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http://dx.doi.org/10.5573/ieie.2016.53.10.077

Adaptive Retinex Algorithm using Skewness for Contrast Enhancement  

Oh, Jong Geun (Soongsil University)
Hong, Min-cheol (Soongsil University)
Publication Information
Journal of the Institute of Electronics and Information Engineers / v.53, no.10, 2016 , pp. 77-83 More about this Journal
Abstract
This paper presents an adaptive retinex algorithm using skewness for contrast enhancement of color images. In order to estimate the degree of low contrast of an image, skewness of luminance of an observed image is used to define a parameter, and a non-linear function is proposed to compensate the reflectance using the parameter and estimated reflectance. In addition, determination of gain and offset of the non-linear function is addressed using statistics of the estimated reflectance. The relation between an observed luminance and the compensated luminance is used to compensate color components with the reduction of computational cost. The experimental results show that the proposed algorithm has the capability to effectively improve the contrast without color distortion.
Keywords
retinex; contrast enhancement; skewness; non-linear function; color distortion;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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