Patent ID: 8422067
Filing Date: 2013-04-16
Classification: G03G

Abstract:
1. An image forming apparatus comprising, an image data reading section that reads image data formed on a document, an image processing section configured to separate regions where effective information is present from the read image data so as to determine, for every separated region, a shape of a see-through prevention pattern and a position at which the see-through prevention pattern is to be formed; an image printing section that prints the see-through prevention pattern only at a corresponding part on a back surface of a recording sheet on which the document is printed, on the basis of the determined shape and position of the see-through prevention pattern, the corresponding part corresponding to any of the regions where the effective information of the document is present, wherein the see-through prevention pattern prevents, when printed on the back surface of the recording sheets, the effective information printed on the front surface from being seen when the recording sheet is transilluminated.