argument in cms_profile (#53).
  • Raise limit of TIFF pages to 1048576.
  • Use libtiff thread-safe error/warning handlers.
  • Add option to specify filters and strategy in png_encode.
  • Add option to specify integrity check type in lzma_encode.
  • Fix DeprecationWarning with NumPy 1.24.
  • Support Python 3.11 and win-arm64.

2022.9.26

  • Support JPEG XL multi-channel (planar grayscale only) and multi-frame.
  • Require libjxl 0.7.
  • Switch to Blosc2 API and require c-blosc 2.4 (breaking).
  • Return LogLuv encoded TIFF as float32.
  • Add RGBE codec via rgbe.c.

2022.8.8

  • Drop support for libjpeg.
  • Fix encoding JPEG in RGB color space.
  • Require ZFP 1.0.

2022.7.31

  • Add option to decode WebP as RGBA.
  • Add option to specify WebP compression method.
  • Use exact lossless WebP encoding.

2022.7.27

  • Add LZW encoder.
  • Add QOI codec via qoi.h (#37).
  • Add HEIF codec via libheif (source only; #33).
  • Add JETRAW codec via Jetraw demo (source only).
  • Add ByteShuffle codec, a generic version of FloatPred.
  • Replace imcd_floatpred by imcd_byteshuffle (breaking).
  • Use bool type in imcd (breaking).

2022.2.22

  • Fix jpeg numcodecs with tables (#28).
  • Add APNG codec via libpng-apng patch.
  • Add lossless and decodingspeed parameters to jpegxl_encode (#30).
  • Add option to read JPEG XL animations.
  • Add dummy numthreads parameter to codec functions.
  • Set default numthreads to 1 (disable multi-threading).
  • Drop support for Python 3.7 and numpy < 1.19 (NEP29).

2021.11.20

  • Fix testing on pypy and Python 3.10.

2021.11.11

  • Require libjxl 0.6.x.
  • Add CMS codec via Little CMS library for color space transformations (WIP).
  • Add MOZJPEG codec via mozjpeg library (Windows only).
  • Add SPNG codec via libspng library.
  • Rename avif_encode maxthreads parameter to numthreads (breaking).
  • Accept n-dimensional output in non-image numcodecs decoders.
  • Support masks in LERC codec.
  • Support multi-threading and planar format in JPEG2K codec.
  • Support multi-resolution, MCT, bitspersample, and 32-bit in jpeg2k encoder.
  • Change jpeg2k_encode level parameter to fixed quality psnr (breaking).
  • Change jpegxl_encode effort parameter default to minimum 3.
  • Change JPEG encoders to use YCbCr for RGB images by default.
  • Replace lerc_encode planarconfig with planar parameter (breaking).
  • Add option to specify omp numthreads and chunksize in ZFP codec.
  • Set default numthreads to 0.
  • Fix Blosc default typesize.
  • Fix segfault in jpegxl_encode.
  • Replace many constants with enums (breaking).

2021.8.26

  • Add BLOSC2 codec via c-blosc2 library.
  • Require LERC 3 and libjxl 0.5.
  • Do not exceed literal-only size in PackBits encoder.
  • Raise ImcdError if output is insufficient in PackBits codecs (breaking).
  • Raise ImcdError if input is corrupt in PackBits decoder (breaking).
  • Fix delta codec for non-native byteorder.

2021.7.30

  • Support more dtypes and axes argument in PackBits encoder.
  • Fix worst case output size in PackBits encoder.
  • Fix decoding AVIF created with older libavif.
  • Fix decoding GIF with disposal to previous for first frame.
  • Add lossless option in jpeg_encode.

2021.6.8

  • Fix building with Cython 0.3a7.
  • Decode TIFF with JPEG compression, YCBCR or CMYK colorspace as RGB24.
  • Vendor cfitsio/ricecomp.c for shared library builds on Windows (#18).

2021.5.20

  • Add ZLIBNG codec via zlib-ng library.
  • Add RCOMP (Rice) codec via cfitsio library.
  • Fix decoding of 16-bit JPEG with jpeg_decode.
  • Relax user provided output array shape requirement.

2021.4.28

  • Change WebP default compression level to lossless.
  • Rename jpegxl codec to brunsli (breaking).
  • Add new JPEG XL codec via jpeg-xl library.
  • Add PGLZ codec via PostgreSQL's pg_lzcompress.c.
  • Update to libtiff 4.3 and libjpeg-turbo 2.1.
  • Enable JPEG 12-bit codec in manylinux wheels.
  • Drop manylinux2010 wheels.

2021.3.31

  • Add numcodecs compatible codecs for use by Zarr (experimental).
  • Support separate JPEG header in jpeg_decode.
  • Do not decode JPEG LS and XL in jpeg_decode (breaking).
  • Fix ZFP with partial header.
  • Fix JPEG LS tests (#15).
  • Fix LZ4F contentchecksum.
  • Remove blosc Snappy tests.
  • Fix docstrings.

2021.2.26

  • Support X2 and X4 floating point predictors (found in DNG).

2021.1.28

  • Add option to return JPEG XR fixed point pixel types as integers.
  • Add LJPEG codec via liblj92 (alternative to JPEGSOF3 codec).
  • Change zopfli header location.

2021.1.11

  • Fix build issues (#7, #8).
  • Return bytearray instead of bytes on PyPy.
  • Raise TypeError if output provided is bytes (breaking).

2021.1.8

  • Add float24 codec.
  • Update copyrights.

2020.12.24

  • Update dependencies and build scripts.

2020.12.22

  • Add AVIF codec via libavif.
  • Add DEFLATE/Zlib and GZIP codecs via libdeflate.
  • Add LZ4F codec.
  • Add high compression mode option to lz4_encode.
  • Convert JPEG XR 16 and 32-bit fixed point pixel types to float32.
  • Fix JPEG 2000 lossy encoding.
  • Fix GIF disposal handling.
  • Remove support for Python 3.6 (NEP 29).

2020.5.30

  • Add LERC codec via ESRI's lerc library.
  • Enable building JPEG extensions with libjpeg >= 8.
  • Enable distributors to modify build settings.

2020.2.18

  • Fix segfault when decoding corrupted LZW segments.
  • Work around Cython raises AttributeError when using incompatible numpy.
  • Raise ValueError if in-place decoding is not possible (except floatpred).

2020.1.31

  • Add GIF codec via giflib.
  • Add TIFF decoder via libtiff.
  • Add codec_check functions.
  • Fix formatting libjpeg error messages.
  • Use xfail in tests.
  • Load extensions on demand on Python >= 3.7.
  • Add build options to skip building specific extensions.
  • Split imagecodecs extension into individual extensions.
  • Move shared code into shared extension.
  • Rename imagecodecs_lite extension and imagecodecs C library to 'imcd'.
  • Remove support for Python 2.7 and 3.5.

2019.12.31

  • Fix decoding of indexed PNG with transparency.
  • Last version to support Python 2.7 and 3.5.

2019.12.16

  • Add Zopfli codec.
  • Add Snappy codec.
  • Rename j2k codec to jpeg2k.
  • Rename jxr codec to jpegxr.
  • Use Debian's jxrlib.
  • Support pathlib and binary streams in imread and imwrite.
  • Move external C declarations to pxd files.
  • Move shared code to pxi file.
  • Update copyright notices.

2019.12.10

  • Add version functions.
  • Add Brotli codec.
  • Add optional JPEG XL codec via Brunsli repacker.

2019.12.3

  • Sync with imagecodecs-lite.

2019.11.28

  • Add AEC codec via libaec.
  • Do not require scikit-image for testing.
  • Require CharLS 2.1.

2019.11.18

  • Add bitshuffle codec.
  • Fix formatting of unknown error numbers.
  • Fix test failures with official python-lzf.

2019.11.5

  • Rebuild with updated dependencies.

2019.5.22

  • Add optional YCbCr chroma subsampling to JPEG encoder.
  • Add default reversible mode to ZFP encoder.
  • Add imread and imwrite helper functions.

2019.4.20

  • Fix setup requirements.

2019.2.22

  • Move codecs without 3rd-party C library dependencies to imagecodecs_lite.

2019.2.20

  • Rebuild with updated dependencies.

2019.1.20

  • Add more pixel formats to JPEG XR codec.
  • Add JPEG XR encoder.

2019.1.14

  • Add optional ZFP codec via zfp library.
  • Add numpy NPY and NPZ codecs.
  • Fix some static codechecker errors.

2019.1.1

  • Update copyright year.
  • Do not install package if Cython extension fails to build.
  • Fix compiler warnings.

2018.12.16

  • Reallocate LZW buffer on demand.
  • Ignore integer type output arguments for codecs returning images.

2018.12.12

  • Enable decoding of subsampled J2K images via conversion to RGB.
  • Enable decoding of large JPEG using patched libjpeg-turbo.
  • Switch to Cython 0.29, language_level=3.

2018.12.1

  • Add J2K encoder (WIP).
  • Use ZStd content size 1 MB if it cannot be determined.
  • Use logging.warning instead of warnings.warn or print.

2018.11.8

  • Decode LSB style LZW.
  • Fix last byte not written by LZW decoder (bug fix).
  • Permit unknown colorspaces in JPEG codecs (e.g. CFA used in TIFF).

2018.10.30

  • Add JPEG 8-bit and 12-bit encoders.
  • Improve color space handling in JPEG codecs.

2018.10.28

  • Rename jpeg0xc3 to jpegsof3.
  • Add optional JPEG LS codec via CharLS.
  • Fix missing alpha values in jxr_decode.
  • Fix decoding JPEG SOF3 with multiple DHTs.

2018.10.22

  • Add Blosc codec via libblosc.

2018.10.21

  • Builds on Ubuntu 18.04 WSL.
  • Include liblzf in srcdist.
  • Do not require CreateDecoderFromBytes patch to jxrlib.

2018.10.18

  • Improve jpeg_decode wrapper.

2018.10.17

  • Add JPEG SOF3 decoder based on jpg_0XC3.cpp.

2018.10.10

  • Add PNG codec via libpng.
  • Add option to specify output colorspace in JPEG decoder.
  • Fix Delta codec for floating point numbers.
  • Fix XOR Delta codec.

2018.9.30

  • Add LZF codec via liblzf.

2018.9.22

  • Add WebP codec via libwebp.

2018.8.29

  • Add PackBits encoder.

2018.8.22

  • Add link library version information.
  • Add option to specify size of LZW buffer.
  • Add JPEG 2000 decoder via OpenJPEG.
  • Add XOR Delta codec.

2018.8.16

  • Link to libjpeg-turbo.
  • Support Python 2.7 and Visual Studio 2008.

2018.8.10

  • Initial alpha release.
  • Add LZW, PackBits, PackInts and FloatPred decoders from tifffile.c module.
  • Add JPEG and JPEG XR decoders from czifile.pyx module.
  • …