Assisted video surveillance of persons-of-interest
First Claim
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1. A computer implemented method for analyzing video data including a plurality of people, the method comprising:
- receiving an identification of a person of interest in an image;
detecting one or more moving persons in a frame for each frame in a plurality of frames of comparison video data, wherein the plurality of frames of comparison video data does not include an image of the person of interest;
creating a record including image data from a subsection of the frame associated with the detected moving person for each of the detected moving persons and for each of the plurality of frames of comparison video data;
creating a person-specific detector for the person of interest by training a support vector machine classifier using at least one image of the person of interest as positive training data and the records of the detected moving persons in plurality of frames of comparison video data as negative training data; and
applying the person-specific detector to a plurality of records from video data of interest to identify one or more records as candidate matches to the person of interest.
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Abstract
Methods, systems and media are described for computer-assisted video surveillance. Methods may support detection of moving persons in video frames, extraction of features of the detected moving persons and identification of which detected moving persons are likely matches to a person of interest. Identification of the likely matches may be determined using an attribute-based search, and/or using a specific person-based search. The method may include using likely matches confirmed as images of the person of interest to reconstruct a path of the person of interest.
24 Citations
23 Claims
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1. A computer implemented method for analyzing video data including a plurality of people, the method comprising:
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receiving an identification of a person of interest in an image; detecting one or more moving persons in a frame for each frame in a plurality of frames of comparison video data, wherein the plurality of frames of comparison video data does not include an image of the person of interest; creating a record including image data from a subsection of the frame associated with the detected moving person for each of the detected moving persons and for each of the plurality of frames of comparison video data; creating a person-specific detector for the person of interest by training a support vector machine classifier using at least one image of the person of interest as positive training data and the records of the detected moving persons in plurality of frames of comparison video data as negative training data; and applying the person-specific detector to a plurality of records from video data of interest to identify one or more records as candidate matches to the person of interest. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A non-transitory computer-readable medium encoded with computer-executable instruction for performing a method comprising:
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receiving an identification of a person of interest in an image; detecting one or more moving persons in a frame for each frame in a plurality of frames of comparison video data, wherein the plurality of frames of comparison video data does not include an image of the person of interest; creating a record including image data from a subsection of the frame associated with the detected moving person for each of the detected moving persons and for each of the plurality of frames of comparison video data; creating a person-specific detector for the person of interest by training a support vector machine classifier using at least one image of the person of interest as positive training data and the records of the detected moving persons in plurality of frames of comparison video data as negative training data; and applying the person-specific detector to a plurality of records from video data of interest to identify one or more records as candidate matches to the person of interest. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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23. A system for video surveillance, the system comprising:
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a graphical user interface for receiving search criteria from a user and displaying search results to a user; a processor for executing computer-executable instructions; and a storage for storing records including images of detected moving persons in video data, for storing features extracted from the records and for storing computer-executable code, the computer-executable code comprising computer executable instructions for; a module that detects one or moving persons in a plurality of frames of input video data and saves a record including image information for each detected moving person in each frame; a module that extracts features for each record, wherein the features include features of a non-head portion of a person; and a module that receives a user input regarding a person of interest and calculates a match score for a record based on a comparison of the user input regarding the person of interest and the extracted features for the record, the module that calculates a match score including an instance-based search module that; creates a person-specific detector for the person of interest by training a support vector machine classifier using image data of the person of interest as positive training data and the records of detected moving persons in comparison video data that does not include the person of interest as negative training data; and applies the person-specific detector to records from video data of interest to calculates an instance-based match score
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Specification