Patent ID: 9361552
Filing Date: 2016-06-07
CPC Classification: G06K,H04N

Claim Text:
1. An image detection apparatus comprising: a paper conveying unit structured to convey a sheet on which a correction chart is formed with a plurality of patch arrays which are arranged in the direction perpendicular to a sheet conveying direction, each of the patch arrays consisting of a plurality of patches which are linearly arranged; a colorimetric unit located to face the sheet which is conveyed by the paper conveying unit and structured to perform colorimetric measurement of a part of the plurality of patch arrays of the correction chart and output color information of each patch included in the part of the plurality of patch arrays as colorimetric data; and a control unit structured to control the paper conveying unit and the colorimetric unit, wherein the paper conveying unit includes a re-conveying route structured to circulate the sheet, which has been passed through the colorimetric unit, to the colorimetric unit again, and wherein the control unit is structured to perform switch control for switching the patch array to be colorimetrically measured while circulating the sheet through the re-conveying route.