Image segmentation using spatial random walks
First Claim
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1. A method for segmenting an image, comprising the steps of:
- performing an initial segmentation of the image to produce a previous segmented region;
segmenting iteratively the image using a spatial random walk based on a shape prior of the previous segmented region to produce a next segmented region, wherein the spatial random walk is minimizing an energy function E with the shape prior according to E=Erw+vEsp, wherein Erw is an energy of a random walk segmentation, Esp is an energy of the prior shape, and v is a weight parameter controlling an impact of the shape prior into the spatial random walk;
comparing the next segmented region with the previous segmented region;
repeating the segmenting and the comparing until the previous and next segmented regions converge; and
selecting the next segmented region as a final segmented region.
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Abstract
The embodiments of the invention describe a method for segmenting an image. We perform an initial segmentation of the image to produce a previous segmented region and segment iteratively the image using a spatial random walk based on a shape prior of the previous segmented region to produce a next segmented region. We compare the next segmented region with the previous segmented region, and repeat the segmenting and the comparing until the previous and next segmented regions converge. After that, we select the next segmented region as a final segmented region.
20 Citations
17 Claims
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1. A method for segmenting an image, comprising the steps of:
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performing an initial segmentation of the image to produce a previous segmented region; segmenting iteratively the image using a spatial random walk based on a shape prior of the previous segmented region to produce a next segmented region, wherein the spatial random walk is minimizing an energy function E with the shape prior according to E=Erw+vEsp, wherein Erw is an energy of a random walk segmentation, Esp is an energy of the prior shape, and v is a weight parameter controlling an impact of the shape prior into the spatial random walk; comparing the next segmented region with the previous segmented region; repeating the segmenting and the comparing until the previous and next segmented regions converge; and selecting the next segmented region as a final segmented region. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A method for segmenting an image, comprising the steps of:
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segmenting iteratively an image with a spatial random walk segmentation based on a shape prior to produce a next segmented region until the next segmented region converges with a previous segmented region;
selecting the next segmented region as a final segmented region;aligning the shape prior with the previous segmented region; and smoothing adaptively the shape prior with a smoothing function, wherein the smoothing function is adjusted based on an iteration of the segmenting; and rendering the image including the final segmented region. - View Dependent Claims (17)
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Specification