Person-judging device, method, and program

A person judging method for judging whether or not an object appearing in an image based on a video signal from an external camera is a person, comprising:

• referencing an obstruction storage which stores information indicating an area of an obstruction on the image;
• when a portion of the object extracted from the image is hidden by the obstruction, assuming that a potential range of grounding points where the object touches a reference face on the image is the area of the obstruction which is stored in the obstruction storage;
• based on the assumed range and the correlation between the height of a person and the size and position of the head portion that are previously provided, calculating a potential range of the head portion on the image by assuming that a portion farthest from the grounding points of the object is the head portion of the person;
• and
• judging whether or not an area including a shape corresponding to the head portion exists in the range of the calculated head portion.

A non-transitory recording medium recorded with a program used in a computer that judges whether or not an object appearing in an image based on a video signal from an external camera is a person, the program being for causing the computer to execute the processes of:

• referencing an obstruction storage which stores information indicating an area of an obstruction on the image obstruction on the image;
• when a portion of the object extracted from the image is hidden by the obstruction, assuming that a potential range of grounding points where the object touches a reference face on the image is the area of the obstruction which is stored in the obstruction storage;
• based on the assumed range and the correlation between the height of a person and the size and position of the head portion that are previously provided, calculating a potential range of the head portion on the image by assuming that a portion farthest from the grounding points of the object is the head portion of the person;
• and
• judging whether or not an area including a shape corresponding to the head portion exists in the range of the calculated head portion.