Optical monitoring apparatus with image-based distance accommodation
First Claim
1. An optical monitoring system, comprising:
- a moving body detection sub-system that images a monitored region onto an optical image plane and detects a moving body from changes over time in the monitored region;
a speed detection sub-system that detects a speed of the moving body in the optical image plane;
a scale detection sub-system that detects a size for the moving body in the optical image plane; and
a moving body estimation sub-system that decides whether the moving body is a predetermined monitored subject based on the speed detected by the speed detection sub-system and the size detected by the scale detection sub-system, the moving body estimation sub-system having an actual scale estimation sub-system that determines an estimated actual size of the moving body based on the speed detected by the speed detection sub-system and the size detected by the scale detection sub-system, the moving body estimation sub-system deciding whether the moving body is the predetermined monitored subject based on the estimated actual size of the moving body.
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Abstract
An optical monitoring system is capable of automatically identifying whether a moving body is a monitored subject based upon information in an optical (i.e., video) image. A moving body detection sub-system images a monitored region and detects a moving body from changes over time in the image of the monitored region. A speed detection sub-system detects the speed of a moving body in the image plane (i.e., speed of the moving body image in the image plane). A scale detection sub-system detects the size of a moving body in the image plane (i.e., size of the moving body in the image plane). A moving body estimation sub-system decides whether a moving body is the monitored subject (e.g., a human being) based on the image plane speed detected by the speed detection sub-system and the image plane size detected by the scale detection sub-system.
14 Citations
22 Claims
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1. An optical monitoring system, comprising:
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a moving body detection sub-system that images a monitored region onto an optical image plane and detects a moving body from changes over time in the monitored region; a speed detection sub-system that detects a speed of the moving body in the optical image plane; a scale detection sub-system that detects a size for the moving body in the optical image plane; and a moving body estimation sub-system that decides whether the moving body is a predetermined monitored subject based on the speed detected by the speed detection sub-system and the size detected by the scale detection sub-system, the moving body estimation sub-system having an actual scale estimation sub-system that determines an estimated actual size of the moving body based on the speed detected by the speed detection sub-system and the size detected by the scale detection sub-system, the moving body estimation sub-system deciding whether the moving body is the predetermined monitored subject based on the estimated actual size of the moving body. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 14)
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10. An optical monitoring system, comprising:
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a moving body detection sub-system that images a monitored region onto an optical image plane and detects a moving body from changes over time in the monitored region; a position detection sub-system that detects a position of the moving body in the optical image plane; a scale detection sub-system that detects a size of the moving body in the optical image plane; and a moving body estimation sub-system that decides whether the moving body is a predetermined monitored subject based on the position detected by the position detection sub-system and the size detected by the scale detection sub-system, the moving body estimation sub-system including; a correlation relationship storage sub-system that stores correlation relationships between the position and size of predetermined moving bodies; and a class estimation sub-system that checks the position detected by the position detection sub-system and the size detected by the scale detection sub-system against the correlation relationships stored in the correlation relationship storage sub-system to estimate the class of the moving body and decides whether it is the predetermined monitored subject based on the estimated class of the moving body. - View Dependent Claims (11, 12, 13)
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15. An optical monitoring method, comprising:
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imaging a monitored region onto an optical image plane and detecting a moving body from changes over time in the monitored region; detecting a speed of the moving body in the optical image plane; detecting a size for the moving body in the optical image plane; deciding whether the moving body is a predetermined monitored subject based on the detected speed in the optical image plane and the detected size in the optical image plane; storing correlation relationships between an optical image plane speed and an optical image plane size for predetermined classes of moving bodies; comparing the detected speed in the optical image plane and the size detected in the optical image plane against the stored correlation relationships to estimate a class for the moving body; and deciding whether the moving body is the predetermined monitored subject based on the estimated class of the moving body. - View Dependent Claims (16, 17, 18)
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19. An optical monitoring method, comprising:
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imaging a monitored region onto an optical image plane and detecting a moving body from changes over time in the monitored region; detecting a position of the moving body in the optical image plane; detecting a size of the moving body in the optical image plane; deciding whether the moving body is a predetermined monitored subject based on the position detected in the optical image plane and the size detected in the optical image plane; determining an estimated actual size of the moving body based on the position detected in the optical image plane and the size detected in the optical image plane, and deciding whether the moving body is the predetermined monitored subject based on the estimated actual size of the moving body. - View Dependent Claims (20, 21, 22)
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Specification