There are 2 repositories under image-contrast-enhancement topic.
Python implementation of "A New Image Contrast Enhancement Algorithm Using Exposure Fusion Framework", CAIP2017
C++ implementation of several image contrast enhancement techniques.
This module attempts to enhance contrast of a given image by equalizing its two dimensional histogram.
Melhoria de contraste em imagens de nível de cinza utilizando o otimizador BMO com equalizador de histograma.