Facsimile and static presentation processing – Natural color facsimile – Measuring – testing – and calibrating
Patent
1996-12-30
1999-01-12
Coles, Edward L.
Facsimile and static presentation processing
Natural color facsimile
Measuring, testing, and calibrating
358514, 358524, 358525, H04N 146
Patent
active
058597123
ABSTRACT:
A sensor-to-sensor distance correcting method and a circuit therefor in an image reading apparatus having a plurality of line sensors are provided. In the image reading apparatus including an image sensing means for converting optical image information into an electrical signal, an analog-to-digital converting means for converting a signal from said image sensing means into a digital signal, and a sensor-to-sensor distance correcting means, the means for correcting a distance between sensors comprises an extra-line corrector for correcting a registration error of an integer line unit among distances between sensors by housing sensor data for reading an image at a preceding position on a manuscript using red and green signal delay memories, delaying the housed sensor data until senor data at a next position is read, and reading the delayed sensor data when sensor data at the last position is read, and an intra-line corrector for correcting a decimal point unit registration error among the distances between sensors using a look-up table for housing interpolation kernel data. Therefore, a geometric image registration error generated on an input image caused by the distance between said image sensors is corrected thereby obtaining a high quality image.
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Coles Edward L.
Lee Cheukfan
Samsung Electronics Co,. Ltd.
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