JPWO2023079593A5 - Dirt determination device - Google Patents

Claims (4)

an acquisition unit that periodically acquires photographic data photographed by a surveillance camera;
an extraction unit that extracts a feature amount of the acquired photographic data;
an estimator that inputs information based on the extracted feature amounts into a learned model and outputs a degree of dirt on a lens of the surveillance camera;
When the degree of contamination becomes equal to or greater than the threshold value regarding the degree of contamination, and the degree of contamination does not become less than the threshold value even after a predetermined period of time has elapsed since the degree of contamination became equal to or greater than the threshold value, a certain level of contamination is applied to the lens. and a determination unit that determines that there is dirt .
The trained model includes a plurality of models,
Each of the plurality of models performs a learning process to output the degree of contamination when information based on the feature amount is input using a group of photographic data taken in one of a plurality of photographing environments. It is a model that was carried out,
The estimating unit is a dirt determination device that selects one of the plurality of models based on the output result of the dirt degree . The dirt determination device according to claim 1 , wherein the estimation unit selects a model that provides the smallest output result of the dirt degree from among the plurality of models. The dirt determination device is capable of setting execution modes including a first mode and a second mode,
The determination unit includes:
If the first mode is set, a determination is made every first cycle,
The dirt determination device according to claim 1 or 2 , wherein when the second mode is set, the determination is performed every second cycle that is longer than the first cycle. The photographic data is data in which the inside of an elevator car is photographed;
The dirt according to any one of claims 1 to 3 , wherein the degree of dirt changes depending on at least one of the dirt on the lens, the loading amount in the car, and the open/closed state of the door of the car. Judgment device.