METHOD AND SYSTEM FOR DETECTING FLICKER
First Claim
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1. An image processing system comprising:
- a plurality of active pixels to output active pixel signals at a first readout frequency;
a plurality of flicker pixels to output flicker pixel signals at a second readout frequency greater than the first readout frequency;
a plurality of frequency detectors to accumulate the flicker pixel signals and to perform frequency domain transformation of the accumulated flicker pixel signals; and
a frequency analyzer to detect flicker by analyzing the flicker pixel signals transformed into the frequency domain.
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Abstract
An image processing system includes a plurality of active pixels and a plurality of flicker pixels. The active pixels output active pixel signals at a first readout frequency, and the flicker pixels output flicker pixel signals at a second readout frequency greater than the first readout frequency. A plurality of frequency detectors accumulate the flicker pixel signals and then perform frequency domain transformation of the accumulated flicker pixel signals. A frequency analyzer detects flicker by analyzing the flicker pixel signals which have been transformed into the frequency domain.
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Citations
20 Claims
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1. An image processing system comprising:
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a plurality of active pixels to output active pixel signals at a first readout frequency; a plurality of flicker pixels to output flicker pixel signals at a second readout frequency greater than the first readout frequency; a plurality of frequency detectors to accumulate the flicker pixel signals and to perform frequency domain transformation of the accumulated flicker pixel signals; and a frequency analyzer to detect flicker by analyzing the flicker pixel signals transformed into the frequency domain. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method for detecting flicker in an image processing system, the method comprising:
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accumulating flicker pixel signals output from flicker pixels; performing frequency domain transformation for the accumulated flicker pixel signals; and detecting flicker based on the flicker pixel signals transformed into the frequency domain, wherein the active pixels output active pixel signals at a first readout frequency, and the flicker pixels output the flicker pixel signals at a second readout frequency greater than the first readout frequency. - View Dependent Claims (11, 12)
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13. An image sensor, comprising:
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a first number of active pixels; and a second number of flicker pixels, wherein the first number of active pixels outputs active pixel signals at a first frequency and the second number of flicker pixels outputs flicker signals at a second frequency greater than the first frequency. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20)
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Specification