Image capturing method and monitoring apparatus with supplemental lighting modulation
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United States of America Patent
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Aug 21, 2018
Grant Date -
Mar 22, 2018
app pub date -
Sep 8, 2017
filing date -
Sep 19, 2016
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Abstract
An image capturing method with supplemental lighting modulation is applied to a monitoring apparatus having a lighting unit and an image detecting unit. The image capturing method includes dividing a working period of the lighting unit into at least one first sub-period and at least one second sub-period, driving the lighting unit to respectively output supplemental light with different intensity during the first sub-period and the second sub-period, driving the image detecting unit to respectively capture a set of monitoring images with a predetermined amount during the first sub-period and the second sub-period, comparing the monitoring image captured in the first sub-period with ones captured in the second sub-period, analyzing definition of the set of monitoring images, and selecting a corresponding monitoring image having the definition greater than a threshold to execute image recognition.
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