Focal Loss explained for Object Detection
This article explained Focal Loss in a simple way to understand how it can work. The paper is here.
Problem
Got this error when I build DockerFile
...
W: GPG error: https://developer.download.nvidia.cn/compute/cuda/repos/ubuntu1804/x86_64 InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY A4B469963BF863CC
E: The repository 'https://developer.download.nvidia.com/compute/cuda/repos/ubuntu1804/x86_64 InRelease' is not signed.Reason
Due to a key update in the CUDA Linux GPG repository: Nvidia has updated the gpg key, you should update gpg key to handle this!