Patent ID: 9542617
Date: 2017-01-10
CPC Classifications: G06K,G06T,H04N

Claim:
1. An image processing method, comprising: deriving a pixel statistical value of pixels and edge information for each of regions in a plurality of layers, the regions including attention pixels and having ranges that are successively narrower; correcting differential information between a pixel statistical value for a first region and a pixel statistical value for a second region by using edge information of the second region, wherein the first region is in an attention layer and the second region is in one of the plurality of layers and is wider than the first region; correcting the pixel statistical value for the first region by using the corrected differential information and the pixel statistical value for the second region; re-correcting the corrected pixel statistical value for the first region by using a pixel statistical value for a third region and differential information between the uncorrected pixel statistical value for the first region and the corrected pixel statistical value for the first region, wherein the third region is a region equal to or wider than the first region and second region; and correcting the attention pixel by repeating the correcting of the pixel statistical value and the re-correcting of the corrected pixel statistical value for the first region sequentially in the respective layers until the first region is reduced from a maximum range to a minimum range.