New image evaluation method and its application

Image encryption and hiding effect evaluation standard is used in image encryption and hiding algorithm widely. In order to evaluate the effect of image encryption and hiding fleetly and effectually, new image encryption and hiding effect evaluation indexes are presented based on probability of pixel's neighborhood. Simulation results show that the new method is simple and approach to man's subjective results. At the same time, a new image edge detection algorithm is presented using the evaluation indexes. Simulation results show that our method is simple and better effect can be got.