| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To suppress deterioration in resolution caused by image compression while lowering response to a motion of a subject by enhancing the detection accuracy of motion compensation at a center part on a screen frame by increasing/reducing a set value during image compression on the basis of distortion aberration characteristic information belonging to a superwide-angle lens and performing image compression so as to quickly track the motion of the subject while the detection accuracy of the motion compensation is lowered at a peripheral part on the screen frame. <P>SOLUTION: In this camera image compression processor, a memory 4c divides an area in a block unit in compression coding processing with respect to a screen frame, and distortion aberration characteristic data of the superwide-angle lens 1 stepped on the basis of a selection range in motion compensation frame prediction is stored in advance in each divided area. An image compression circuit 4b sets the detection accuracy of motion compensation in motion compensation frame prediction lower to perform compression coding processing as the position of a coding target block is located closer to an area position of the peripheral part than the center part of the screen frame on the basis of a control signal from the CPU 4d, generated distortion aberration characteristic data corresponding to the position of a divided area in the screen frame of a coding target block of image data. <P>COPYRIGHT: (C)2008,JPO&INPIT</p> |
