Face recognition system, face recognition method and face recognition program

A face recognition method to be executed by a computer, wherein the method comprising:

• a camera image capturing step in which a monitor camera continuously captures a plurality of captured images of a given monitoring space at a given angle of view;
• a first face recognition processing step for continuously performing face recognition by using a first threshold value to detect a face region on each of the captured images, and transmitting each of the captured images on which the face region has been detected;
• a second face recognition processing step for performing face recognition in order to detect a face image by using a second threshold value which is higher than the first threshold value on each of the captured images transmitted from the first face recognition processing step;
• a coordinate of barycentric position determining step for determining a coordinate of a barycentric position of each of the detected face regions which were detected by the first face recognition processing step;
• a point mask learning step for, when the second face recognition processing step cannot recognize a face image on one of the captured images transmitted from the first face recognition processing step, storing the coordinate of the barycentric position determined by the barycentric position determining step as a new point mask coordinate data into a storage device;
• a point mask check processing step for, when the first face recognition processing step detects a face region on one of the captured images, checking if there is a same coordinate data with the coordinate of the barycentric position determined by the coordinate of barycentric position determining step among the point mask coordinates stored in the storage device, and in a case when the same coordinate data is found, stopping the first face recognition processing step from transmitting the captured image on which the face region has been detected to the second face recognition processing step;
• a face recognition result output step of outputting a face recognition result when the second face recognition processing step successfully recognizes a face and an automatic reception processing step of displaying on a monitor screen a welcome message corresponding to the face detection by the first face recognition processing step and a welcome message corresponding to an attribute of a person specified by a face authentication processing step.

A non-transitory computer-readable medium containing program instructions for face recognition, wherein execution of the program instructions by one or more processors of a computer system causes the one or more processors to carry out:

• a camera image capturing step in which a monitor camera continuously captures a plurality of captured images of a given monitoring space at a given angle of view;
• a first face recognition processing step for continuously performing face recognition by using a first threshold value to detect a face region on each of the captured images, and transmitting each of the captured images on which the face region has been detected;
• a second face recognition processing step for performing face recognition in order to detect a face image by using a second threshold value which is higher than the first threshold value by using a second threshold value which is higher than the first threshold value on each of the captured images transmitted from the first face recognition processing step;
• a coordinate of barycentric position determining step for determining a coordinate of a barycentric position of each of the detected face regions which were detected by the first face recognition processing step;
• a point mask learning step for, when the second face recognition processing step cannot recognize a face image on one of the captured images transmitted from the first face recognition processing step, storing the coordinate of the barycentric position determined by the barycentric position determining step as a new point mask coordinate data into a storage device;
• a point mask check processing step for, when the first face recognition processing step detects a face region on one of the captured images, checking if there is a same barycentric coordinate data with the coordinate of the barycentric position determined by the coordinate of barycentric position determining step among the point mask coordinate data stored in the storage device, and in a case when the same coordinate data is found, stopping the first face recognition processing step from transmitting the captured image on which the face region has been detected to the second face recognition processing step;
• a face recognition result output step of outputting a face recognition result when the second face recognition processing step successfully recognizes a face and an automatic reception processing step of displaying on a monitor screen a welcome message corresponding to the face detection by the first face recognition processing step and a welcome message corresponding to an attribute of a person specified by a face authentication processing step.