H - Electricity – 04 – N
Patent
H - Electricity
04
N
350/32
H04N 7/18 (2006.01) G08B 13/194 (2006.01) G08B 13/196 (2006.01)
Patent
CA 1159552
ABSTRACT OF THE DISCLOSURE A place scenery surveillance method has the features that upon photosensing a place scenery under sur- veillance by a video camera, the image signal from the video camera is converted to data, the deta is stored in a memory as first data and then compared with previous data which was prepared and stored in a memory at a previous surveillance period to only generate an alarm signal when there is a dif- ference between both data, and thereafter the previous data are erased and replaced by the first data in the memory and then wait until the next image data is derived from said video camera, to thereby repeat the above mentioned operation at a predetermined time interval. A place scenery surveillance apparatus carrying out the above method has the construction whereas a video camera watches place sceneries or the like; a data conversion circuit converts image signals responding to the watched place scenery by the video camera into data; a first memory memorizes the data from the data conversion circuit therein; a second memory memorizes previous data from said first memory therein; a comparator compares the data of the first memory with the previous data of the second memory; an erasure erases the previous data of the second memory; first to fifth switches are respectively inserted between the video camera and the data conversion circuit, the data conversion circuit and the first memory, the first and second memories and the comparator, the erasure and the second memory, and the first memory and the second memory; a control section controls the ON and OFF of the first to fifth switches in time sharing manner; and an alarm generator generates an alarm upon receiv- ing the output from the comparator.
377218
Gowling Lafleur Henderson Llp
Hajime Industries Ltd.
LandOfFree
Surveillance method and apparatus does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Surveillance method and apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Surveillance method and apparatus will most certainly appreciate the feedback.
Profile ID: LFCA-PAI-O-574301