protobuf
sudo apt-get install protobuf-compiler libprotobuf-dev
vulkan-drivers
sudo apt install mesa-vulkan-drivers
opencv
sudo apt install libopencv-dev python3-opencv
ncnn
git clone https://github.com/Tencent/ncnn.git
cd ncnn
git submodule update --init
cd -
mnist-ncnn
mkdir build
cmake -DNCNN_VULKAN=ON -DNCNN_SYSTEM_GLSLANG=ON ..
make -j8
cd src
./mnist ../../iamge/8.png