Patent ID: 8433209

Claim:
A detecting apparatus for inspecting a print status of an image printed on a sheet by a printing apparatus, the detecting apparatus comprising: a reading unit configured to read the image printed on the sheet by the printing apparatus; a calculating unit configured to calculate a print misregistration amount of the image printed on the sheet with respect to the sheet based on image data read from the sheet by the reading unit; a determining unit configured to determine whether the print misregistration amount calculated by the calculating unit is larger than a predetermined threshold; a correcting unit configured to correct, when the determining unit determines that the print misregistration amount is less than or equal to the predetermined threshold, the image data read by the reading unit to image data comparable with image data rasterized by the printing apparatus to determine the print status of the image; and a detecting unit configured to detect, when the determining unit determines that the print misregistration amount of the image printed on the sheet is larger than the predetermined threshold, an abnormality of the print status of the image read by the reading unit without performing correction by the correcting unit.