Duration and potential region of interest for suspicious activities

A method performed by at least a processor, wherein the method comprises:

• receiving a plurality of image inputs;
• identifying one or more of a characteristic information from each of the plurality of image inputs;
• determining if each of the one or more identified characteristic information is likely to correspond to a target subject characteristic information which was stored in a database;
• retrieving one or more image inputs and their corresponding location coordinates and timestamps relating to the characteristic information that is likely to correspond to the target subject characteristic information upon the determination that at least one identified characteristic information is likely to correspond to a target subject characteristic information;
• determining one or more related subjects that appears within a pre-determined search period;
• constructing paths for the target subject and each of the related subjects for the appearances by connecting the respective coordinates of the image inputs coordinates;
• finding the minimum distances between the target subject path and each of the related subject path that satisfies a pre-determined minimum distance threshold so as to determine which are the one or more minimum points on the respective paths that are closest to the sections that form the respective minimum distances;
• connecting the one or more minimum points to determine the potential region of interest of the co-appearances;
• determining, in response to determining that there is at least one minimum distance between the target subject path and each of the related subject path that satisfies the pre-determined minimum distance threshold, an earliest timestamp and a last timestamp from the determined timestamps of the first and last appearances of the target subject and each of the related subject so as to determine the duration of interest of the respective co-appearances, wherein the set of coordinates of the two or more appearances of the target subject defining a first path, and the related subject relating to the target subject, the set of coordinates of the two or more appearances of the related subject defining a second path;
• determining one or more minimum distances between the first path and the second path so as to determine at least a region of interest;
• determining a timestamp of a first appearance and a timestamp of a last appearance of the target subject;
• and
• determining a timestamp of a first appearance and a timestamp of a last appearance of the related subject when it is determined that at least one of the one or more minimum distances between the first path and the second path is within a predetermined distance so as to determine a duration of interest.

A non-transitory computer-readable medium storing a program that causes a processor to:

• receive a plurality of image inputs;
• identify one or more of a characteristic information from each of the plurality of image inputs;
• determine if each of the one or more identified characteristic information is likely to correspond to a target subject characteristic information which was stored in a database;
• retrieve one or more image inputs and their corresponding location coordinates and timestamps relating to the characteristic information that is likely to correspond to the target subject characteristic information upon the determination that at least one identified characteristic information is likely to correspond to a target subject characteristic information;
• determine one or more related subjects that appears within a pre-determined search period;
• construct paths for the target subject and each of the related subjects for the appearances by connecting the respective coordinates of the image inputs coordinates;
• find the minimum distances between the target subject path and each of the related subject path that satisfies a pre-determined minimum distance threshold so as to determine which are the one or more minimum points on the respective paths that are closest to the sections that form the respective minimum distances;
• connect the one or more minimum points to determine the potential region of interest of the co-appearances;
• determine, in response to determining that there is at least one minimum distance between the target subject path and each of the related subject path that satisfies the pre-determined minimum distance threshold, an earliest timestamp and a last timestamp from the determined timestamps of the first and last appearances of the target subject and each of the related subject so as to determine the duration of interest of the respective co-appearances, wherein the set of coordinates of the two or more appearances of the target subject defining a first path, and the related subject relating to the target subject, the set of coordinates of the two or more appearances of the related subject defining a second path;
• determine one or more minimum distances between the first path and the second path so as to determine at least a region of interest;
• determine a timestamp of a first appearance and a timestamp of a last appearance of the target subject;
• and
• determine a timestamp of a first appearance and a timestamp of a last appearance of the related subject when it is determined that at least one of the one or more minimum distances between the first path and the second path is within a predetermined distance so as to determine a duration of interest.