Adaptive Image Enhancement Method

摘要

The most important factor affecting the quality of image is the brightness and contrast. In order to improve the brightness and contrast of the image, this paper presents an adaptive image enhancement method. This method sets a threshold value according to the grayscale range of the image. If it is smaller than the threshold value, this paper uses auto gray levels enhancement. While if it is greater than the threshold value, this paper uses weighted gray levels equalization enhancement. Adaptive image enhancement method can not only enhance the low-contrast images, but also can enhance the dark images or the bright images. This method has a good robustness and the enhanced image has a better visual effect.