| 摘要 |
PROBLEM TO BE SOLVED: To provide an image processing apparatus that can efficiently perform correction processing such as ground color correction. SOLUTION: The image processing apparatus is equipped with a plurality of color information sensors 50 as means of acquiring mean color information of a document to be used to correct read image data separately from a CCD sensor 113d as a means for read image data generation. An area of the document Dc where it is assumed that there is no print is irradiated with the light from a light source S and its reflected light is photodetected by a color information sensor 50 to acquire a mean color density value of the area. A color density value of the ground color is estimated based upon acquisition results. Even if an image of print etc., other than the ground color is slightly and locally present, its influence can be ignored. The read image data have a color density value, corresponding to the estimated value, replaced with a color density value of white. Namely, the mean color information of the document can be acquired, and ground color corrections can be made without requiring a large-scale circuit for operation. COPYRIGHT: (C)2007,JPO&INPIT
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