Image processing method for automated contrast modification of digital image data
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United States of America Patent
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May 8, 2007
Grant Date -
Mar 25, 2004
app pub date -
Sep 23, 2003
filing date -
Sep 24, 2002
priority date (Note) -
Expired
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Abstract
The invention relates to an image-processing method for automated contrast modification of digital image data. At least one low and one high-frequency signal are formed based on the digital image signal of the image data; the low-frequency signal component is modified using a characteristic-curve function; and then the modified, low-frequency signal is again added to the high-frequency signal component. In order to prevent the occurrence of distracting artifacts, so-called 'halos', the formation of the low-frequency signal component to be modified is formed in dependence upon the high-frequency image components.
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