Export CoreML

Overview

This branch contains our code to export to CoreML models. The /model folder is the same as the master branch. The main exporting logics are in export_coreml.py.

At the time of this writing, CoreML's ResizeBilinear and Upsample ops don't not support dynamic scale parameters, so the downsample_ratio hyperparameter must be hardcoded.

Our export script is written to have input size fixed. The output coreml models require iOS14+, MacOS11+. If you have other requirements, feel free to modify the export script. Contributions are welcomed.

Export Yourself

The following procedures were used to generate our CoreML models.

1. Install dependencies

pip install -r requirements.txt

2. Use the export script. You can change the resolution and downsample-ratio to fit your need. You can change quantization to one of [8, 16, 32], denoting int8, fp16, and fp32.

python export_coreml.py \
    --model-variant mobilenetv3 \
    --checkpoint rvm_mobilenetv3.pth \
    --resolution 1920 1080 \
    --downsample-ratio 0.25 \
    --quantize-nbits 16 \
    --output model.mlmodel