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US 12,745,011 B2Granted
Auto flicker detector
AssigneeHimax Imaging Limited
InventorFelix Su
Life of this patent
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Abstract
An auto flicker detector (AFD) includes a difference generator that generates a difference image representing difference between consecutive frames of at least one pair of captured images from an image sensor illuminated by a light source; and a correlator operatively performed on the difference image to generate correlations associated with a first frequency and a second frequency respectively. A frequency at which the light source flickers is determined according to the correlations.
Claims17
An auto flicker detector (AFD), comprising:
- a difference generator that generates a difference image representing difference between consecutive frames of at least one pair of captured images from an image sensor illuminated by a light source;
- and
- a correlator operatively performed on the difference image to generate correlations associated with a first frequency and a second frequency respectively;
- wherein a frequency at which the light source flickers is determined by comparing a correlation associated with the first frequency and a correlation associated with the second frequency;
- and
- wherein the determined frequency is used by an imaging system to adjust a rolling-shutter readout parameter to reduce flicker artifacts.
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Dependencies are inferred from the claim text.