JP2017068650A5 - - Google Patents

Claims (8)

An identification device for identifying individual subjects from images including a plurality of subjects photographed by a plurality of cameras,
Extraction means for extracting the foreground region of the image captured by each camera;
Projecting means for projecting a foreground area of an image captured by the camera on a predetermined plane based on an internal parameter and an external parameter of the camera and obtaining a projection area on the predetermined plane corresponding to the foreground area for each camera,
An assigning means for assigning an identifier to each of the projection areas corresponding to the foreground area of the image captured by each camera;
A determination unit that counts the number of overlaps of the projection areas on the predetermined plane and determines an area on the predetermined plane where the number of overlaps is equal to or greater than a threshold as a contact area between a subject and the predetermined plane;
For each contact area, the combination of identifiers of the projection area that is the origin of the contact area is determined, the same contact area of the combination is identified as the same subject, and the different contact areas of the combination are identified as different subjects Means,
An identification device for identifying individual subjects from images taken by a plurality of cameras . The identification device for identifying individual subjects from images captured by a plurality of cameras according to claim 1, wherein the predetermined plane is a ground surface or a floor surface. The number of subjects is determined based on the number of combinations of the identifiers, and when the number of subjects is smaller than a predetermined value, the foreground area extracted by the extracting unit is enlarged by a predetermined number of pixels, the projecting unit, the adding unit, The image photographed by a plurality of cameras according to claim 1, further comprising an error correction unit that causes the determination unit and the identification unit to perform processing again based on the enlarged foreground region. Identification device for identifying individual subjects from The identification device for identifying individual subjects from images taken by a plurality of cameras according to claim 3, wherein the predetermined number of pixels is one pixel. The number of subjects is determined based on the number of combinations of the identifiers, and when the number of subjects is greater than a predetermined value, the size of each foreground region corresponding to each projection region that is the origin of the contact region is obtained, 3. The plurality of error correction means according to claim 1, further comprising an error correction unit that determines that the contact area is not a subject when the minimum value is smaller than a value based on a value other than the minimum value . An identification device that identifies individual subjects from images captured by a camera . The value based on a value other than the minimum value is a value obtained by multiplying a median value or maximum value of the size by a predetermined coefficient, and each of the images captured by a plurality of cameras according to claim 5 . An identification device for identifying a subject . An identification method in an identification device for identifying individual subjects from images including a plurality of subjects photographed by a plurality of cameras,
An extraction step for extracting a foreground region of an image taken by each camera;
Projecting a foreground region of an image captured by the camera on each predetermined camera on a predetermined plane based on the internal parameters and external parameters of the camera, and obtaining a projection region on the predetermined plane corresponding to the foreground region;
An assigning step of assigning an identifier to each of the projection areas corresponding to the foreground area of the image captured by each camera;
A determination step of counting the number of overlaps of the projection areas on the predetermined plane, and determining an area on the predetermined plane where the number of overlaps is equal to or greater than a threshold as a contact area between a subject and the predetermined plane;
For each contact area, the combination of identifiers of the projection area that is the origin of the contact area is determined, the same contact area of the combination is identified as the same subject, and the different contact areas of the combination are identified as different subjects Steps,
An identification method for identifying individual subjects from images photographed by a plurality of cameras . A program for identifying an individual subject from images captured by a plurality of cameras, wherein the computer functions as the identification device according to claim 1.