Aluode/PerceptionLabPortable
0
1o
2 ��YiM1 � @ s� d Z ddlmZ dg d�g d�gd�dg d�g d�gd�dg d �g d3�gd�dg d �g d �gd�dg d
�g d�gd�dg d�g d�gd�dg d�g d�gd�dg d�g d�gd�dg d �g d�gd�d� ZdS )u 4JPEG quality settings equivalent to the Photoshop settings.5Can be used when saving JPEG files.6 7The following presets are available by default:8``web_low``, ``web_medium``, ``web_high``, ``web_very_high``, ``web_maximum``,9``low``, ``medium``, ``high``, ``maximum``.10More presets can be added to the :py:data:`presets` dict if needed.11 12To apply the preset, specify::13 14 quality="preset_name"15 16To apply only the quantization table::17 18 qtables="preset_name"19 20To apply only the subsampling setting::21 22 subsampling="preset_name"23 24Example::25 26 im.save("image_name.jpg", quality="web_high")27 28Subsampling29-----------30 31Subsampling is the practice of encoding images by implementing less resolution32for chroma information than for luma information.33(ref.: https://en.wikipedia.org/wiki/Chroma_subsampling)34 35Possible subsampling values are 0, 1 and 2 that correspond to 4:4:4, 4:2:2 and364:2:0.37 38You can get the subsampling of a JPEG with the39:func:`.JpegImagePlugin.get_sampling` function.40 41In JPEG compressed data a JPEG marker is used instead of an EXIF tag.42(ref.: https://exiv2.org/tags.html)43 44 45Quantization tables46-------------------47 48They are values use by the DCT (Discrete cosine transform) to remove49*unnecessary* information from the image (the lossy part of the compression).50(ref.: https://en.wikipedia.org/wiki/Quantization_matrix#Quantization_matrices,51https://en.wikipedia.org/wiki/JPEG#Quantization)52 53You can get the quantization tables of a JPEG with::54 55 im.quantization56 57This will return a dict with a number of lists. You can pass this dict58directly as the qtables argument when saving a JPEG.59 60The quantization table format in presets is a list with sublists. These formats61are interchangeable.62 63Libjpeg ref.:64https://web.archive.org/web/20120328125543/http://www.jpegcameras.com/libjpeg/libjpeg-3.html65 66� )� annotations� )@� � � �' �2 �. �> �D r � � �& r �5 �A r r r
� r r r r r r r r r r r r r r r r r r r r r r r r r r r r r r67 r r r r r r r r r r r r r r r )@� r � r �6 r r r r � � r r r r r r r r �+ �B r r r r r r r r r r r r r r r r r r r r r r r r r r r r r r r r r r r r r r r r r r r )Z subsamplingZ quantization)@r � r r r
� r � r � r � r r
r
r r r �
r r
� �# �/ r r r r
r �% r! �@ r
r r
r r �3 r# r# r r
r r" r$ r# r# r# r r
r r! r# r# r# r# r r r! r# r# r# r# r# )@� r r% r r r r �0 r � r r% r r r r r% r r � r r r r r r% r( r r r r r# r r r r r r& r# r# r r r r r& �? r# r# r r r r r# r# r# r# r& r r r# r# r# r# r# )@� � r+ r* � r r r r+ � r- r* � �68 r r r+ r- r- r* r/ r � r' r* r* r* r r r r' r r, r. r/ r r r r r r r/ r r r r r r r r r0 r' r r r r r r r' r r r r r )@� r1 r r r r r r r1 r r r r r r r r r r% r r r r r r r r r r r r r r r r r r r r r r r r r r r r r r r r r r r r r r r r r r r r r )@r r r r � r+ r- r* r r r r r2 r+ r- r* r r r r r+ r- r1 r, r r r r+ r- r1 r, r r2 r2 r+ r- r. r/ r r r+ r+ r- r1 r/ r r r r- r- r1 r, r r r r r* r* r, r r r r r )@r2 r2 r- r, r r r r r2 r+ r* r r0 r r r r- r* r, r0 r r r r r, r r0 r r r r r r r0 r r r r r r r r r r r r r r r r r r r r r r r r r r r r r r )@� r3 r3 r3 r3 r3 r3 r3 r3 r3 r3 r3 r3 r3 r3 r3 r3 r3 r3 r3 r3 r3 r3 r r3 r3 r3 r3 r3 r3 r r r3 r3 r3 r3 r3 r r r2 r3 r3 r3 r3 r r r2 r2 r3 r3 r3 r r r2 r2 r2 r3 r3 r r r2 r2 r2 r2 )@r3 r3 r3 r r r2 r2 r2 r3 r3 r3 r r2 r2 r2 r2 r3 r3 r3 r2 r2 r2 r2 r2 r r r2 r2 r2 r2 r2 r2 r r2 r2 r2 r2 r2 r2 r2 r2 r2 r2 r2 r2 r2 r2 r2 r2 r2 r2 r2 r2 r2 r2 r2 r2 r2 r2 r2 r2 r2 r2 r2 )@r r0 r0 r r r �" r% r0 r r r' r r
r r r0 r r% r r
r r r r r' r r
r r r r r r r
r r r r r r r
r r r r r r r4 r r r r r r r r% r r r r r r r )@r r' r( r r r r% r% r' r r
r0 r0 r r r r( r
r0 r0 r r r r r r0 r0 r r r r r r r0 r r r r r r r r r r r r r r r% r r r r r r r r% r r r r r r r )@r r. r. r r% r r r% r. r, r, r r r' r r r. r, r/ r r' r r r r r r r r r r r r% r r' r r r r r r r' r r r r r r r r r r r r r r r% r r r r r r r )@r r r r r r r% r% r r0 r0 r0 r0 r r r r r0 r0 r0 r r r r r r0 r0 r r r r r r r0 r r r r r r r r r r r r r r r% r r r r r r r r% r r r r r r r )@r* r+ r+ r* r, r r r r+ r- r- r* r. r/ r r r+ r- r- r* r/ r r r r* r* r* r r r r r r, r. r/ r r r r r r r/ r r r r r r r r r r r r r r r r r r r r r r )@r1 r1 r r r r r% r% r1 r r r0 r0 r r r r r r0 r0 r r r r r r0 r0 r r r r r r r0 r r r r r r r r r r r r r r r% r r r r r r r r% r r r r r r r )@r2 r2 r- r, r r r r r2 r+ r* r/ r0 r r r r- r* r, r0 r r r r r, r/ r0 r r r r r r r0 r r r r r r r r r r r r r r r r r r r r r r r r r r r r r r ) Zweb_lowZ69web_mediumZweb_highZ
web_very_highZ web_maximum�lowZmedium�high�maximumN)�__doc__�70__future__r Zpresets� r: r: �yE:\DocsHouse\542 percep lab latest\PerceptionLab\PerceptionLab_Portable\python_embed\Lib\site-packages\PIL/JpegPresets.py�<module> sb A������������������ �71�