| 摘要 |
An image scanner apparatus includes an automatic image acquiring unit having a feature point detecting unit, an inclination calculating unit, a feature point rotation calculating unit, and a rectangular area calculating unit. The feature point detecting unit is arranged to detect a plurality of feature points of an original document outline from image data acquired by scanning an original document. The inclination calculating unit is arranged to calculate values regarding an original document inclination. The feature point rotation calculating unit is arranged to calculate positions of rotated feature points acquired by rotating the plurality of feature points detected through the feature point detecting unit around a prescribed center point by an inclination angle in a direction in which the original document inclination is corrected. The rectangular area calculating unit is arranged to calculate a non-inclined rectangular area having an outline that is disposed in the vicinity of the rotated feature points based on the positions of the rotated feature points.
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