Removal of fixed pattern noise and other fixed patterns from media signals
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United States of America Patent
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Mar 18, 2003
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N/A
app pub date -
Apr 19, 2000
filing date -
Feb 14, 2000
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Abstract
A method of removing fixed pattern noise derives an estimate of fixed pattern noise from a composite media signal and uses the estimate to evaluate and remove fixed pattern noise from selected frames. The technique is particularly suited for removing fixed pattern noise in images due to image capture processes, but applies to other media signals as well. In watermarking applications, the method can be used to improve detection and recovery of a watermark. Also, it may be used to remove components of a watermark or a watermark from a cover signal that contains two or more different watermarks.
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