Method and apparatus for improved image generation using scannin

Details Method and apparatus for improved image generation using scannin Method and apparatus for improved image generation using scannin

1995-06-06

1998-07-14

Boudreau, Leo H.

Image analysis

Image sensing

Multiple scanning

382270, G06K 900

Patent

active

057816689

ABSTRACT:
A method and apparatus for improving the quality of images captured by inexpensive scanning devices is described. After an initial scan of the image to be captured is performed, at least two additional scans are performed, one at an exposure level much greater than that used in the first scan and one at an exposure level much lower than that used in the first scan. After all three scans are complete, a composite stored image is formed using the gray scale values generated by the overexposed scan for darker areas of the image, the gray scale level generated by the underexposed scan for the lighter portions of the image, and, for those areas between the extremes, using the gray scale levels produced by the first scan. An apparatus is also described for performing these scans and selecting and combining the requisite data.

REFERENCES:
patent: 4251837 (1981-02-01), Janeway, III
patent: 4750041 (1988-06-01), Vogel et al.
patent: 5144442 (1992-09-01), Ginosar

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