TECHNIQUES FOR SELECTIVE NOISE REDUCTION AND IMAGING SYSTEM CHARACTERIZATION
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United States of America Patent
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Issued Date -
Sep 4, 2014
app pub date -
Oct 11, 2013
filing date -
Apr 11, 2011
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Abandoned
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Abstract
Various techniques are disclosed for reducing spatial and temporal noise in captured images. In one example, temporal noise may be filtered while still retaining temporal responsivity in filtered images to allow low contrast temporal events to be captured. Spatial and temporal noise filters may be selectively weighted to more strongly favor filtering using whichever one of the filters is least likely to cause a loss of signal fidelity in actual scene content. Other techniques are disclosed for determining various parameters of imaging systems having image lag. For example, a mean-variance characterization and a noise equivalent irradiance characterization may be performed to determine parameters of the imaging systems. Results of such characterizations may be used to determine the actual performance of the imaging systems without the effects of image lag.
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