IMAGE PROCESSING APPARATUS, IMAGE READING APPARATUS, AND IMAGE PROCESSING METHOD

摘要

PROBLEM TO BE SOLVED: To provide an image processing apparatus appropriately and quickly taking out an area of an original in image data even when an inclined original is read.

SOLUTION: An image scanner apparatus is provided with an automatic image acquiring unit 95 having: a feature point detecting unit 72; an inclination calculating unit 74; a feature point rotation calculating unit 81; and a rectangular area calculating unit 82. The feature point detecting unit 72 detects a plurality of feature points of an original document outline from image data formed by reading an original document. The inclination calculating unit 74 calculates values regarding an original document inclination. The feature point rotation calculating unit 81 calculates 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 82 calculates 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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