METHOD AND DEVICE FOR IMAGE ENHANCEMENT

摘要

A method and a device for image enhancement are provided. The method according to an embodiment of the present invention comprises calculating a local luminance value and a local contrast value for each pixel in an input digital image; determining a gain factor for each pixel based on the local luminance value and the local contrast value; and adjusting a value of a pixel based on the gain factor determined for the pixel. With the method and device according to the embodiments of the present invention, both luminance and contrast of an image can be enhanced without introducing any artifacts. According to further embodiments, the computational efficiency can be improved. The present invention is applicable in a variety of image processing systems, such as image/video capture device, display device, print device and the like.