Video signal processing apparatus, enhancement gain generating method, and enhanced gain generating program
First Claim
1. A video signal processing apparatus, comprising:
- an enhancement gain generating section configured to obtain an enhancement gain for each pixel based on a luminance signal forming part of an input video signal and a predetermined enhancement gain; and
an enhancing section configured to perform a process of enhancing the luminance signal forming part of the input video signal based on the enhancement gain for each pixel obtained by the enhancement gain generating section, whereinthe enhancement gain generating section includesa mean deviation calculating portion configured to obtain a mean deviation of luminance values of a plurality of pixels included in a predetermined region centered at a pixel of interest that is the pixel for which the enhancement gain is to be obtained,a weighting coefficient generating portion configured to generate a weighting coefficient for the pixel of interest according to the value of the mean deviation calculated by the mean deviation calculating portion, anda multiplication portion that multiplies the predetermined enhancement gain by the weighting coefficient generated by the weighting coefficient generating portion to obtain the enhancement gain for the pixel of interest.
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Accused Products
Abstract
A video signal processing apparatus includes: an enhancement gain generating section obtaining an enhancement gain for each pixel based on an luminance signal forming part of an input video signal and a predetermined enhancement gain; and an enhancing section performing a process of enhancing the luminance signal forming part of the input video signal based on the enhancement gain. The enhancement gain generating section includes a mean deviation calculating portion obtaining a mean deviation of luminance values of pixels included in a predetermined region centered at a pixel of interest that is the pixel for which the enhancement gain is to be obtained, a weighting coefficient generating portion generating a weighting coefficient for the pixel of interest according to the value of the mean deviation, and a multiplication portion multiplying the predetermined enhancement gain by the weighting coefficient to obtain the enhancement gain for the pixel of interest.
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Citations
5 Claims
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1. A video signal processing apparatus, comprising:
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an enhancement gain generating section configured to obtain an enhancement gain for each pixel based on a luminance signal forming part of an input video signal and a predetermined enhancement gain; and an enhancing section configured to perform a process of enhancing the luminance signal forming part of the input video signal based on the enhancement gain for each pixel obtained by the enhancement gain generating section, wherein the enhancement gain generating section includes a mean deviation calculating portion configured to obtain a mean deviation of luminance values of a plurality of pixels included in a predetermined region centered at a pixel of interest that is the pixel for which the enhancement gain is to be obtained, a weighting coefficient generating portion configured to generate a weighting coefficient for the pixel of interest according to the value of the mean deviation calculated by the mean deviation calculating portion, and a multiplication portion that multiplies the predetermined enhancement gain by the weighting coefficient generated by the weighting coefficient generating portion to obtain the enhancement gain for the pixel of interest. - View Dependent Claims (2, 3)
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4. A method of generating an enhancement gain, comprising:
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obtaining a mean deviation of luminance values of a plurality of pixels included in a predetermined region centered at a pixel of interest that is a pixel for which an enhancement gain is to be obtained; generating a weighting coefficient for the pixel of interest according to the value of the mean deviation obtained by the obtaining; and multiplying a predetermined enhancement gain by the weighting coefficient generated by the generating to obtain the enhancement gain for the pixel of interest.
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5. A computer-readable storage medium encoded with a program for causing a computer to execute a method of generating an enhancement gain, comprising:
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obtaining a mean deviation of luminance values of a plurality of pixels included in a predetermined region centered at a pixel of interest that is a pixel for which an enhancement gain is to be obtained; generating a weighting coefficient for the pixel of interest according to the value of the mean deviation obtained by the obtaining; and multiplying a predetermined enhancement gain by the weighting coefficient generated by the generating to obtain the enhancement gain for the pixel of interest.
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Specification