Patent ID: 9451226
Filing Date: 2016-09-20
CPC Classification: H04N

Claim Text:
1. A white balance method for performing a shading compensation, the method comprising: executing, using at least one processor, a white balance for adjusting a color temperature of an input image; extracting, using the at least one processor, a shading gain table corresponding to the color temperature among pre-stored shading gain tables for each color temperature by using an average value for corresponding a reference point on the color temperature of a selected valid white block that corresponds to a predetermined white frame among M blocks divided from the input image; executing a shading compensation for an image for each block of the input image by applying an average RGB value of the selected valid white block of the extracted shading gain table; and terminating the white balance, wherein the executing of the shading compensation comprises: calculating a reference R gain value and a reference B gain value based on the RGB average value of the valid white block for the input image; calculating an R gain value and a B gain value for each block by applying the reference R gain value and the reference B gain value to the shading gain table; dividing the R gain value and the B gain value for each block to a Y signal and a C signal; and executing a shading compensation for at least one of the Y signal and the C signal.