| 摘要 |
<P>PROBLEM TO BE SOLVED: To solve the problem that since the inclination of a document image used to be detected by using the feature of every character, the detecting precision of the inclination may be deteriorated due to the size of the character or the influence of a noise on the character generated in copy. <P>SOLUTION: Reduction processing is performed on document image data I including a document area so as to generate a reduced document image Is corresponding to the document area that has been extracted. Filter processing is performed on the reduced document image Is so as to generate an edge image Ie by extracting the edge of the document area. Then, a straight line adjoining an edge of the edge image Ie is detected using a Hough transformation so that the inclination of the document image is determined based on an inclination of the straight line. Thus, inclination detection with high accuracy can be performed based on the feature of the document area. <P>COPYRIGHT: (C)2010,JPO&INPIT |
