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NanoDet NCNN Android Demo

This repo is an Android object detection demo of NanoDet using Tencent's NCNN framework.

Tutorial

Step1.

Download ncnn-android-vulkan.zip from ncnn repo or build ncnn-android from source.

Step2.

Unzip ncnn-android-vulkan.zip into demo_android_ncnn/app/src/main/cpp or change the ncnn_DIR path to yours in demo_android_ncnn/app/src/main/cpp/CMakeLists.txt

# e.g. change to `ncnn-20211208-android-vulkan` if download version 200211208
set(ncnn_DIR ${CMAKE_SOURCE_DIR}/ncnn-20211208-android-vulkan/${ANDROID_ABI}/lib/cmake/ncnn)

Step3.

Copy the NanoDet ncnn model file and rename to nanodet.param and nanodet.bin from models folder into demo_android_ncnn/app/src/main/assets

If you want to run yolov4-tiny and yolov5s, download them and also put in demo_android_ncnn/app/src/main/assets.

Step4.

Open demo_android_ncnn folder with Android Studio and then build it.

Screenshot

Notice

  • The FPS in the app includes pre-process, post-process and visualization, not equal to the model inference time.

  • If meet error like No version of NDK matched the requested version, set android { ndkVersion to your ndk version.

  • If you want to use custom model, remember to change the hyperparams in demo_android_ncnn/app/src/main/cpp/NanoDet.h the same with your training config.

Reference