تحسين تباين الصورة الرقمية باستخدام دالة تحويل خطية

The principal objective of image enhancement is to process a given image so that the result is more suitable than the original image for a specific application. The enhancement doesn’t increase the inherent information content of the data, but it increases the dynamic range of the pixel. The greatest difficulty in image enhancement is quantifying the criterion for enhancement and, therefore, a large number of image enhancement techniques are empirical and require interactive procedures to obtain satisfactory results. The aim of this research is to enhancement the digital image based on the histogram modification techniques by using linear transformation function depended of maps LUT which represent relation between the image intensity values and brightness values. We have depended calculation technique the contrast by statistic characteristics and histogram as criterion for compare.