Image enhancement methods and systems using the same

摘要

An embodiment of an image enhancement method is introduced for use in an electronic device. An image composed of a plurality of pixel values is first received, and each pixel therein is separated into two channels. The image is further divided into a plurality of blocks. A distribution of a selected channel is determined for each block, which is selected from the two channels. For each pixel, the pixel value of the selected channel is adjusted according to at least one distribution corresponding to at least one neighboring block. For each pixel, the pixel value of the other channel is adjusted according to the adjusted pixel value of the selected channel. As a result, the adjusted image is provided.

主权项

1. An image processing system implemented for processing an image in an electronic device, comprising:
a general-purpose processor that is programmed using microcode or software to partition the image into a plurality of blocks, determine a representative luminance value for each block of the image and assign one of plurality luminance profiles for each block according to the representative luminance value, wherein at least two blocks of the plurality of blocks correspond to different luminance profiles respectively; and receive the luminance profile assignment to each block, and, for each pixel of the image, determine at least one neighboring block for the pixel, determine a distance from the pixel to the neighboring block, and adjust a luminance value of each pixel of the image according to at least one luminance profile of the neighboring block and the distance.