To provide a gradation correction device capable of performing such gradation correction as providing an image of good quality with no degradation of contrast, for accommodating a dynamic range which is wider than the dynamic range in a post process within the dynamic range of the post process.
The gradation correction device comprises a solid-state imaging element 102 which accepts the input of a photographed image, a brightness border generating part 1102 which generates a border for dividing the photographed image that has been inputted through the solid-state imaging element 102 into a plurality of regions based on brightness, a brightness contour extracting part 1103 that extracts the contour of an object from the photographed image inputted through the solid-state imaging element 102, a split region generating part 1115 that generates a plurality of split regions, provided by dividing the photographed image based on the border generated by the brightness border generating part 1102 and the contour extracted by the brightness contour extracting part 1103, and gradation correction parts 111 and 112 for performing gradation correction for each split region generated by the split region generating part 1115.
COPYRIGHT: (C)2007,JPO&INPIT
Koji Morita
Mamoru Suzuki