期刊名称：International Journal of Computer and Information Technology
印刷版ISSN：2279-0764
出版年度：2017
卷号：6
期号：1
页码：55-68
出版社：International Journal of Computer and Information Technology
摘要：A new range of power variable based on the
power law is introduced to enhance low contrast color
photographic images. This variable, at the same time,
removes noise appeared from truncation Y, Cb, Cr
coefficients in the linear transformation of color spaces
RGB into YCbCr . This new interval allows a gradual
return of details hidden in a low contrast image, which
details are often drowned in black who appeared on
silver images due to a bad photo shooting. The study
compares results obtained with the traditional power
law (PL) and the modified power law (MPL) suggested.
Results obtained show that the MPL is very effective in
terms of progressive and finer revelation of hidden
details present on image to be improved. Also, for a clear
improvement of low contrast images, we don’t need to
normalize the grayscales.
关键词：enhancing image; power law; modified power
law; truncation noise; RGB YCbCr and YCbCr RGB
transformations;
