Contrast Enhancement with Reshaping Local Histogram using Weighting Method
Jatinder K. Kaur · IOSR Journal of Engineering · 2012
In this paper, a new and efficient algorithm for reshaping of histogram that is capable in enhancing local details as well as properly preserving the image brightness is presented.When residual bad pixels exist in the image, the dynamic range of the scene will be heavily suppressed when it displayed on a regular monitor.The proposed method is reduced the dynamic range compression (DRC) and improve the dynamic range and contrast.The proposed algorithm also works on zero frequency components that exist sometimes in the original histogram, and they can enhance the contrast by redistributing the original gray scales uniformly onto full Gray scale range.The dynamic range of the image is much improved after proposed method and the details hidden in the original image are enhanced.Simulation results show the efficient performance of proposed weighting method in terms of Entropy and EME.