Method and apparatus for signal-to-noise ratio dependent image processing
First Claim
1. A method for image processing using signal-to-noise ratio dependent filtering, said method comprising:
- measuring noise in an image;
computing a signal-to-noise ratio for a region in the image;
selecting parameters for an image filter framework based on the signal-to-noise ratio; and
processing the image in the filter framework using the parameters.
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Accused Products
Abstract
Certain embodiments of the present invention relate to a signal-to-noise ratio dependent image processing system. The method includes computing at least one SNR for at least one region of an image, determining a filter parameter for at least one region based on the at least one SNR, and processing at least one region of the image based on the filter parameter. In addition to SNR, a filter parameter may be determined using user preferences. The system includes a signal-to-noise ratio processor for determining a signal-to-noise ratio for an image. The system also includes a parameter selection unit for selecting at least one filter parameter based on the signal-to-noise ratio. The system further includes an image filter for filtering the image based on the filter parameter(s). In an embodiment, the SNR processor determines signal-to-noise ratio(s) for region(s) in the image.
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Citations
24 Claims
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1. A method for image processing using signal-to-noise ratio dependent filtering, said method comprising:
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measuring noise in an image; computing a signal-to-noise ratio for a region in the image; selecting parameters for an image filter framework based on the signal-to-noise ratio; and processing the image in the filter framework using the parameters. - View Dependent Claims (2, 3, 4)
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5. A method for regional filtering of an image, said method comprising:
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computing at least one signal-to-noise ratio for at least one region of an image; determining a filter parameter for the at least one region based on the at least one signal-to-noise ratio; and processing the at least one region of the image based on the filter parameter. - View Dependent Claims (6, 7, 8, 9)
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10. An image processing system for signal-to-noise ratio dependent processing of an image, said system comprising:
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a signal-to-noise ratio processor for determining a signal-to-noise ratio for a region in an image; a parameter selection unit for selecting at least one filter parameter for the region based on said signal-to-noise ratio; and an image filter for filtering the region in said image based on said at least one filter parameter. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. An image processing system for signal-to-noise ratio dependent processing of an image, said system comprising:
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a signal-to-noise ratio processor for determining a signal-to-noise ratio for an image; a parameter selection unit for selecting at least one filter parameter for based on said signal-to-noise ratio, wherein said parameter selection unit further selects locally varying parameters and globally varying parameters and wherein said locally varying parameters include blend and edge-smooth parameters; and an image filter for filtering said image based on said at least one filter parameter.
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21. An image processing system for signal-to-noise ratio dependent processing of an image, said system comprising:
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a signal-to-noise ratio processor for determining a signal-to-noise ratio for an image; a parameter selection unit for selecting at least one filter parameter for based on said signal-to-noise ratio, wherein said parameter selection unit further selects locally varying parameters and globally varying parameters and wherein said locally varying parameters are determined based on a histogram of local signal-to-noise ratios; and an image filter for filtering said image based on said at least one filter parameter.
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22. An image processing system for signal-to-noise ratio dependent processing of an image, said system comprising:
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a signal-to-noise ratio processor for determining a signal-to-noise ratio for an image; a parameter selection unit for selecting at least one filter parameter for based on said signal-to-noise ratio, wherein said parameter selection unit further selects locally varying parameters and globally varying parameters and wherein said globally varying parameters are determined based on a histogram of signal-to-noise ratios for a plurality of images; and an image filter for filtering said image based on said at least one filter parameter.
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23. An image processing system for signal-to-noise ratio dependent processing of an image, said system comprising:
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a signal-to-noise ratio processor for determining a signal-to-noise ratio for an image; a parameter selection unit for selecting at least one filter parameter for based on said signal-to-noise ratio, wherein said parameter selection unit further comprises a lookup table relating said signal-to-noise ratio and said filter parameters; and an image filter for filtering said image based on said at least one filter parameter. - View Dependent Claims (24)
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Specification