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TorchScript, ONNX, CoreML Export

📚 This guide explains how to export a trained YOLOv5 🚀 model from PyTorch to ONNX and TorchScript formats.

Before You Start

Clone this repo and install requirements.txt dependencies, including Python>=3.8 and PyTorch==1.7.

git clone https://github.com/ultralytics/yolov5  # clone repo
cd yolov5
pip install -r requirements.txt  # base requirements
pip install coremltools>=4.1 onnx>=1.9.0 scikit-learn==0.19.2  # export requirements

Export a Trained YOLOv5 Model

This command exports a pretrained YOLOv5s model to ONNX, TorchScript and CoreML formats. yolov5s.pt is the lightest and fastest model available. Other options are yolov5m.pt, yolov5l.pt and yolov5x.pt, or you own checkpoint from training a custom dataset runs/exp0/weights/best.pt. For details on all available models please see our README table.

python models/export.py --weights yolov5s.pt --img 640 --batch 1  # export at 640x640 with batch size 1

Output:

Namespace(batch_size=1, device='cpu', dynamic=False, half=False, img_size=[640, 640], include=['torchscript', 'onnx', 'coreml'], inplace=False, optimize=False, simplify=False, train=True, weights='./yolov5s.pt')
YOLOv5 🚀 v5.0-87-gf12cef8 torch 1.8.1+cu101 CPU

Fusing layers... 
Model Summary: 224 layers, 7266973 parameters, 0 gradients

PyTorch: starting from ./yolov5s.pt (14.8 MB)

TorchScript: starting export with torch 1.8.1+cu101...
TorchScript: export success, saved as ./yolov5s.torchscript.pt (29.4 MB)

ONNX: starting export with onnx 1.9.0...
ONNX: export success, saved as ./yolov5s.onnx (29.1 MB)

CoreML: starting export with coremltools 4.1...
CoreML: export success, saved as ./yolov5s.mlmodel (29.1 MB)

Export complete (10.40s). Visualize with https://github.com/lutzroeder/netron.

The 3 exported models will be saved alongside the original PyTorch model:

Netron Viewer is recommended for visualizing exported models:

TensorRT Deployment

For deployment of YOLOv5 from PyTorch *.pt weights to NVIDIA TensorRT see https://github.com/wang-xinyu/tensorrtx.

Environments

YOLOv5 may be run in any of the following up-to-date verified environments (with all dependencies including CUDA/CUDNN, Python and PyTorch preinstalled):

Status

CI CPU testing

If this badge is green, all YOLOv5 GitHub Actions Continuous Integration (CI) tests are currently passing. CI tests verify correct operation of YOLOv5 training (train.py), testing (test.py), inference (detect.py) and export (export.py) on MacOS, Windows, and Ubuntu every 24 hours and on every commit.