Wikipedia Easy Search

This article's lead section may be too short to adequately summarize the key points. Please consider expanding the lead to provide an accessible overview of all important aspects of the article. (November 2023)

Histogram equalization is a method in image processing of contrast adjustment using the image's histogram.

A histogram which is zero apart from a central area containing strong peaks is transformed by stretching the peaked area to fill the entire x-axis. — Histograms of an image before and after equalization.