Facsimile and static presentation processing – Facsimile – Specific signal processing circuitry
Reexamination Certificate
2005-07-05
2005-07-05
Lee, Cheukfan (Department: 2622)
Facsimile and static presentation processing
Facsimile
Specific signal processing circuitry
C358S487000, C358S443000, C358S448000, C358S463000, C358S482000, C358S483000, C358S506000, C358S444000, C358S475000, C358S513000, C358S514000, C358S523000, C341S155000, C341S156000, C341S172000
Reexamination Certificate
active
06914701
ABSTRACT:
A digitizer having a dual exposure technique is combined with an associated LUT for each exposure. Each LUT may have a transfer function including a logarithmic operator resulting in a digitized image with improved photometric resolution and increased dynamic range. A digitizer utilizing multiple exposures at approximately equal exposure time intervals provides a noise reduction for lower optical density portions of the data medium further contributing to increased dynamic range. Associated methods are also provided.
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Grossman Tucker Perreault & Pfleger PLLC
Howtek Devices Corporation
Lee Cheukfan
LandOfFree
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