Flicker detecting circuit and method in image sensor

Details Flicker detecting circuit and method in image sensor Flicker detecting circuit and method in image sensor

2011-06-21

2011-06-21

Ometz, David L (Department: 2622)

Television

Camera, system and detail

Combined image signal generator and general image signal...

C348S227100, C348S228100

Reexamination Certificate

active

07965323

ABSTRACT:
A circuit includes a luminance average value output unit for extracting luminance values from pixel data of the first and the second frames to generate first luminance average values for pixel lines of the first frame and second luminance average values for pixel lines of the second frame, a flicker curve generating unit for subtracting the second luminance average values from the first luminance average values, thereby generating a flicker curve, and a flicker detecting unit for extracting a plurality of local minimum points from the flicker curve, calculating a distance between each two neighboring local minimum points of the extracted local minimum points, and determining whether the flicker is present based on the distances and the frequency numbers of the distances.

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“Design of Efficient Flicker Detector for CMOS Image Sensor”, (Proceedings of IEEK Fall Conference 2005 vol. 28,No. 2, pp. 739-742).
Taiwanese Office Action dated Jun. 17, 2010 (Translation provided).

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