Image-quality measuring method

Details Image-quality measuring method Image-quality measuring method

1997-06-10

1999-11-09

Rogers, Scott

Image analysis

Image enhancement or restoration

Edge or contour enhancement

382168, 382199, 382205, G06K 946, G06K 952, G06K 956, G06T 500, G06T 540

Patent

active

059829427

ABSTRACT:
Upon measuring the image-quality of an original document, the original document is photographed, and the resulting image is displayed on cells within a window so that image-quality data, such as the degree of edge-irregularity a, is obtained. A regression line is found based upon the correlation between the cell size and the image-quality data. By setting the image-quality data resulting from a specific sell size as a reference value, respective pieces of image-quality data are converted and corrected based upon the regression line using the reference value as a target. Thus, it becomes possible to compare pieces of image quality data in an equivalent manner even if they were obtained from measurements using different magnifications.

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