| 摘要 |
PROBLEM TO BE SOLVED: To make a suitable shading correction and to improve through-put, in an image reader that captures image data by photo-electrically reading a document and also captures black shading data and white shading data by photo-electrically reading a reference part.SOLUTION: An interruption instruction signal capturing section 21 is provided for capturing an interruption instruction signal that instructs to temporarily stop reading a document. If an interruption time from a point in time that the interruption instruction signal is captured is equal to or greater than a predetermined time when the interruption instruction signal is captured, a reading control section 20 controls a reading section 11 so as to capture black shading data and white shading data. If the interruption time is less than the predetermined value, the reading control section 20 controls the reading section 11 so as to capture only the white shading data of the black shading data and white shading data. |
