| 摘要 |
Reproducing sepia tone images. The image is scanned using conventional RGB light and added infrared wavelengths. Using L*a*b* color coordinate system, "L"-channel values are determined by the infrared channel only, and "a" and "b" channels are filled with respective benchmark values that represents the yellow-brown sepia background tone of the original. This new L*a*b* data is converted to appropriate output device color space.
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