Facsimile and static presentation processing – Natural color facsimile – Scanning
Patent
1995-12-15
1999-05-25
Lee, Thomas D.
Facsimile and static presentation processing
Natural color facsimile
Scanning
358504, 358482, H04N 146
Patent
active
059074140
ABSTRACT:
A color image processor that corrects a color image signal for the disagreement of images caused by the vibration of the image sensor when scanning a manuscript. The image sensor delivers an image signal that includes three signals, each one representing the level of brightness of one of the primary colors contained on the scanned image. Each signal includes a discrete value for each pixel reading the sensor and hence, comprises the brightness levels for a plurality of pixels. One of the three signals is called a standard color signal; the other two are called non-standard color signals. Each of the brightness levels of a non-standard color signal is sequentially stored in a register array. Individual levels of the pixels in the register array are examined to determine whether a pixel exists at an edge portion of a letter image. A pixel that exists at an edge portion is called a correction objective pixel. Various detectors connected to the register array are used to determine whether a pixel is a correction objective pixel. If a pixel is determined to be a correction objective pixel, the levels of brightness of neighboring pixels together with the level of brightness of the standard color pixel corresponding to the correction objective pixel are used to calculate a correction factor, which factor is used to adjust the level of brightness of the correction objective pixel. By adjusting the value of the level of brightness of the correction objective pixel of the non-standard color pixels the image signal is corrected for unwanted movements of the image sensor.
REFERENCES:
patent: 5321529 (1994-06-01), Funada
patent: 5357353 (1994-10-01), Hirota
Lee Thomas D.
Matsushita Electric - Industrial Co., Ltd.
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