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nickinack / Occupancy-Estimation

Low-Resolution Overhead Thermal Tripwire Configuration for Occupancy Estimation
MIT License
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What is mean matrix ? #1

Open NguyenThaiHoc1 opened 3 years ago

NguyenThaiHoc1 commented 3 years ago

Hi Author

I'm interested in about your code. But I confused some code that you writter

what is about mean matrix and Why you can create like this or you based on ?

Localtion file code https://github.com/nickinack/Occupancy-Estimation/blob/main/src/bs.py

Thanks you for contribute Thai Hoc

nickinack commented 3 years ago

Hey! I hope you are doing well. The mean matrix is used to calculate the running gaussian average. In the author's approach, instead of thresholding temperature values, we model the background temperature of each pixel by a Gaussian pdf and apply a threshold to the temperature probabilities. Initially, since our system may be disturbed, we tend to take a mean of the first 25-30 frames. Once we are done with that, we go on to take the running gaussian average and update the mean at every background location.