To provide a means for reducing erroneous judgement due to back-surface reflection of an image formed on a first surface, regarding a recording medium with images formed on the first and second surfaces thereof in accordance with image data, in a device for inspecting whether the image formed on the second surface is correctly formed, through the use of image data formed by reading the second surface of the recording medium.
Upon a collation between second-surface formation image data used at forming the image on the second surface of the paper by means of the image forming part 124 and second-surface read image data formed by reading the second surface of the paper by means of the image reading part 125, a control unit 120 of the data processor 12 is configured to use a threshold of a density difference decided in accordance with paper attribute.
ISHII HIROFUMI
YAMANO TORU
TAKEBE YOSUKE
YOSHIHARA HIROSHI
| JPH1134449A | 1999-02-09 | |||
| JP2005153469A | 2005-06-16 | |||
| JP2007158782A | 2007-06-21 |
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