Image processing circuit and image processing method
First Claim
1. An image processing method, for processing an image based on a SECAM system, the image comprising successively arranged in a vertical line a first pixel, a second pixel and a third pixel respectively corresponding to a first image signal, a second image signal and a third image signal, the image processing method comprising:
- calculating a first chroma signal via a vertical filtering process according to the first image signal, the second image signal and the third image signal, wherein the vertical filtering process comprises a multiplication operation and an addition operation;
calculating a first chroma angular frequency via a frequency demodulation process according to the first chroma signal; and
generating a first chromaticity according to the first chroma angular frequency.
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Abstract
An image processing method and its associated image processing circuit for processing an image based on a sequential couleur avec memoire (SECAM) system are provided. The image includes a first pixel, a second pixel and a third pixel, which are successively arranged in a same vertical line and are respectively corresponding to a first image signal and a second image signal and a third image signal. The image processing method includes steps of calculating a chroma signal via a vertical filtering process according to the first image signal, the second image signal and the third image signal; calculating a chroma angular frequency via a frequency modulation process according to the chroma signal; and generating a chromaticity according to the chroma angular frequency.
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Citations
20 Claims
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1. An image processing method, for processing an image based on a SECAM system, the image comprising successively arranged in a vertical line a first pixel, a second pixel and a third pixel respectively corresponding to a first image signal, a second image signal and a third image signal, the image processing method comprising:
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calculating a first chroma signal via a vertical filtering process according to the first image signal, the second image signal and the third image signal, wherein the vertical filtering process comprises a multiplication operation and an addition operation; calculating a first chroma angular frequency via a frequency demodulation process according to the first chroma signal; and generating a first chromaticity according to the first chroma angular frequency. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. An image processing circuit, for processing an image based on a SECAM system, comprising:
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a receiving unit, for receiving the image comprising successively arranged in a vertical line a first pixel, a second pixel and a third pixel respectively corresponding to a first image signal, a second image signal and a third image signal; a vertical filtering module, coupled to the receiving unit, for calculating a first chroma signal according to the first image signal, the second image signal and the third image signal, wherein the vertical filtering module is configured to perform a multiplication operation and an addition operation; a frequency demodulation module, coupled to the vertical filter module, for calculating a first chroma angular frequency according to the first chroma signal; and a chroma converting unit, coupled to the frequency demodulation module, for generating a first chromaticity according to the first chroma angular frequency. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification