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This is a PyTorch reimplementation of Holistically-nested Edge Detection (HED). The code is evaluated on Python 3.6 with PyTorch 1.0 (CUDA9, CUDNN7) and MATLAB R2018b.

1. Clone the repository:

   git clone https://github.com/xwjabc/hed.git

2. Download and extract the data:

   cd hed
   wget https://cseweb.ucsd.edu/~weijian/static/datasets/hed/hed-data.tar
   tar xvf ./hed-data.tar

1. Train:

   python hed.py --vgg16_caffe ./data/5stage-vgg.py36pickle

   The results are in output folder. In the default settings, the HED model is trained for 40 epochs, which takes ~27hrs with one NVIDIA Geforce GTX Titan X (Maxwell).

2. Evaluate:

   cd eval
   (echo "data_dir = '../output/epoch-39-test'"; cat eval_edge.m)|matlab -nodisplay -nodesktop -nosplash

   The evaluation process takes ~7hrs with Intel Core i7-5930K CPU @ 3.50GHz.

Besides, based on my observation, the evaluated performance is somewhat stable after 5 epochs (5 epochs: ODS=0.788 OIS=0.808 vs. 40 epochs: ODS=0.787 OIS=0.807).

1. Evaluate the my pre-trained version:

   python hed.py --checkpoint ./data/hed_checkpoint.pt --output ./output-mypretrain --test
   cd eval
   (echo "data_dir = '../output-mypretrain/test'"; cat eval_edge.m)|matlab -nodisplay -nodesktop -nosplash

   The result should be similar to ODS=0.787 OIS=0.807.

2. Evaluate the official pre-trained version:

   python hed.py --caffe_model ./data/hed_pretrained_bsds.py36pickle --output ./output-officialpretrain --test
   cd eval
   (echo "data_dir = '../output-officialpretrain/test'"; cat eval_edge.m)|matlab -nodisplay -nodesktop -nosplash

   The result should be similar to ODS=0.788 OIS=0.806.

This reimplementation is based on lots of prior works. Thanks to Saining for the original Caffe implementation. Thanks to @meteorshowers for a PyTorch implementation where I adopt most of the code from. Thanks to @jmbuena for a fixed version of Piotr's Toolbox. Thanks to Berkeley Institute for Data Science which provides a mirror of BSDS500 dataset (the original link to the dataset seems broken).