Method for automatically comparing content of images for classification into events
First Claim
1. A method for comparing image content of first and second images, the method comprising the steps of:
- (a) extracting a portion of both the first and second images both of which portions are determined to include a main subject area of each image;
(b) dividing the main subject area of the images into a plurality of blocks;
(c) computing a color histogram for one block in each image;
(d) computing a histogram intersection value between the block of the first image and the block of the second image;
(e) determining a first threshold value for the computed histogram intersection value that determines similarity between the block in the first image and the block in the second image; and
(f) shifting the first image in a predetermined direction if there is not a similarity between the first and second images and redetermining the similarity between the images in step (c)-(e) for blocks that are shifted with respect to each other.
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Accused Products
Abstract
A method for comparing image content of first and second images, the method comprises the steps of extracting a portion of both the first and second images both of which portions are determined to include a main subject area of each image; dividing the main subject area of the images into a plurality of blocks; computing a color histogram for one block in each image; computing a histogram intersection value between the block of the first image and the block of the second image; and determining a first threshold value for the computed histogram intersection value that determines similarity between the block in the first image and the block in the second image.
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Citations
18 Claims
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1. A method for comparing image content of first and second images, the method comprising the steps of:
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(a) extracting a portion of both the first and second images both of which portions are determined to include a main subject area of each image;
(b) dividing the main subject area of the images into a plurality of blocks;
(c) computing a color histogram for one block in each image;
(d) computing a histogram intersection value between the block of the first image and the block of the second image;
(e) determining a first threshold value for the computed histogram intersection value that determines similarity between the block in the first image and the block in the second image; and
(f) shifting the first image in a predetermined direction if there is not a similarity between the first and second images and redetermining the similarity between the images in step (c)-(e) for blocks that are shifted with respect to each other. - View Dependent Claims (2, 3, 4, 5)
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6. A computer program product for comparing image content of first and second images comprising:
- a computer readable storage medium having a computer program stored thereon for performing the steps of;
(a) extracting a portion of both the first and second images both of which portions are determined to include a main subject of each image;
(b) dividing the main subject of the images into a plurality of blocks;
(c) computing a color histogram for one block in each image;
(d) computing a histogram intersection value between the block of the first image and the block of the second image;
(e) determining a threshold value for the computed histogram intersection value that determines similarity between the block in the first image and the block in the second image; and
(f) shifting the first image in a predetermined direction if there is not a similarity between the first and second images and redetermining the similarity between the images in step (c)-(e) for blocks that are shifted with respect to each other. - View Dependent Claims (7, 8, 9, 10)
- a computer readable storage medium having a computer program stored thereon for performing the steps of;
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11. A method for comparing image content of first and second images, the method comprising the steps of:
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(a) extracting a portion of both the first and second images both of which portions are determined to include a main subject area of each image;
(b) dividing the main subject area of the images into a plurality of blocks;
(c) computing a color histogram for each of the plurality of blocks in each image;
(d) computing a histogram intersection value between one block in the first image and two or more blocks in the second image; and
,(e) determining a first threshold value for the computed histogram intersection value that determines similarity between the block in the first image and the blocks in the second image. - View Dependent Claims (12, 13, 14, 15)
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16. A method for comparing image content of first and second images, the method comprising the steps of:
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(a) dividing the first and second images into three portions and using a middle portion of the three portions as a main subject area of each image;
(b) dividing the main subject area of the images into a plurality of blocks;
(c) computing a color histogram for one block in each image;
(d) computing a histogram intersection value between the block in the first image and the block in the second image; and
(e) determining a first threshold value for the computed histogram intersection value that determines similarity between the block in the first image and the block in the second image. - View Dependent Claims (17, 18)
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Specification