Image analysis – Image transformation or preprocessing – Changing the image coordinates
Patent
1997-01-17
1999-09-14
Chang, Jon
Image analysis
Image transformation or preprocessing
Changing the image coordinates
358451, G06K 932
Patent
active
059534630
ABSTRACT:
In an image processing method, an image is read by an image processing apparatus such as a digital copying machine and the read image is divided into blocks composed of a plurality of picture elements. Thereafter, interpolation is performed on a target picture element so that the image is scaled. Then, in the above image processing method, region segmentation data, which represent possibilities of characters, photographs and mesh dots of the target picture element of the image, are detected in a region segmentation section of the image processing apparatus, and the interpolated picture element data of the target picture element are computed by a variable scaling section according to an equation in which density of a plurality of adjacent picture elements in the vicinity of the target picture element are inputted. At this time, a weights of the density of each adjacent picture element in the equation is adjusted based upon the result detected by the region segmentation means. As a result, even if characters, photographs and mesh dots coexist in an image read by a scanner, the image is scaled according to the characters, photographs and mesh dots, thereby preventing deterioration in image quality.
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Nakai Yoshiyuki
Tanaka Tomoki
Chang Jon
Conlin David G.
Gamache Richard E.
Sharp Kabushiki Kaisha
Wu Jingge
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