| 摘要 |
PROBLEM TO BE SOLVED: To provide a flicker detecting circuit and method in an image sensor for judging whether a flicker is present or not, while minimizing a semiconductor-implemented area and the hardware resources. SOLUTION: A flicker detecting circuit in an image sensor of the present invention includes a luminance average value output unit for extracting luminance values from pixel data of the first and the second frames obtained by photographing an image, to generate first luminance average values and second luminance average values by lines corresponding to the first and second frames, a flicker curve generating unit for subtracting the second luminance average values from the first luminance average values generated by the lines, thereby generating a flicker curve, and a flicker detecting unit for extracting a plurality of local points from the flicker curve, calculating a distance value between each two neighboring local points of the extracted local minimum points, and judging whether the flicker is present based on the distance values and the frequency numbers of the distance values. COPYRIGHT: (C)2007,JPO&INPIT
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