Patent ID: 7865023
Filing Date: 2011-01-04
Classification: H04N

Abstract:
1. A digital still camera which compresses image data for recording, the image data representing a digital still image photographed by a photographing unit, the digital still camera comprising: a first compression unit which compresses inputted image data, using a predetermined first compression parameter; a second compression unit which compresses said inputted image data, using a second compression parameter different from said first compression parameter; an evaluating unit which evaluates compression results of said first compression unit and of said second compression unit based on a relationship between the compression results and a predetermined range including a target size of compressed data; and a selecting unit which selectively performs recording processing to a compression result highly evaluated by said evaluating unit, wherein: said first compression unit performs compression processing to image data obtained by said photographing unit, using a standard compression parameter with which image data of a standard image with a standard amount of information is compressed to obtain compressed data of said target size; and said second compression unit performs compression to image data obtained by said photographing unit, using a compression parameter corresponding to a predetermined auxiliary scale factor, the auxiliary scale factor being equal to or larger than a standard scale factor corresponding to said standard compression parameter and smaller than a maximum scale factor which corresponds to a compression parameter with which said standard image is compressed to obtain compressed data of a size corresponding to a lower limit of a predetermined range including said target size.