Abstract
The sharpness of image is one of the important factors in image quality. In most imaging systems, the edge enhancement process is applied to improve the sharpness of the image. In this paper, the dependence of the optimum condition of edge enhancement is studied on the pixel size and the luminance distribution of image by subjective estimation. It is found that the optimum condition shifts to weak edge enhancement side according to the increase of pixel size and the reason of the shift is explained from human visual system, and it is also found that the optimum condition shows the same behavior as above according to the increase of luminance variance.
