使用 customvision.ai/.NET 5 在 Raspberry PI 上进行对象检测

Question

We have written a x-plat worker service using .NET 5 that is running on a Raspberry PI 4 (Raspberry Pi OS). We have trained a custom vision object detection model on customvision.ai, exported it to ONNX and it all works well on Windows.

We are now struggling to get it running on the Pi. The ML.NET bits does not seem to work on the Pi. We're getting (with target runtime "linux-arm"):

Microsoft.ML currently supports 'x64' and 'x86' processor architectures. Please ensure your application is targeting 'x64' or 'x86'

We've searched hi and low for any working examples. We've also tried to export to Tensorflow format and explore Tensorflow.NET without any success.

Can anyone point to an example that is consuming a customvision.ai generated model in .NET Core/5 on a Raspberry PI? We are extending an existing prototype and would like to avoid rewriting it all in Python/C++ or create out of process calls.

Versions: ML.NET 1.6, Microsoft.ML.OnnxRuntime 1.8.1

Many thanks,

Mansos

Answer 1

您是否正在运行 Uno Platform 应用程序以从 Pi4 中的相机模块（或 USB 网络摄像头）捕获图片并运行 ML.Net？

Answer 2

Just incase someone else lands here...

The release ML.Net NuGets (mid Dec 2021) now have support for linux-aarch64, linux-arm, linux-arm64, Windows-x64 etc.

If you're still interested I have have a couple of blog posts about my "learning journey" getting a pretrained ONNX model working on RPI4B + Bullseye and ASUS PE100A + Ubuntu

@KiwiBryn