Auto-iris control method
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United States of America Patent
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Jan 9, 2018
Grant Date -
Apr 14, 2016
app pub date -
Dec 18, 2015
filing date -
Jun 19, 2013
priority date (Note) -
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status (Latency Note)
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Abstract
An auto-iris control method, including setting a target luminance value of an auto iris; collecting an image at a current moment and calculating a luminance value of the image collected at the current moment; comparing the target luminance value with the luminance value of the image collected at the current moment; comparing an absolute value of the luminance difference at the current moment with a preset luminance difference threshold, determining a status of the auto iris at the current moment, and using a corresponding proportional-integral-derivative (PID) algorithm to calculate a direct current control voltage at the current moment; and adjusting an action of the auto iris according to the calculated direct current control voltage.
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