There are many techniques of image enhancement. Their parameters are traditionally tuned by maximization of SNR\ncriterion, which is unfortunately based on the knowledge of an ideal image. Our approach is based on Hartley\nentropy, its estimation, and differentiation. Resulting gradient of entropy is estimated without knowledge of ideal\nimages, and it is a subject of minimization. Both SNR maximization and gradient magnitude minimization cause\nvarious settings of the given filter. The optimum settings are compared, and their differences are discussed
Loading....