Method for preserving spatial detail and color content when adjusting the tone scale of a digital color image
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United States of America Patent
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Jun 18, 2002
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N/A
app pub date -
Dec 31, 1998
filing date -
Dec 31, 1998
priority date (Note) -
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Abstract
A method for preserving spatial detail and color content is performed when adjusting the tone scale of a digital color image. This method comprises the steps of receiving a digital color image, providing a tone scale function for adjusting the tone scale of the digital color image; providing a spatial filter for adjusting the tone scale of the digital color image; transforming the digital color image into a luminance signal and chrominance signals; using the tone scale function, the spatial filter, and the luminance signal to produce an enhanced luminance signal; and using the tone scale function, the spatial filter, the luminance signal, and the chrominance signals to produce enhanced chrominance signals.
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