| 摘要 |
PURPOSE: To accurately grasp an entry and exiting of a person into and from a room, etc., by extracting a body in motion from the difference between an image of an image signal obtained when the moving body is present and an image obtained when the moving body is absent. CONSTITUTION: An image processing part 11 consists of a differentiating circuit part 12 as an edge detecting means and a binarizing circuit part 13, and is connected to a differential binary image memory part 14. The differential binary image memory part 14 is connected to a CPU bus line 15. Then an initial memory part 16 which stores the state wherein the moving body 5 of the differential binary image memory part 14, an inter-image arithmetic part 17 which calculates the image difference between the initial memory part 16 and the differential image memory part 14 when the moving body 5 is not present, and a feature extracting circuit part 18 which extracts features from the shape of the image difference of the inter-image arithmetic part 17 are connected to a CPU bus line 15. Further, a state decision part 19 which decides the state of the extracted person 5 from the output of the feature extraction part 18 is connected to the CPU bus line 15. |
