Image sensor dark correction method, apparatus, and system
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United States of America Patent
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Issued Date -
Aug 28, 2008
app pub date -
Feb 23, 2007
filing date -
Feb 23, 2007
priority date (Note) -
Abandoned
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Abstract
A method of performing dark correction for signals generated by an image sensor is disclosed. Dark state signals are received from an image sensor and a dark correction ratio is determined for each pixel based on the dark state signals. Operational state signals are received from the image sensor and a pseudo dark signal is determined for each pixel based on the dark correction ratio and further based on the operational state signals. A corrected signal value based on the pseudo dark signal is determined. The method is capable of compensating for dark signals from the image sensor over a course of a series of measurements notwithstanding changes in temperature and exposure time.
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