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US 9,432,590 B2Granted
DCT based flicker detection
AssigneeNVIDIA Corporation
InventorsHugh Phu Nguyen, Yining Deng, Eric Francois Xavier Dujardin, Abhinav Sinha
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AssigneeNVIDIA Corporation
InventorsHugh Phu Nguyen, Yining Deng, Eric Francois Xavier Dujardin, Abhinav Sinha
Estimating the term…
One embodiment of the present invention sets forth a technique for reducing flicker in image frames captured with a rolling shutter. A flicker detection and correction engine selects a first channel from a first image frame for processing. The flicker detection and correction engine subtracts each pixel value in the first channel from a corresponding pixel value in a prior image frame to generate a difference image frame. The flicker detection and correction engine identifies a first alternating current (AC) component based on a discrete cosine transform (DCT) associated with the difference image frame. The flicker detection and correction engine reduces flicker that is present in the first image frame based on the first AC component. One advantage of the disclosed techniques is that the flicker resulting from fluctuating light sources is correctly detected and reduced or eliminated irrespective of the frequency of the fluctuating light source.
A method for reducing flicker in image frames captured with a rolling shutter, the method comprising:
A computing device, comprising:
A non-transitory computer-readable storage medium including instructions that, when executed by a processing unit, cause the processing unit to reduce flicker in image frames captured with a rolling shutter, by performing the steps of:
Dependencies are inferred from the claim text.