Patent ID: 9501711
Filing Date: 2016-11-22
CPC Classification: G06K,G06T

Claim Text:
1. An image processing method comprising: calculating a pixel statistical value and edge information of pixels for each of areas of a multi-layer, the areas each containing a target pixel and having a successively decreased range; correcting difference information between the pixel statistical value of an area of a specific layer and the pixel statistical value of an area of a layer that is wider than the area of the specific layer using the edge information of the area of the layer that is wider than the area of the specific layer; correcting the pixel statistical value of the area of the specific layer using post-correction difference information and the pixel statistical value of the area of the layer that is wider than the area of the specific layer; recorrecting the post-correction pixel statistical value of the area of the specific layer using difference information between a pre-correction pixel statistical value of the area of the specific layer and the post-correction pixel statistical value of the area of the specific layer and the edge information of the area of the layer that is wider than the area of the specific layer; and correcting the target pixel by repeating correction and recorrection of the pixel statistical value of the area of the specific layer successively in each layer until the area reduces its range from the maximum range to the minimum range.