Patent ID: 7969479
Filing Date: 2011-06-28
Classification: G01J,H04N

Abstract:
1. A photographing apparatus performing color temperature detection, said photographing apparatus comprising: an image sensor for capturing an image: an interpolation processing unit configured to generate pixel information using an image signal inputted in units of pixel from said image sensor in accordance with a first subject, wherein said pixel information comprises R color information, G color information, and B color information; a conversion unit configured to calculate a three-dimensional coordinate value using said pixel information, said three-dimensional coordinate value consisting of luminance, R-G color difference information, and B-G color difference information; a zone generating unit configured to generate and manage a filtering zone set to include a characteristic curve of said image sensor; and a color temperature determining unit configured to renew an added value, to calculate an average value per color in units of frame, and to determine a compensation rate per color such that an average value per color becomes the same, in case said three-dimensional coordinate value of said pixel is included in said filtering zone, wherein said filtering zone on a plane consisting of an R-G color difference information axis and a B-G color difference information axis, has two slanting side lines, each of said two slanting side lines projects in a first direction from each of two reference points which are on each side, respectively, of said characteristic curve on said R-G color difference information axis and said B-G color difference information axis, and also has two other slanting side lines, each of said two other slanting side lines projects in a second direction from said each of two reference points which are on said each side, respectively, of said characteristic curve on said R-G color difference information axis and said B-G color difference information axis, a slope value of at least one of said two slanting side lines is different from a slope value of at least one of said two other slanting side lines, and each of said two reference points is on said B-G color difference information axis.