Gradation control apparatus and gradation control method
First Claim
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1. A gradation control apparatus comprising:
- a coring module configured to change a coring amount of a video signal such that the coring amount increases as the degree of movement of the video signal becomes higher;
a smoothing module configured to perform a gradation smoothing process on the video signal; and
a parameter controller configured to obtain a frame difference histogram as the degree of movement of the video signal, weight the frame difference histogram so as to have a characteristic in which a frequency increases as a difference value becomes larger, and change an effect parameter for the gradation smoothing process according to a sum of weighted frequencies.
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Abstract
According to one embodiment, a gradation control apparatus comprises a coring module configured to change the coring amount of a video signal according to the degree of movement of the video signal, a smoothing module configured to perform a gradation smoothing process on the video signal, and a parameter controller configured to obtain a frame difference histogram as the degree of movement of the video signal and change an effect parameter for the gradation smoothing process according to the result of weighting the histogram.
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Citations
8 Claims
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1. A gradation control apparatus comprising:
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a coring module configured to change a coring amount of a video signal such that the coring amount increases as the degree of movement of the video signal becomes higher; a smoothing module configured to perform a gradation smoothing process on the video signal; and a parameter controller configured to obtain a frame difference histogram as the degree of movement of the video signal, weight the frame difference histogram so as to have a characteristic in which a frequency increases as a difference value becomes larger, and change an effect parameter for the gradation smoothing process according to a sum of weighted frequencies. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A gradation control method which changes a coring amount of a video signal such that the coring amount increases as the degree of movement of the video signal becomes higher, and performs a gradation smoothing process on the video signal, the method comprising:
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obtaining a frame difference histogram as the degree of movement of the video signal, and weighting the frame difference histogram so as to have a characteristic in which a frequency increases as a difference value becomes larger, and changing an effect parameter for the gradation smoothing process according to a sum of weighted frequencies.
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Specification