Person search method and device for searching person staying on platform
First Claim
1. A person search method comprising:
- a first step of receiving face detection data including a feature extracted from a facial image detected from images of a plurality of cameras, an attribute of each camera and time information, and registering records including the face detection data in a first database or a second database depending on the attributes of the cameras;
a second step of grouping records of a same person by searching for similar features in at least one of the first database and the second database using, as a search key, a feature of any record which is registered in the first database and has undetermined estimated person ID, assigning an estimated person ID to the record used as the search key based on a predetermined first rule, and updating a white list retaining the assigned estimated person ID in association with the feature thereof;
a third step of detecting a suspicious person candidate by creating a suspicious person appearance list based on a predetermined second rule, and searching for similar features in the suspicious person appearance list using, as a search key, a feature of a record newly registered in at least the second database; and
a fourth step of adding an appearance history to the record having the feature used as the search key in the third step when the suspicious person candidate is detected, and determining whether or not the suspicious person candidate corresponds to a suspicious person based on a predetermined third rule from the appearance history retained in the suspicious person appearance list.
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Accused Products
Abstract
Provided is a suspicious person detection method. First, a normal similar facial image search is carried out. Next, facial images, which are detected automatically from the input images and specified manually, are specified to be determined. Next, similar faces are searched for limited time on a time axis on the database. Next, the number of search results that distance between the features is lower than predetermined value is calculated and it is determined that the number of appearances is large and a possibility of a prowling person is high if the number of cases is large, and otherwise a possibility of prowling person is low. Last, a similarity between a facial image of a pre-registered residents and a facial image of a person whose number is large is calculated, and it is re-determined that the person is residents if the similarity is high, regardless of the determination.
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Citations
6 Claims
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1. A person search method comprising:
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a first step of receiving face detection data including a feature extracted from a facial image detected from images of a plurality of cameras, an attribute of each camera and time information, and registering records including the face detection data in a first database or a second database depending on the attributes of the cameras; a second step of grouping records of a same person by searching for similar features in at least one of the first database and the second database using, as a search key, a feature of any record which is registered in the first database and has undetermined estimated person ID, assigning an estimated person ID to the record used as the search key based on a predetermined first rule, and updating a white list retaining the assigned estimated person ID in association with the feature thereof; a third step of detecting a suspicious person candidate by creating a suspicious person appearance list based on a predetermined second rule, and searching for similar features in the suspicious person appearance list using, as a search key, a feature of a record newly registered in at least the second database; and a fourth step of adding an appearance history to the record having the feature used as the search key in the third step when the suspicious person candidate is detected, and determining whether or not the suspicious person candidate corresponds to a suspicious person based on a predetermined third rule from the appearance history retained in the suspicious person appearance list. - View Dependent Claims (2, 3, 4, 5)
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6. A device for searching a person staying on a platform, comprising:
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means for creating a database by detecting facial images in input images from cameras for capturing a station platform, extracting features from the facial images, and registering the features in the database together with time information; means for searching for, in the database created in the creating step, similar features among the features registered in a predetermined time period longer than a time period between arrival and departure of a train; means for determining whether or not a person is staying on the platform by comparison between the number of the features of the person detected by said means for searching and the number of registrations which allows a person to be expected as a staying person; means for registering the person who is determined as the staying person in a black list; and means for, when a feature similar to the features of the registered person is retrieved from the database, notifying that.
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Specification