SMOKE DETECTING APPARATUS
First Claim
1. A smoke detecting apparatus for detecting occurrence of smoke by subjecting an image captured by a monitoring camera to image processing, the smoke detecting apparatus comprising:
- an image memory for storing a plurality of images captured by the monitoring camera in a time series; and
a smoke detection area selecting portion for calculating a luminance histogram of the same pixel for each predetermined pixel a plurality of times in a past predetermined period based on the plurality of images stored in the image memory, detecting presence or absence of a luminance value that has been newly generated due to occurrence of one of an intrusive object and smoke based on the luminance histogram, and identifying candidate regions to be subjected to the image processing.
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Accused Products
Abstract
Provided is a smoke detecting apparatus capable of detecting occurrence of smoke at high sensitivity while suppressing an effect of disturbance. The smoke detecting apparatus for detecting occurrence of smoke by subjecting an image captured by a monitoring camera to image processing includes: an image memory (10) for storing a plurality of images captured by the monitoring camera in a time series; and a smoke detection area selecting portion (20) for calculating a luminance histogram of the same pixel for each predetermined pixel a plurality of times in a past predetermined period based on the plurality of images stored in the image memory (10), detecting presence or absence of a luminance value that has been newly generated due to occurrence of one of an intrusive object and smoke based on the luminance histogram, and identifying candidate regions to be subjected to the image processing.
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Citations
9 Claims
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1. A smoke detecting apparatus for detecting occurrence of smoke by subjecting an image captured by a monitoring camera to image processing, the smoke detecting apparatus comprising:
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an image memory for storing a plurality of images captured by the monitoring camera in a time series; and a smoke detection area selecting portion for calculating a luminance histogram of the same pixel for each predetermined pixel a plurality of times in a past predetermined period based on the plurality of images stored in the image memory, detecting presence or absence of a luminance value that has been newly generated due to occurrence of one of an intrusive object and smoke based on the luminance histogram, and identifying candidate regions to be subjected to the image processing. - View Dependent Claims (2, 3, 4, 5)
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6. A smoke detecting apparatus, comprising:
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smoke feature value calculating means for extracting a feature value regarding smoke for each of a plurality of regions set in an image captured by a monitoring camera; a storage portion storing a plurality of predetermined reference judgment values having a plurality of detection sensitivities for the each of the plurality of regions, for judging presence or absence of smoke occurrence for the each of the plurality of regions; region-to-region sensitivity setting means for setting a desired detection sensitivity for the each of the plurality of regions depending on an object to be monitored by the monitoring camera; and smoke judging means for retrieving a predetermined reference judgment value corresponding to the desired detection sensitivity set by the region-to-region sensitivity setting means from among the plurality of predetermined reference judgment values stored in the storage portion, comparing the retrieved predetermined reference judgment value with the feature value extracted by the smoke feature value calculating means, and detecting smoke occurrence at the desired detection sensitivity for the each of the plurality of regions based on a result of the comparison, for the each of the plurality of regions. - View Dependent Claims (7, 8, 9)
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Specification