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bdtinc / maskcam

Jetson Nano-based smart camera system that measures crowd face mask usage in real-time.
MIT License
243 stars 83 forks source link

Face Detection Max Face Size #10

Closed manb911 closed 2 years ago

manb911 commented 3 years ago

There seems to be a threshold of maximum face size, when I get close enough to the camera seems like the detection doesn't see a face. Is there a size guide for the weight of Yolo Detection you are using? Thank you

DonBraulio commented 3 years ago

Hey @manb911 , that's a good catch. Since our camera is not intended to be used in a "webcam" setup, the vast majority of training images contained faces at a certain distance, as you would see on most real camera scenarios. So, even though there's no specific threshold for maximum face size, the detector won't work well in such cases. Unfortunately there's no quick fix that I can think of for that problem, other than retraining the model. Or, somehow resizing the model input, if you don't care that it will perform worse for distant faces.