Method and apparatus for representing and searching for an object using shape
First Claim
1. A method of representing an object appearing in an image, wherein the object appears in the image with a first two-dimensional outline in a first perspective view, by processing signals corresponding to the image using one or more processors, the method comprising:
- extracting, using a processor, the first two-dimensional outline of the object in the image;
deriving, using a processor, a view descriptor of the first two-dimensional outline of the object in the first perspective view;
identifying the object;
identifying at least one image in a database of images that includes the object, or a different example of the object, in a perspective view different from the first perspective view;
extracting, using a processor, at least one of the identified images from the database;
obtaining, using a processor, from the extracted image at least one additional outline of the object in a perspective view different from said first perspective view;
deriving, using a processor, at least one additional view descriptor of an outline of the object in a perspective view different from said first perspective view; and
associating, using a processor, the two or more view descriptors representing the outlines of the object from different perspective views to form an object descriptor.
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Accused Products
Abstract
A method is disclosed for representing a sequence of images constituting a moving image by processing signals corresponding to the image. An object appearing in one image is identified in the sequence in a first perspective view, and the same object appearing in another image is identified in the sequence in a second perspective view. A view descriptor of the outline of the object in the first perspective view is derived and at least one additional view descriptor of the outline of the object in another perspective view is also derived. The two or more view descriptors are associated to form a descriptor which is a single indexable entity for the sequence of images.
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Citations
10 Claims
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1. A method of representing an object appearing in an image, wherein the object appears in the image with a first two-dimensional outline in a first perspective view, by processing signals corresponding to the image using one or more processors, the method comprising:
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extracting, using a processor, the first two-dimensional outline of the object in the image; deriving, using a processor, a view descriptor of the first two-dimensional outline of the object in the first perspective view; identifying the object; identifying at least one image in a database of images that includes the object, or a different example of the object, in a perspective view different from the first perspective view; extracting, using a processor, at least one of the identified images from the database; obtaining, using a processor, from the extracted image at least one additional outline of the object in a perspective view different from said first perspective view; deriving, using a processor, at least one additional view descriptor of an outline of the object in a perspective view different from said first perspective view; and associating, using a processor, the two or more view descriptors representing the outlines of the object from different perspective views to form an object descriptor. - View Dependent Claims (2, 3, 4, 5, 6, 8, 9, 10)
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7. A computer-implemented method of representing an object appearing in an image to index the respective image or sequence of images of which it is a part for searching purposes, the method comprising:
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extracting, using a processor, a two-dimensional outline of an object appearing in the image in a first perspective view; identifying the object; identifying, using a processor, at least one image in a database of images that includes the object, or a different example of the object, in a perspective view different from the first perspective view; extracting, using a processor, at least one of the identified images from the database and obtaining, from an extracted image, at least one additional outline of the object in a perspective view different from said first perspective view; deriving, using a processor, a plurality of view descriptors corresponding to a plurality of two-dimensional outlines of the object in different views, by processing signals corresponding to the outlines; and associating the view descriptors to form an object descriptor to index the respective image or image sequence.
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Specification