Patent attributes
The present invention provides a white balance adjustment device that is capable of adjusting white balance by estimating a color of a light source with a high degree of accuracy, even for a scene in which an object such as a leaf is present. The white balance adjustment device divides a captured image into a plurality of blocks, and extracts a representative color difference (Tg, Ti) from each block, and a characteristic pixel (Tg0, Ti0) having a maximum color difference in each block. The white balance adjustment device calculates a light source color estimation vector from a representative value pixel and a characteristic pixel for each block, and estimates a convergence point of light source color estimation vectors of the plurality of blocks as the color of the light source used for the input image to adjust the white balance.
