Tootfinder

Particle detection performance and Geant4 simulation with low-cost CMOS technology
M. Bonnett Del Alamo, R. Helaconde, C. Soncco, J. Bazo, A. M. Gago
https://arxiv.org/abs/2402.13993

Particle detection performance and Geant4 simulation with low-cost CMOS technology
We analyze the performance of an Omnivision OV5647 CMOS image sensor (5 Mp) for measuring the radiation emitted from Sr90 and Cs137 sources. Our experimental arrangement includes a Raspberry Pi 3 mini-computer for data taking, processed with Python and OpenCV libraries. We specify the camera settings to be sensitive to detecting electrons and photons. We also implement a detailed Geant4 simulation of the CMOS sensor and the radioactive sources. This simulation connects the deposited energy in t…

Today we are enjoying the problem with trying to do bird detection when your bird feeder has two blue tit sized ceramic birds on the edge.

Weirdly it only detects them randomly even though they're in every frame.

Doubly weirdly the Python OpenCV code is much more reliable about detecting birds than the Go OpenCV code using the same input and DNN model (but is awful for CPU usage - 500% compared to ~120% for the Go.)

(Tempted to invest in a Movidius NPU. Anyone us…

Today we are enjoying the problem with trying to do bird detection when your bird feeder has two blue tit sized ceramic birds on the edge.

Weirdly it only detects them randomly even though they're in every frame.

Doubly weirdly the Python OpenCV code is much more reliable about detecting birds than the Go OpenCV code using the same input and DNN model (but is awful for CPU usage - 500% compared to ~120% for the Go.)

(Tempted to invest in a Movidius NPU. Anyone us…