Patent ID: 8406541

Claim:
An image processing device comprising: a control unit configured to receive a user's selection of a part of a source area of an image to be checked for image focus; a first expansion unit which cuts and expands the part of the source area of first compression image data compressed in a first predetermined area as a unit of compression to produce first expansion part data; a second expansion unit which cuts and expands a part of a destination area of second compression image data compressed in a second predetermined area as a unit of compression to produce second expansion part data; a cutting unit which cuts data corresponding to the part of the source area from the first expansion part data; a first producing unit which produces third expansion part data by writing the cut data corresponding to the source area on the destination area of the second expansion part data; and a second producing unit which combines the second compression image data and compressed part data produced by compressing the third expansion part data in the second predetermined area as a unit of compression to produce third compression image data, wherein the destination area is a magnified portion of the part of the source area of the image that is selected by the user.