1.0.1

What is new?

• Added libjpeg 9f.

Improvements

Bugfixes

• Fixed source distribution by improving the manifest.

1.0.0

What is new?

• The first release that is labelled production/stable!
• Functionally the same as 0.14.0.

Improvements

• Replaced copyright statement, and file docstrings.

Bugfixes

0.14.0

What is new?

• extended flags for mozjpeg
  • TRELLIS_QUANT
  • TRELLIS_QUANT_DC
  • TRELLIS_Q_OPT
  • USE_SCANS_IN_TRELLIS
  • OVERSHOOT_DERINGING
• added support for Cygwin/Windows
• jpeglib.from_dct() now accepts integer QF

Improvements

• documentation improved (factor table, FAQs)
• added version-specific unit-test runs to some tests
• extended internal interface to be able to further add new flags

Bugfixes

• fixed J : a : b notation implementation, Jab_to_factors()

0.13.1

What is new?

Improvements

• added documentation for Huffman and Script
• extended documentation glossary for samp_factor

Bugfixes

0.13.0

What is new?

(compared to 0.12.0)

• Integrated operations with Huffman table

jpeg = jpeglib.read_dct('cover.jpeg')
jpeg.huffmans

• Removed unrolling of quantization table, standard JPEG has now 2 QTs

• Added mozjpeg flags

im.write_spatial('out.jpeg', flags=['+TRELLIS_QUANT', '+TRELLIS_QUANT_DC'])

(compared to 0.12.1+)

• Integrated operations with scan script and progressive JPEG

im = jpeglib.read_spatial('cover.jpeg', buffered=True)
im.scans

• unittests on Windows separated from Linux

Improvements

• CStruct classes are now enums

im = jpeglib.read_spatial("cover.jpeg", jpeglib.Colorspace.JCS_YCbCr)

• The enum values are also added to the global level

im = jpeglib.read_spatial("cover.jpeg", jpeglib.JCS_YCbCr)

• dct_method and dither_mode are now parameters of writing, and not internal parameters
• added comp_info into DCTJPEGio envelope with JPEG metadata

Bugfixes

• Fixed from_spatial dtype conversion
• Fixed custom QT sigsegv occurring in libjpeg 9d+
• Fixed inference of grayscale JPEG quant_tbl_no
• Fixed inference of sampling factor (incorrect rounding)
• Sanitized invalid QF values, clipping and warning now

0.12.8

What is new?

• added ComponentInfo class to even closer emulate the interface of jpegio

Improvements

Bugfixes

0.12.7

What is new?

Improvements

Bugfixes

• fixed closing of file handles in the cjpeglib on error (#8 )
• fixed sampling factor rounding (#9 )

0.12.6

What is new?

Improvements

• better inference of quant_tbl_no in compression procedure

Bugfixes

• fixed doc building, broken with the chroma sampling factors
• removed format strings to be able to use jpeglib in Python 3.7

0.12.5

What is new?

Improvements

• better documentation for chroma sampling factors

Bugfixes

• load() does not update components that have been initialized on unloaded object

0.12.4

What is new?

• added flags for Trellis Quantization (only for mozjpeg 3.0.0 and above)

jpeglib.version.set('mozjpeg300')
jpeg = jpeglib.read_spatial('input.jpeg')
jpeg.write_spatial('output.jpeg', flags=['+TRELLIS_QUANT','+TRELLIS_QUANT_DC'])

Improvements

• removed DCT method and dither mode from JPEG objects
• increased flag representation to 64 bits (limit increased from 16 to 32 flags)

Bugfixes