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EP0595709A1
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Anomaly surveillance device
Assignee: Fujikura Ltd
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Filing: 1993-10-26
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Granted: —
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Expires: 2013-10-26
Abstract
Abstract An image signal which is output by a video camera not shown in the Figures is segregated into image data S2 and synchronous data S3 by the synchronizing segregation circuit 1. At each frame, image data S2 is sequentially stored in the image data multilayer memory 8 which consists of frame memories formed in a ring shape. When an anomalous phenomena (image) which includes this image data S2 is detected by the anomalous phenomena detecting device 2, then for image data S2 and anomalous image data S4, from a time immediately before the occurrence of an anomalous phenomena until the elapse of a prespecified period of time, maintenance and storage in the multilayer memory 8 for image data and in the multilayer memory 7 for extracted anomalous image data by the start/stop control circuit 6. Following this, the image data S2 and the anomalous image data S4 from immediately before the occurrence of an anomalous phenomena until the elapse of a prespecified period of time is forwarded to storage device 10 by the data transfer circuit 9. Based on the thus obtained images from before and after the occurrence of an anomalous phenomena, analysis and resolution of an anomalous phenomena occurring within a surveilled area may be carried out.
Inventors
- 👤 Akira Otsuki
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-05 23:31
CPC Classifications
H; H04; H04N; H04N17/00; H04N17/04; G; G08; G08B; G08B13/00; G08B13/18; G08B13/189; G08B13/194; G08B13/196; G08B13/19602; G08B13/19665; G08B13/19669; G08B13/19676
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
301 words
an anomaly surveillance device provided with: shooting means for shooting the surveillance area and outputting the shot image as image data; anomalous phenomena detecting means for detecting an anomalous image from said image data output by said shooting means and outputting the anomalous image as the anomalous image data; recording interval setting means for setting the recording interval for said image data output by said shooting means; segment setting means for setting the number of frames; cycling address generating means for generating a cycling address in accordance with the number of frames; anomalous image recording means consisting of a primary frame memory for the number of frames set by said segment setting means, said anomalous image recording means sequentially recording the anomalous image data output by said anomalous phenomena detection means in the frame memory indicated by said cycling address from among said primary frame memories, at each recording interval which is set by said recording interval setting means; image storing means consisting of a secondary frame memory for the number of frames set by said segment setting means, said image storing means sequentially storing the image data output by said shooting means in the frame memory indicated by said cycling address from among said secondary frame memories, at each recording interval set by the recording interval setting means; and control means wherein the number of valid frames with respect to the number of frames set by the segment setting means is set, said control means controlling the initiation and termination of the storing of anomalous image data by said anomalous image data storing means, and the initiation and termination of the storing of image data by said image storing means, in accordance with the number of valid frames, when an anomalous image is detected by said anomalous image detection means.
Claim 2
Dependent Claim
92 words
An anomaly surveillance device according to claim 1, wherein said anomalous phenomena detecting means is provided with: storing means for storing image data; reference image generating means for generating a reference image by uptaking the sequentially supplied images at prespecified time intervals, storing the images summed in the elapsed prespecified period of time, and averaging and outputting the summed image data which were output by the storing means; and subtracting means for subtracting and outputting the averaged images which were output by the reference image generating means from the sequentially supplied images.
Claim 3
Dependent Claim
105 words
An anomaly surveillance device according to claim 1, wherein the recording interval, the number of frames and the number of valid frames are set in accordance with the speed of the movement of the anomalous phenomena within the surveilled area, and wherein the recording interval is set to be small and the number of frames and the number of valid frames are set to be large in accordance with a high-speed anomalous phenomena, while the recording interval is set to be large and the number of frames and the number of valid frames are set to be small in accordance with a low-speed anomalous phenomena.
Claim 4
Dependent Claim
30 words
An anomaly surveillance device according to claim 1, wherein the recording interval is an integral multiply of the time interval in which the image data of one frame is output.
Claim 5
Dependent Claim
60 words
An anomaly surveillance device according to claim 1, wherein said anomalous image storing means and said image storing means are frame memories equipped with a plurality of blocks where one of said blocks consists of frame memories, the number of which is set by said segment setting means, and wherein, when an anomalous phenomena occurs, said blocks are changed over.
Claim 6
Dependent Claim
51 words
An anomaly surveillance device according to claim 1, wherein the anomalous phenomena is one of a cloud-to-ground electrical discharge, the movement of lava flows at the site of a volcanic eruption, the movement of individuals into and out of a dangerous facility, and the movement of traffic at a traffic facility.
Claim 7
Dependent Claim
43 words
An anomaly surveillance device according to claim 1, wherein the moving object constituting the anomalous phenomena to be detected is not limited-to any particular shape or condition, and is one which possess on screen light and dark contrast with respect to the background.
Claim 8
Dependent Claim
37 words
An anomaly surveillance device according to claim 1, wherein the shooting means is responsive to any of visible light, invisible light such as ultraviolet light and infrared light, X-rays, and lasers beams of a specified wave length.
References Cited (Backward Citations)
DE2834079B1
Cited
EP0261917A2
Cited
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