| 摘要 |
PROBLEM TO BE SOLVED: To provide a leaving bed detecting device which may be flexibly applied to movement from a bed, and may comprehends patient's action from an image of a slow frame rate less than 30 fps to determine leaving bed with small calculation amount.SOLUTION: Leaving bed detecting means 2 comprises: an image generation part 21 outputting image frames successive in time dependent manner based on a photo image from a camera 1; a mobile body extracting part 22 extracting a mobile body from the successive image frame; a gravity center calculation part 23 calculating the gravity center position of the extracted mobile body; and a leaving bed determining part 24 observing the gravity center position relatively to a determination line L1 preset on the image frame and determining the generation of leaving bed when the movement of the gravity center to cross with the determination line L1 is detected. The gravity center calculation part 23 generates one dimensional histogram from the image of the mobile body.SELECTED DRAWING: Figure 1 |
