颜色正确

作者：Shunsuke Aihara-http://argmax.jp

日期：February 2012

说明：Imprement some of color correction algorithms

要求：python2.6 or later

numpy

Pillow

安装：% python setup.py build

% python setup.py install

弹劾算法：gray world

colorcorrect.algorithm.gray_world

usage: image

max white

colorcorrect.algorithm.max_white

usage: image

stretch

colorcorrect.algorithm.stretch

usage: image

retinex

colorcorrect.algorithm.retinex

usage: image

retinex with adjust

colorcorrect.algorithm.retinex_with_adjust

usage: image

standard deviation weighted grey world

colorcorrect.algorithm.standard_deviation_weighted_grey_world

usage: image,subblock width(default:20), subblock height(default:20)

standard deviation and luminance weighted gray world

colorcorrect.algorithm.standard_deviation_and_luminance_weighted_gray_world

usage: image,subblock width(default:20), subblock height(default:20)

luminance weighted gray world

colorcorrect.algorithm.luminance_weighted_gray_world

usage: image,subblock width(default:20), subblock height(default:20)

automatic color equalization

colorcorrect.algorithm.automatic_color_equalization

usage: image,slope(default:10),limit(default:1000)

示例用法：>>> import Image

>>> import colorcorrect.algorithm as cca

>>> from colorcorrect.util import from_pil, to_pil

>>> img = Image.open('/path/to/image')

>>> to_pil(cca.stretch(from_pil(img))).show()

参考文献：Denis. Nikitenko, M. Wirth and K. Trudel, "Applicability Of White-Balancing Algorithms to Restoring Faded Colour Slides: An Empirical Evaluation.", Journal of Multimedia, vol. 3, no. 5, 2008.

HK. Lam, OC. Au and CW. Wong, "Automatic white balancing using luminance component and standard deviation of RGB components", in Proc. ICASSP, 2004.

A. Rizzi, C. Gatta and D. Marini, "A new algorithm for unsupervised global and local color correction.", Pattern Recognition Letters, vol. 24, no. 11, 2003.

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