DDRNet.pytorch

This is the unofficial code of Deep Dual-resolution Networks for Real-time and Accurate Semantic Segmentation of Road Scenes. which achieve state-of-the-art trade-off between accuracy and speed on cityscapes and camvid, without using inference acceleration and extra data!on single 2080Ti GPU, DDRNet-23-slim yields 77.4% mIoU at 109 FPS on Cityscapes test set and 74.4% mIoU at 230 FPS on CamVid test set.

The code mainly borrows from HRNet-Semantic-Segmentation OCR and the official repository, thanks for their work.

requirements

Here I list the software and hardware used in my experiment

  • pytorch==1.7.0
  • 3080*2
  • cuda==11.1

Quick start

0. Data preparation

You need to download the Cityscapesdatasets. and rename the folder cityscapes, then put the data under data folder.

└── data
  ├── cityscapes
  └── list

1. Pretrained model

download the pretrained model on imagenet or the segmentation model from the official,and put the files in ${PROJECT}/pretrained_models folder

VAL

use the official pretrained model and our eval.py code. with ydhongHIT's advice now can reach the same accuracy in the paper. Thanks.

cd ${PROJECT}
python tools/eval.py --cfg experiments/cityscapes/ddrnet23_slim.yaml
model Train Set Test Set OHEM Multi-scale Flip mIoU Link
DDRNet23_slim unknown eval Yes No No 77.83 official
DDRNet23_slim unknown eval Yes No Yes 78.42 official
DDRNet23 unknown eval Yes No No 79.51 official
DDRNet23 unknown eval Yes No Yes 79.98 official

Note

  • with the ALIGN_CORNERS: false in ***.yaml will reach higher accuracy.

TRAIN

download the imagenet pretrained model, and then train the model with 2 nvidia-3080

cd ${PROJECT}
python -m torch.distributed.launch --nproc_per_node=2 tools/train.py --cfg experiments/cityscapes/ddrnet23_slim.yaml

the own trained model coming soon

OWN model

model Train Set Test Set OHEM Multi-scale Flip mIoU Link
DDRNet23_slim train eval Yes No Yes 77.77 Baidu/password:it2s
DDRNet23_slim train eval Yes Yes Yes 79.57 Baidu/password:it2s
DDRNet23 train eval Yes No Yes ~ None
DDRNet39 train eval Yes No Yes ~ None

Note

  • set the ALIGN_CORNERS: true in ***.yaml, because i use the default setting in HRNet-Semantic-Segmentation OCR.
  • Multi-scale with scales: 0.5,0.75,1.0,1.25,1.5,1.75. it runs too slow.
  • from ydhongHIT, can change the align_corners=True with better performance, the default option is False

GitHub

https://github.com/chenjun2hao/DDRNet.pytorch