Patent
1992-11-17
1993-12-14
Herndon, Heather R.
395109, G06F 1520
Patent
active
052710963
ABSTRACT:
A computer imaging system for calibration of scanners and printers. A calibration image is stored and manipulated as desired, and printed out as a resultant calibration picture. The resultant calibration picture is input to the system to create a resultant calibration image. A comparison is made between the original calibration image and the resultant calibration image, yielding calibration data indicating the distortion introduced by the hardware and software combination used in the calibration process. The calibration data is then used in a correction stage wherein a picture is input to the system, anti-distorted utilizing the calibration data, and an output picture provided with the anti-distorted data causing the output picture to appear substantially identical to the input picture. Alternatively, the calibration data is used together with a second set of calibration data generated by comparing an input calibration picture with known accurate data values corresponding to the calibration picture. The second set of calibration data is representative of the distortions caused by the input device only. The first and second sets of calibration data are combined, providing a third set of calibration data which represents distortions introduced by the output device only. The second and third sets of calibration data are used during normal operation of the system to provide computer images adjusted for the distortions which would otherwise be introduced by the input device, and which provide output pictures adjusted for the distortions which would otherwise be introduced by the output device.
REFERENCES:
patent: 4500919 (1985-02-01), Schreiber
patent: 4639770 (1987-01-01), Jung et al.
patent: 4757389 (1988-07-01), Clark et al.
patent: 4802007 (1989-01-01), van der Brug
patent: 5018008 (1991-05-01), Asada
Herndon Heather R.
Light Source Computer Images, Inc.
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