kilikkuo / python_colormanagement

Try to do color management by PyOpenCL

Python_ColorManagement

GOAL : Make a color management system in python and improve performance by PyOpenCL

Stage

1. To implement RGB_XYZ color space transformation via python

• Need to obtain image metadata. [options] 1) python module "exifread". 2) python module "PIL". 3) cross-platform executable "exiftool" under ./Image-ExifTool-10.15/ Downloaded from http://www.sno.phy.queensu.ca/~phil/exiftool/index.html 4) a JPEGMetadataParser via python https://github.com/kilikkuo/JPEGMetadataParser

• Need to define all required transformation matrics. http://www.brucelindbloom.com/index.html?Eqn_RGB_XYZ_Matrix.html

• See RGB_XYZ.py / ColorChannelInst.py / EXIF_ColorProfileParser.py

2. Implement algorithm of stage 1 via OpenCL kernel function.

• See cmm.json / temp_algorithm.c

3. Bridge 2 via kernel-mapper (A tool to simplify the use of PyOpenCL)

• https://goo.gl/nSyWz8

Images used under ./images/ are copied & modified (for programming test) from

https://www.flickr.com/photos/boston_public_library/8102625287/in/photostream/ http://dev.exiv2.org/attachments/download/820/Reagan.jpg http://www.myriad-online.com/cgi-bin/bbs/YaBB.pl?board=galerie;action=display;num=1141256379

Prepare dependences after clone

$> git submodule init $> git submodule update

Usage

e.g.

1. $> python demo.py --help
2. $> python demo.py -i PATH_TO_INPUT -ocs sRGB -owp D65
3. $> python demo.py -i PATH_TO_INPUT -ocs ProPhotoRGB -owp D50 -o PATH_TO_OUTPUT