Image contrast enhancement with brightness preservation using an optimal gamma correction and weighted sum approach

摘要: The enhancement of image contrast and preservation brightness are two important but conflicting objectives in restoration. Previous attempts based on linear histogram equalization had achieved enhancement, exact was not accomplished. A new perspective is taken here to provide balanced performance simultaneously by casting the quest such solution an optimization problem. Specifically, non-linear gamma correction method adopted enhance contrast, while a weighted sum approach employed for preservation. In addition, efficient golden search algorithm exploited determine required optimal parameters produce enhanced images. Experiments conducted natural colour images captured under various indoor, outdoor illumination conditions. Results have shown that proposed outperforms currently available methods and...