Patent ID: 8836815
Filing Date: 2014-09-16
Classification: H04N

Abstract:
1. An imaging apparatus including a solid state imaging device that includes plural pairs of a first photoelectric conversion element and a second photoelectric conversion element each having different spectral sensitivity characteristics, wherein a wavelength range in which the first photoelectric conversion element of each pair mainly has a spectral sensitivity and a wavelength range in which the second photoelectric conversion element of each pair mainly has a spectral sensitivity fall within a wavelength range of a specific color of a visible light, respectively, the plural pairs includes plural kinds of pairs of which the specific colors are different, and the imaging apparatus has a first mode in which an added signal obtained by adding signals obtained from the first photoelectric conversion element and the second photoelectric conversion element of the pair and corresponded to the pair is processed to generate an image data, and a second mode in which signals obtained from a plurality of first photoelectric conversion elements and a plurality of second photoelectric conversion elements are processed to generate an image data, the imaging apparatus comprising: a memory unit that stores black body locus data indicating a locus of a color change of a black body by a color temperature in a predetermined color space as black body locus data for a first signal obtained from a first group formed with the plurality of first photoelectric conversion elements and black body locus data for a second signal obtained from a second group formed with the plurality of second photoelectric conversion elements, respectively; a color information generating unit that divides the first signal into a plurality of blocks to generate first color information of each block from the first signal of the block, divides the second signal into the plurality of blocks to generate second color information of each block from the second signal of the block, and divides the added signal into the plurality of blocks to generate third color information of each block from the signal of the block; a black body locus data acquiring unit that acquires black body locus data for the added signal; a light source information determining unit that performs during the second mode a first processing of independently determining first light source information on the first signal at the time of imaging and second light source information on the second signal at the time of the imaging on the basis of a distribution of the first color information, the black body locus data for the first signal, a distribution of the second color information, and the black body locus data for the second signal, and performs during the first mode a second processing of determining third light source information on the added signal at the time of the imaging on the basis of a distribution of the third color information and the black body locus data for the added signal; and a white balance gain calculating unit that calculates white balance gains of the first signal and the second signal on the basis of the first light source information and the second light source information and calculates a white balance gain of the added signal on the basis of the third light source information.