A Histogram Based Approach for Contrast Enhancement
Zardoua Yassir, Boulaala Mohammed
⚠ This is a preprint. It may change before it is accepted for publication.


In this paper, we present a detailed histogram based approach to enhance contrast of images. We aim to stretch the histogram by establishing a mapping function composed of multiple stretching segments (MSS). The slope of each segment is mainly controlled by the probability density of pixels on the range it covers. The use of a maximum number of segments led us to the formula of Global Histogram Equalization (GHE), which is obtained by a different manner. The difference in the approach of GHE and MSS when using the maximum number of segments is explained in detail.