Method and apparatus for calibrating image system

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36457101, 358406, 358504, H04N 100

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active

058019626

ABSTRACT:
A method and apparatus for calibrating an image system is disclosed. The method according to the present invention includes inputting data by scanning a plurality of lines into a computer, and analyzing the input data for generating intensity of the scanned lines. The inputting step is repeated when the intensity is less than a low threshold value or the intensity is higher than a high threshold value. Next, any scanned line that includes at least a special point is filtered out. After averaging the corresponding points of the scanned lines not filtered out in order to generate a calibration line, a predetermined number of points of the calibration line are averaged to generate a reference point, wherein the predetermined number of points of the calibration line are brighter than other points of the calibrated line. Finally, the calibration data are obtained by taking ratio of the reference point to each of the points of the calibration line.

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patent: 5266804 (1993-11-01), Shimizu
patent: 5317421 (1994-05-01), Ito
patent: 5347370 (1994-09-01), Ishihara et al.
patent: 5644512 (1997-07-01), Chernoff et al.

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