METHOD OF DETECTING GLOBAL MOTION AND GLOBAL MOTION DETECTOR, AND DIGITAL IMAGE STABILIZATION (DIS) METHOD AND CIRCUIT INCLUDING THE SAME
First Claim
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1. A global motion detecting method comprising:
- receiving a video sequence of input images;
calculating local motion vectors, one for each image block of a current input image;
grouping image blocks of the current input image into image block groups based on local motion vectors of the image block groups;
calculating a group motion parameter of each image block group among the image block groups based on the local motion vectors of its respective image blocks; and
determining a global motion parameter of the current input image based on a selected one of group motion parameters of the image block groups.
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Abstract
Disclosed is a global motion detecting method which includes receiving a video sequence of input images, calculating local motion vectors, one for each image block of a current input image, grouping image blocks of the current input image into image block groups, calculating a group motion parameter of each of the image block groups based on local motion vectors of the image blocks in each respective image block group, and determining a global motion parameter of the currently input image according to the group motion parameters.
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20 Claims
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1. A global motion detecting method comprising:
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receiving a video sequence of input images; calculating local motion vectors, one for each image block of a current input image; grouping image blocks of the current input image into image block groups based on local motion vectors of the image block groups; calculating a group motion parameter of each image block group among the image block groups based on the local motion vectors of its respective image blocks; and determining a global motion parameter of the current input image based on a selected one of group motion parameters of the image block groups. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 20)
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13. A global motion detector comprising:
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a local motion vector calculator configured to calculate the local motion vector of each image block of an input image; a grouping unit configured to group the image blocks into image block groups; an initial group size register configured to provide an initial size of the image block groups to the grouping unit; a random sample consensus calculator configured to calculate a group motion parameter of each of the image block groups based on the local motion vectors of its image block groups; and a determination unit configured to determine the global motion parameter based on the group motion parameters. - View Dependent Claims (14, 15)
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16. A digital image stabilization (DIS) method for stabilizing a video image sequence, comprising:
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receiving a video sequence of input images; and performing a global motion parameter detecting method, wherein the global motion parameter detecting method comprises; calculating a local motion vector of each image block of a current input image; grouping image blocks of the current input image into image block groups based on local motion vectors of the image block groups; calculating a group motion parameter of each image block group among the image block groups based on the local motion vectors of its respective image blocks; and determining a global motion parameter of the current input image based on a selected one of group motion parameters of the image block groups. - View Dependent Claims (17, 18, 19)
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Specification