Identifying objects in images using object identity probabilities based on interframe distances
First Claim
Patent Images
1. An identity determination apparatus comprising:
- a processor configured to;
detect a plurality of objects from an input video by using pattern recognition techniques with templates;
calculate an interframe distance between frames from which the objects are detected, the interframe distance being a time distance between frames from which the respective objects are detected;
calculate an object identity probability by using the calculated interframe distance and a relationship between the interframe distance and the object identity probability, the relationship being preliminarily set on a basis of a scenario of the input video; and
determine identity of the objects based on a comparison between the calculated object identity probability and a threshold,wherein the determined identity of the objects is updated when a new frame having a detected object is processed, the determined identity is based on a first group of frames, the update being based on frames including at least part of the first group of frames and the new frame, and wherein when a result of the determined identity based on the first group of frames is not consistent with a result of a determined identity of the objects based on the at least part of the first group of frames and the new frame, the update includes replacing the result of the determined identity based on the first group of frames with the result of the determined identity based on the at least part of the first group of frames and the new frame.
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Abstract
The invention makes it possible to determine whether or not objects appearing in various temporal positions in an input video are identical to each other. Identity between a plurality of objects detected from an input video is determined by using an object identity probability determined based on an interframe distance, the interframe distance being a distance between frames from which the respective objects are detected.
21 Citations
61 Claims
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1. An identity determination apparatus comprising:
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a processor configured to; detect a plurality of objects from an input video by using pattern recognition techniques with templates; calculate an interframe distance between frames from which the objects are detected, the interframe distance being a time distance between frames from which the respective objects are detected; calculate an object identity probability by using the calculated interframe distance and a relationship between the interframe distance and the object identity probability, the relationship being preliminarily set on a basis of a scenario of the input video; and determine identity of the objects based on a comparison between the calculated object identity probability and a threshold, wherein the determined identity of the objects is updated when a new frame having a detected object is processed, the determined identity is based on a first group of frames, the update being based on frames including at least part of the first group of frames and the new frame, and wherein when a result of the determined identity based on the first group of frames is not consistent with a result of a determined identity of the objects based on the at least part of the first group of frames and the new frame, the update includes replacing the result of the determined identity based on the first group of frames with the result of the determined identity based on the at least part of the first group of frames and the new frame. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 58, 61)
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20. An identity determination method characterized by determining identity between a plurality of objects detected from an input video by comparing an object identity probability determined based on an interframe distance with a threshold using a processor, the interframe distance being a time distance between frames from which the respective objects are detected, the method comprising the steps of:
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(a) detecting a plurality of objects from an input video by using pattern recognition techniques with templates; (b) calculating an interframe distance between frames from which the objects are detected; (c) calculating an object identity probability by using the interframe distance and a relationship between the interframe distance and the object identity probability, the relationship being preliminarily set on a basis of a scenario of the input video; and (d) determining identity of the objects by comparing the object identity probability with a threshold, wherein the determined identity of the objects is updated when a new frame having a detected object is processed, the determined identity is based on a first group of frames, the update being based on frames including at least part of the first group of frames and the new frame, and wherein when a result of the determined identity based on the first group of frames is not consistent with a result of a determined identity of the objects based on the at least part of the first group of frames and the new frame, the update includes replacing the result of the determined identity based on the first group of frames with the result of the determined identity based on the at least part of the first group of frames and the new frame. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 59)
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21. An identity determination method characterized by determining identity between a plurality of objects detected from an input video by comparing an object identity probability determined based on an interframe distance with a threshold using a processor, the interframe distance being a time distance between frames from which the respective objects are detected, the method comprising the steps of:
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a) detecting a plurality of objects from an input video by using pattern recognition techniques with templates; b) calculating an interframe distance between frames from which the objects are detected; c) selecting an object identity probability from a previously-stored correspondence table of interframe distances and object identity probabilities based on the interframe distance calculated; and d) determining identity of the objects by comparing the object identity probability with a threshold, wherein the determined identity of the objects is updated when a new frame having a detected object is processed, the determined identity is based on a first group of frames, the update being based on frames including at least part of the first group of frames and the new frame, and wherein when a result of the determined identity based on the first group of frames is not consistent with a result of a determined identity of the objects based on the at least part of the first group of frames and the new frame, the update includes replacing the result of the determined identity based on the first group of frames with the result of the determined identity based on the at least part of the first group of frames and the new frame.
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39. An identity determining computer program product, embodied on a non-transitory computer-readable medium, which when executed by a computer causes the computer to:
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determine identity between a plurality of objects detected from an input video by comparing an object identity probability determined based on an interframe distance with a threshold, the interframe distance being a time distance between frames from which the respective objects are detected, wherein the identity determining computer program product, which when executed by the computer further causes the computer to; detect the plurality of objects from the input video by using pattern recognition techniques with templates; calculate the interframe distance between frames from which the objects are detected; calculate the object identity probability by using the interframe distance and a relationship between the interframe distance and the object identity probability, the relationship being preliminarily set on a basis of a scenario of the input video; and determine the identity of the objects by comparing the object identity probability with the threshold, wherein the determined identity of the objects is updated when a new frame having a detected object is processed, the determined identity is based on a first group of frames, the update being based on frames including at least part of the first group of frames and the new frame, and wherein when a result of the determined identity based on the first group of frames is not consistent with a result of a determined identity of the objects based on the at least part of the first group of frames and the new frame, the update includes replacing the result of the determined identity based on the first group of frames with the result of the determined identity based on the at least part of the first group of frames and the new frame. - View Dependent Claims (42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 60)
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40. An identity determining computer program product, embodied on a non-transitory computer-readable medium, which when executed by a computer causes the computer to:
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determine identity between a plurality of objects detected from an input video by comparing an object identity probability determined based on an interframe distance with a threshold, the interframe distance being a time distance between frames from which the respective objects are detected, wherein the identity determining computer program product, which when executed by the computer further causes the computer to; detect a plurality of objects from an input video by using pattern recognition techniques with templates; calculate an interframe distance between frames from which the objects are detected; select an object identity probability from a previously-stored correspondence table of interframe distances and object identity probabilities based on the interframe distance calculated; and determine identity of the objects by comparing the object identity probability with a threshold, wherein the determined identity of the objects is updated when a new frame having a detected object is processed, the determined identity is based on a first group of frames, the update being based on frames including at least part of the first group of frames and the new frame, and wherein when a result of the determined identity based on the first group of frames is not consistent with a result of a determined identity of the objects based on the at least part of the first group of frames and the new frame, the update includes replacing the result of the determined identity based on the first group of frames with the result of the determined identity based on the at least part of the first group of frames and the new frame. - View Dependent Claims (41)
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Specification