Patent ID: 8547388
Filing Date: 2013-10-01
Classification: G09G

Abstract:
1. An image processing method, comprising: respectively adjusting a plurality of original luminance values respectively corresponding to a plurality of pixels in a plurality of blocks of an image among an input image stream according to exposure of the image to generate a plurality of luminance values, comprising: generating a plurality of block luminance values respectively corresponding to the plurality of blocks of the image according to the plurality of luminance values respectively corresponding to the plurality of pixels in the plurality of blocks; configuring each block in the plurality of blocks whose block luminance value is greater than an upper luminance threshold as a light part block; configuring each block in the plurality of blocks whose block luminance value is smaller than a lower luminance threshold as a dark part block; discarding the block luminance value of each block that is neither a light part block nor a dark part block; performing a weighted average calculation upon at least one block luminance value corresponding to a light part block and at least one block luminance value corresponding to a dark part block to generate a first characteristic luminance value; and determining a second characteristic luminance value corresponding to the image according to the plurality of luminance values respectively corresponding to the plurality of pixels of the plurality blocks of the image; and utilizing a determining circuit to determine an ambient luminance value according to the first and second characteristic luminance values.