COPYING APPARATUS

摘要

PROBLEM TO BE SOLVED: To provide a copying apparatus which prevents a latent image from being lacked without a user's intention in the case that a draft which has been ground-tint-processed for preventing a copy is copied. SOLUTION: An image processing to extract the latent image for preventing the copy is applied to a first image data acquired by reading the draft and to a second image data acquired by reading a paper which has formed an image based on the first image data, and it is judged whether both of the image data are the same or not by comparing the first image data with the second image data after the image processing is applied. COPYRIGHT: (C)2008,JPO&INPIT