U Ú²g†0ãJ@s† dZddlmZddddddd d d dd d ddddd dd ddddd d dddddd d d ddddd d d d d ddd d d d d d dd d d d d d d d d d d d d d g@dddddd d d dddddd d d dddddd d d ddddd d d d dddd d d d d d d d d d d d d d d d d d d d d d d d d d d d d g@gdœdddddd ddddddddd d dddddd d d!d"dddd d d#d"d$d dd d dd%d$d$dd d d#d%d$d$d$dd d!d"d$d$d$d$ddd"d$d$d$d$d$g@d&dd&ddd dd'dd(d d&dd d!dd&d dd)d dd ddd&d)ddddd$ddd ddd'd$d$d d ddd'd*d$d$dd!d dd$d$d$d$d'ddd$d$d$d$d$g@gdœdd+d,d,d+d-dddd,d.d.d+d/d0ddd,d.d.d+d0dd1d(d+d+d+dddd(dd-d/d0ddddddd0ddddddddd1d(ddddddd(dddddg@d2d2ddd dddd2dddddddddd&dddddddddddddd dddddddddddddddddddddddddddddddg@gdœdddddd3d,d.d+ddddd3d,d.d+ddddd,d.d2d-dddd,d.d2d-dd3d3d,d.d/d0ddd,d,d.d2d0dddd.d.d2d-ddddd+d+d-dddddg@d3d3d.d-ddddd3d,d+dd1dddd.d+d-d1ddddd-dd1ddddddd1ddddddddddddddddddddddddddddddg@gdœdd4d4d4d4d4d4d4d4d4d4d4d4d4d4d4d4d4d4d4d4d4d4d4dd4d4d4d4d4d4ddd4d4d4d4d4ddd3d4d4d4d4ddd3d3d4d4d4ddd3d3d3d4d4ddd3d3d3d3g@d4d4d4ddd3d3d3d4d4d4dd3d3d3d3d4d4d4d3d3d3d3d3ddd3d3d3d3d3d3dd3d3d3d3d3d3d3d3d3d3d3d3d3d3d3d3d3d3d3d3d3d3d3d3d3d3d3d3d3d3d3g@gdœdd d1d1ddd!d5d&d1ddd(d d ddd1dd&dd ddddd(dd dddddd d dddddd!d ddddddd5dddddddd&dddddddg@dd(d)dddd&d&d(dd d1d1dddd)d d1d1dddddd1d1ddddddd1ddddddddddddddd&dddddddd&dddddddg@gdœddd/d/dd&ddd&d/d-d-ddd(ddd/d-d0dd(dddddddddddd&dd(ddddddd(ddddddddddddddd&dddddddg@ddddddd&d&dd1d1d1d1ddddd1d1d1dddddd1d1ddddddd1ddddddddddddddd&dddddddd&dddddddg@gdœdd+d,d,d+d-dddd,d.d.d+d/d0ddd,d.d.d+d0dddd+d+d+dddddd-d/d0ddddddd0ddddddddddddddddddddddg@d2d2ddddd&d&d2ddd1d1dddddd1d1dddddd1d1ddddddd1ddddddddddddddd&dddddddd&dddddddg@gdœdddddd3d,d.d+ddddd3d,d.d+ddddd,d.d2d-dddd,d.d2d-dd3d3d,d.d/d0ddd,d,d.d2d0dddd.d.d2d-ddddd+d+d-dddddg@d3d3d.d-ddddd3d,d+d0d1dddd.d+d-d1ddddd-d0d1ddddddd1ddddddddddddddddddddddddddddddg@gdœd6œ Zd7S)8uG JPEG quality settings equivalent to the Photoshop settings. Can be used when saving JPEG files. The following presets are available by default: ``web_low``, ``web_medium``, ``web_high``, ``web_very_high``, ``web_maximum``, ``low``, ``medium``, ``high``, ``maximum``. More presets can be added to the :py:data:`presets` dict if needed. To apply the preset, specify:: quality="preset_name" To apply only the quantization table:: qtables="preset_name" To apply only the subsampling setting:: subsampling="preset_name" Example:: im.save("image_name.jpg", quality="web_high") Subsampling ----------- Subsampling is the practice of encoding images by implementing less resolution for chroma information than for luma information. (ref.: https://en.wikipedia.org/wiki/Chroma_subsampling) Possible subsampling values are 0, 1 and 2 that correspond to 4:4:4, 4:2:2 and 4:2:0. You can get the subsampling of a JPEG with the :func:`.JpegImagePlugin.get_sampling` function. In JPEG compressed data a JPEG marker is used instead of an EXIF tag. (ref.: https://web.archive.org/web/20240227115053/https://exiv2.org/tags.html) Quantization tables ------------------- They are values use by the DCT (Discrete cosine transform) to remove *unnecessary* information from the image (the lossy part of the compression). (ref.: https://en.wikipedia.org/wiki/Quantization_matrix#Quantization_matrices, https://en.wikipedia.org/wiki/JPEG#Quantization) You can get the quantization tables of a JPEG with:: im.quantization This will return a dict with a number of lists. You can pass this dict directly as the qtables argument when saving a JPEG. The quantization table format in presets is a list with sublists. These formats are interchangeable. Libjpeg ref.: https://web.archive.org/web/20120328125543/http://www.jpegcameras.com/libjpeg/libjpeg-3.html é)Ú annotationsééééé'é2é.é>éDééé&é5éAééé é6ééé+éB)Z subsamplingZ quantizationé ééé éé éé#é/é%é@é3éé0ééé?ééé ééé ééééé") Zweb_lowZ web_mediumZweb_highZ web_very_highZ web_maximumÚlowZmediumÚhighÚmaximumN)Ú__doc__Ú __future__rZpresets©r:r:ú3/tmp/pip-unpacked-wheel-xela2va7/PIL/JpegPresets.pyÚsdA ùù÷ÿùù÷ÿùù÷ÿùù÷ÿùù÷ÿùù÷ÿùù÷ÿùù÷ÿùù÷ÿ€ç