Appeal No. 2006-3077
Application No. 09/911,912
Invention
Appellant invented a method and system for adjusting color image data in
a processed array of pixels. The invention uses a scanner that includes: (1) a
photo-sensor array to convert the image data into an electrical signal, (2) an
A-to-D converter to convert the electrical signal into raw digital data, and (3)
a tone map to transform the raw digital data into corrected digital data.
Particularly, after scanning an image, each resulting color component of the
pixel (raw image data) is examined to determine whether it needs adjusting.
If the raw image data falls below the lower end of a predetermined threshold
interval, the raw image data belongs to the dark area of the image, and it is
preserved. If the raw image data falls above the upper end of the
predetermined threshold interval, the raw image belongs in the light area of
the image, and a tone map is selectively applied to the raw image data to
create a corrected image data. If, however, the raw image data falls between
the lower and upper ends of the predetermined threshold interval, the raw
image data is modified by interpolating between mid range values to smooth
the transitions between adjacent pixels in dark and light areas of the image.
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