Image-signal processing apparatus, image-signal processing method and image-signal processing program
First Claim
Patent Images
1. An image-signal processing apparatus, comprising:
- a band pass filter configured to increase the bit count of an input digital image signal in a bit decompression process and pass on an image signal of a high frequency band;
an amplitude limiting section configured to limit the amplitude of said image signal passed on by said band pass filter to a level determined in advance; and
a subtractor configured to subtract an image signal output by said amplitude limiting section from said input digital image signal.
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Abstract
Disclosed herein is an image-signal processing apparatus, including: a band pass filter configured to increase the bit count of an input digital image signal in a bit decompression process and pass on an image signal of a high frequency band; an amplitude limiting section configured to limit the amplitude of the image signal passed on by the band pass filter to a level determined in advance; and a subtractor configured to subtract an image signal output by the amplitude limiting section from the input digital image signal.
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Citations
18 Claims
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1. An image-signal processing apparatus, comprising:
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a band pass filter configured to increase the bit count of an input digital image signal in a bit decompression process and pass on an image signal of a high frequency band; an amplitude limiting section configured to limit the amplitude of said image signal passed on by said band pass filter to a level determined in advance; and a subtractor configured to subtract an image signal output by said amplitude limiting section from said input digital image signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. An image-signal processing method, comprising the steps of:
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increasing the bit count of an input digital image signal in a bit decompression process and passing on an image signal of a high frequency band; limiting the amplitude of said image signal passed on by said band pass step to a level determined in advance; adjusting the gain of an image signal limited by said amplitude limiting step; and subtracting an image signal output by said gain adjustment step from said input digital image signal.
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18. An image-signal processing computer program, comprising:
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a band pass procedure configured to increase the bit count of an input digital image signal in a bit decompression process and pass on an image signal of a high frequency band; an amplitude limiting procedure configured to limit the amplitude of said image signal passed on by said band pass procedure to a level determined in advance; a gain adjustment procedure configured to adjust the gain of an image signal limited by said amplitude limiting procedure; and a subtractor configured to subtract an image signal output by said gain adjustment procedure from said input digital image signal.
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Specification