Image processing apparatus, image scanning apparatus, and image processing method

Abstract

The invention provides an image processing apparatus, an image reading apparatus and an image processing method. An inclination detecting unit acquires, with respect to each line of image data, positions of a left edge pixel and a right edge pixel that are positioned at a boundary between an original document and a background. Then, the position of a feature, which positions in the original document figure feature part, is acquired based on the position features of the left edge pixel and the right edge pixel of a plurality of lines. And, for each feature point, based on a feature of the position of at least one of the left edge pixel and the right edge pixel of the line that includes the feature point position or of the line that is near the former line, a status regarding a direction of the document is acquired. Finally, the acquired statuses are counted, the most counted status is determined, two feature points are selected from the feature points having a status that matches the most counted status, and the document inclination is calculated from the two feature point positions.

Description

technical field [0001] The present invention mainly relates to an image processing device that automatically detects the inclination of image data obtained by reading a document. [0002] This application claims the priority of Japanese Patent Application No. 2007-278877 filed on October 26, 2007, the entire contents of which are incorporated herein. Background technique [0003] In an image scanner, copying device, facsimile device, optical character reading device (OCR), etc., when an original document is read in an oblique state, an oblique image will be obtained, thereby degrading the reading quality. In order to avoid this situation, an image reading device has been proposed that has an image processing device that analyzes image data and automatically detects the angle of inclination of the document, and performs rotation processing on the image data based on the obtained angle of inclination. , so that the tilt can be corrected electronically. [0004] For example, ...

AI Technical Summary

Problems solved by technology

In addition, it is difficult to place an original document in a bad state such as folded, damaged, rounded, warped, or wrinkled at the corners of the original document, and it is difficult to place it neatly in the device for reading. An image processing device capable of properly performing tilt correction

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