A method to enhance images based on human vision property

Image information for target detection and recogniton is determined by grayscale value relationship between pixels. The human eye is unable to perceive too small nonzone grayscale value difference.Therefore human eyes may not always perceive the whole image information for target detecting and recognizing. To enhance image information for human detecting and recognizing targets, a method is proposed in this paper to nonlinearly map the grayscale values of pixels in the orignal image to the new grayscale values of pixels in the enhanced image guided by human vision property.