Single line bayer RGB bad pixel correction
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United States of America Patent
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Issued Date -
Nov 10, 2005
app pub date -
Jun 3, 2004
filing date -
May 7, 2004
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Abandoned
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Abstract
In large arrays of image sensing devices, like CCDs, a small number of defective image elements (pixels) must be tolerated and the resulting image degradation should be eliminated through bad pixel correction. The disclosed invention provides a mechanism to effectively detect defective pixels 'on the fly' in a Bayer RGB type color image sensor, optimized for low cost applications. It calculates a variable threshold based on signal changes on nearby pixels of the same color within a single row and checks if the signal change of the pixel under test exceeds said variable threshold. It further performs a plausibility check using nearby pixels of an other color in the same row.
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