METHOD OF AND APPARATUS FOR ELIMINATING IMAGE NOISE
First Claim
1. A method of eliminating image noise, the method comprising:
- extracting a spatial-temporal noise level of neighbor pixels around a current pixel;
filtering noise of the current pixel by applying a weight to spatial-temporal pixels around the current pixel based on the extracted spatial-temporal noise level; and
applying a weight to the noise-filtered current pixel and a boosted-up pixel based on an edge intensity, and summing up the weight-applied pixels.
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Abstract
A method and apparatus are provided for eliminating image noise to remove spatial-temporal noise and improve visibility. The method includes extracting a spatial-temporal noise level of neighbor pixels around a current pixel, filtering noise of the current pixel by applying a weight to spatial-temporal pixels around the current pixel based on the extracted spatial-temporal noise level, and applying a weight to the noise-filtered pixel and a boosted-up pixel based on an edge intensity and summing the weight-applied pixels. The spatial-temporal noise level is extracted based on spatial-temporal information of neighbor pixels around a current pixel in a current frame and spatial-temporal information of neighbor pixels around a current pixel in a previous frame.
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Citations
14 Claims
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1. A method of eliminating image noise, the method comprising:
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extracting a spatial-temporal noise level of neighbor pixels around a current pixel; filtering noise of the current pixel by applying a weight to spatial-temporal pixels around the current pixel based on the extracted spatial-temporal noise level; and applying a weight to the noise-filtered current pixel and a boosted-up pixel based on an edge intensity, and summing up the weight-applied pixels. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. An image processing apparatus comprising:
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a noise level extraction unit which extracts a spatial-temporal noise level of neighbor pixels around a pixel based on spatial-temporal information of neighbor pixels around a pixel in a current frame and spatial-temporal information of neighbor pixels around a current pixel in a previous frame; a spatial-temporal noise elimination unit which filters noise of the current pixel by applying a weight to spatial-temporal pixels around the current pixel based on the spatial-temporal noise level extracted by the noise level extraction unit; and an edge improvement unit which applies a weight to the noise-filtered current pixel obtained by the spatial-temporal noise elimination unit and a boosted-up pixel based on an edge intensity and sums the weight-applied pixels. - View Dependent Claims (12, 13, 14)
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Specification