Methods and apparatus to count people appearing in an image
First Claim
Patent Images
1. A method of counting people appearing in a digital image comprising:
- reducing objects appearing in a series of images to one or more blobs, each of the blobs corresponding to a respective center of motion of a corresponding one of the objects;
for each individual image in a set of the images of the series of images, representing the one or more blobs in the individual image by one or more symbols in a histogram; and
analyzing the symbols appearing in the histogram to count the people in the digital image.
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Abstract
Methods and apparatus to count people appearing in an image are disclosed. One disclosed method reduces objects appearing in a series of images to one or more blobs; for each individual image in a set of the images of the series of images, represents the one or more blobs in the individual image by one or more symbols in a histogram; and analyzes the symbols appearing in the histogram to count the people in the image.
110 Citations
17 Claims
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1. A method of counting people appearing in a digital image comprising:
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reducing objects appearing in a series of images to one or more blobs, each of the blobs corresponding to a respective center of motion of a corresponding one of the objects; for each individual image in a set of the images of the series of images, representing the one or more blobs in the individual image by one or more symbols in a histogram; and analyzing the symbols appearing in the histogram to count the people in the digital image. - View Dependent Claims (2, 3, 4, 5, 6)
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7. An apparatus to count people appearing in a digital image comprising:
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a processor; a memory storing computer readable instructions which, when executed, cause the processor to; reduce objects appearing in a series of images to one or more blobs, each of the blobs corresponding to a respective center of motion of a corresponding one of the objects; for each individual image in a set of the images of the series of images, represent the one or more blobs in the individual image by one or more symbols in a histogram; and analyze the symbols appearing in the histogram to count the people in the image. - View Dependent Claims (8, 9, 10, 11, 12)
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13. A method of counting people appearing in a series of digital images comprising:
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forming difference images by computing differences between sequential pairs of the digital images in the series of digital images, the difference images being indicative of motion; combining a first set of the difference images into a first amalgamated image; combining a second set of the difference images into a second amalgamated image; reducing a first object appearing in the first amalgamated image to a first blob; representing the first blob in the first amalgamated image by a first symbol in a histogram; reducing a second object appearing in the second amalgamated image to a second blob; representing the second blob in the second amalgamated image by adding a second symbol to the histogram; and analyzing the histogram to count the people appearing in the series of images. - View Dependent Claims (14, 15, 16, 17)
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Specification