Reducing flicker due to ambient illumination in camera captured images

Minwoong Kim; Kurt Bengtson; Lisa Li; Jan P. Allebach

doi:10.1117/12.2008271

4 February 2013 Reducing flicker due to ambient illumination in camera captured images

Minwoong Kim, Kurt Bengtson, Lisa Li, Jan P. Allebach

Proceedings Volume 8652, Color Imaging XVIII: Displaying, Processing, Hardcopy, and Applications; 865207 (2013) https://doi.org/10.1117/12.2008271
Event: IS&T/SPIE Electronic Imaging, 2013, Burlingame, California, United States

Abstract

The flicker artifact dealt with in this paper is the scanning distortion arising when an image is captured by a digital camera using a CMOS imaging sensor with an electronic rolling shutter under strong ambient light sources powered by AC. This type of camera scans a target line-by-line in a frame. Therefore, time differences exist between the lines. This mechanism causes a captured image to be corrupted by the change of illumination. This phenomenon is called the flicker artifact. The non-content area of the captured image is used to estimate a flicker signal that is a key to being able to compensate the flicker artifact. The average signal of the non-content area taken along the scan direction has local extrema where the peaks of flicker exist. The locations of the extrema are very useful information to estimate the desired distribution of pixel intensities assuming that the flicker artifact does not exist. The flicker-reduced images compensated by our approach clearly demonstrate the reduced flicker artifact, based on visual observation.

Citation Download Citation

Minwoong Kim, Kurt Bengtson, Lisa Li, and Jan P. Allebach "Reducing flicker due to ambient illumination in camera captured images", Proc. SPIE 8652, Color Imaging XVIII: Displaying, Processing, Hardcopy, and Applications, 865207 (4 February 2013); https://doi.org/10.1117/12.2008271

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