Method and device for processing of an image by regularization of total variation
First Claim
1. A method for processing of an image comprising:
- pre-processing the image for determining at least one predominant direction of at least one of edges and texture;
determining a total variation of the image using a weighted sum of variations along the at least one predominant direction and along a direction orthogonal to the at least one predominant direction; and
processing the image using regularization of the total variation.
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Abstract
The invention addresses the problem that traditional Total Variation only enforces the horizontal and vertical intensity continuity and thus fails to reconstruct oblique edges well. In an embodiment, Directional Total Variation is defined which supports multiple gradient directions. It first pre-processes the image and determines the direction of edges/texture; Directional TV is calculated based on the gradients along the determined direction and its orthogonal direction. By utilizing adaptive weights to different directions in the regularization, Directional TV is capable of preserving edges independent from their orientation nicely. Thus, Directional TV regularization based image denoising, compression or super resolution tend to obtain better quality.
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Citations
17 Claims
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1. A method for processing of an image comprising:
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pre-processing the image for determining at least one predominant direction of at least one of edges and texture; determining a total variation of the image using a weighted sum of variations along the at least one predominant direction and along a direction orthogonal to the at least one predominant direction; and processing the image using regularization of the total variation. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A device for processing of an image, comprising
a pre-processing unit adapted to pre-process the image in order to determine at least one predominant direction of at least one of edges and texture; -
a Total Variation determining unit adapted to determine a total variation of the image using a weighted sum of variations along the at least one predominant direction and along a direction orthogonal to the at least one predominant direction; and a processing unit adapted to process the image using regularization of the total variation. - View Dependent Claims (12, 13, 14, 15, 16, 17)
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Specification