Image analysis – Image transformation or preprocessing – Measuring image properties
Reexamination Certificate
2006-03-21
2006-03-21
Patel, Kanjibhai (Department: 2625)
Image analysis
Image transformation or preprocessing
Measuring image properties
C382S281000
Reexamination Certificate
active
07016552
ABSTRACT:
A Hough transform unit executes Hough transform to HIGH pixels of outline binary image data inputted thereto, and stores the calculation result in a Hough space data storage. A Hough space data calculating/projecting unit sequentially reads out data stored in the Hough space data storage, executes a specific calculation, and thereafter stores the calculation result sequentially in a calculated projection data storage. An angle detector sequentially reads out calculated frequency data stored in the calculated projection data storage, calculates the maximal value of the data read out, and detects an angle that gives the maximal value as the skew angle. The image processing device, being thus configured, allows detecting and correcting the skew angle with high accuracy, even when the input image contains image elements such as photograph images and dot images.
REFERENCES:
patent: 5054098 (1991-10-01), Lee
patent: 5181260 (1993-01-01), Kurosu et al.
patent: 2-170280 (1990-07-01), None
patent: 6-203202 (1994-07-01), None
patent: 11-73503 (1999-03-01), None
patent: 11-328408 (1999-11-01), None
Baxes, Gregory A., Digital Image Processing, 1994, John Wiley & Sons, Inc., ISBN 0-471-00949-0, (p. 136).
Gonzalez, Rafael C., Woods, Richard E., Digital Image Processing, 1992, Addison-Wesley, Inc., ISBN 0-201-50803-6, (p. 663).
Sun, Changming, Si, Deyi, Skew and Slant Correction for Document Images using Gradient Direction, Document Analysis and Recognition, 1997, (pp. 142-146).
Fuji 'Xerox Co., Ltd.
Patel Kanjibhai
Perungavoor Sath V.
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