关键词: 二值化, 阈值, 人类视觉系统, 像素

Abstract: This paper eliminates the image non-uniform brightness using mathematical morphological open operation and obtains the image threshold value according to the Euclidean distance. Standard deviation is used to determine the visual sensitivity coefficient of each pixel according to the human visual characteristics. Image binarization is performed according to the gray value, the image threshold and the visual sensitivity coefficient. This method both can effectively eliminate the ghosts, and can keep the character stroke well. Experimental results show that this method is more effective.

Key words: binarization, threshold, human vision system, pixel