Patent ID: 8203613

Claim:
An image acquisition apparatus which electronically records an image of a subject, the image acquisition apparatus comprising: an imager in which a color filter is disposed in a front face; a RAW data dividing unit configured to divide RAW data into each identical color, the RAW data being obtained in photographing with the imager; a compression rate control unit configured to enable control of a compression rate for each color in compressing the RAW data divided into each color by the RAW data dividing unit; a compression coding processing unit configured to produce coded data of each color by compressing the RAW data divided into each color by the RAW data dividing unit at the compression rate controlled by the compression rate control unit; a recording unit configured to record the coded data of each color produced by the compression coding processing unit; a RAW format data reproducing unit configured to decode the coded data of each color recorded in the recording unit and reproduce RAW format data from the obtained decoded data; and a motion compensation unit configured to compensate a relative positional relationship between frames by estimating a motion of a subject between frames of a plurality of images using specific color division coded data which is decoded by the RAW format data reproducing unit, the specific color division coded data being coded data of a color close to a peak of spectral sensitivity of human vision in the coded data of each color produced by the compression coding processing unit.