Image generating device

摘要

An image generating device can be used for identifying a special document or a blocked document, the copying of which is prohibited by law, and it can be prevented that such a document is reproduced. The device can accurately identify all blocked documents and all normal documents including blocked documents without images which are in the infrared band and conventional documents with such images. Furthermore, the device can accurately identify blocked and prohibited documents without wasting time since it carries out a decision on the basis of the type of a blocked document which has previously been input.