Image processing apparatus with a deleting portion, image processing method for deleting image data, and image processing program product with image data deleting function

摘要

An image processing apparatus includes a compression/expansion device capable of compressing and expanding image data in a form of JBIG format, a nonvolatile memory which stores the image data compressed in the form of the JBIG format by the compression/expansion device, a deleting portion which makes image data-to-be-deleted stored in the memory un-restorable by deleting only head data of each plane having restoration information of the data-to-be-deleted.