hzy_19

This is because you don't have opencv library. Try to install it first: `pip install opencv-python`

I have met the same issue. I trained my own data from scratch and got nothing output. My data has three classes, that is 0, 1 and 2, where 0...

Well, the code can run but it learnt nothing. When I start training, it has outputs other than 1. But later on the output is all 1.