فحص تباين صورة اختبارية لشدات اضاءة وترددات مكانية مختلفة

Abstract

The most important details of the image and information to be contained in the edges, but most of the criteria for evaluating the image contrast doesn't depend on the quality of edges in the image and measuring the sharpness .It relies assessment general variation or homogenous regions of the image evaluation. So, guide us in our research to evaluate the image based on the calculation of the contrast in the edge image regions. Also, study the impact of intensity of the lighting during filming, the quality of the image to their different regions .Results showed that the contrast of the image edges decrease with illumination decreases and with increasing in image spatial frequency.