TITLE:
Enhancement Technique of Image Contrast using New Histogram Transformation
AUTHORS:
Wanhyun Cho, Seongchae Seo, Jinho You, Soonja Kang
KEYWORDS:
Image Preprocessing Technique; Contrast Enhancement; Histogram Equalization and Specification; Target Distribution Function
JOURNAL NAME:
Journal of Computer and Communications,
Vol.2 No.2,
January
10,
2014
ABSTRACT:
This paper presents a preprocessing technique that can provide the
improved quality of image robust to illumination changes. First, in order to
enhance the image contrast, we proposed new adaptive histogram transformation
combining histogram equalization and histogram specification. Here, by
examining the characteristic of histogram distribution shape, we determine the
appropriate target distribution. Next, applying the histogram equalization with
an image histogram, we have obtained the uniform distribution of pixel values,
and then we have again carried out the histogram transformation using an
inverse of target distribution function. Finally we have conducted various
experiments that can enhance the quality of image by applying our method with
various standard images. The experimental results show that the proposed method
can achieve moderately good image enhancement results.