This repository is a simple pytorch implementation of CornerNet: Detecting Objects as Paired Keypoints, some of the code is taken from the official implementation.
As the name says, this version is simple and easy to read, all the complicated parts (dataloader, hourglass, training loop, etc) are all rewrote in a simpler way.
By the way the support of nn.parallel.DistributedDataParallel is also added, so this implementation trains considerably faster than the official code.
Enjoy!
Disable cudnn batch normalization.
Open torch/nn/functional.py
and find the line with torch.batch_norm
and replace the torch.backends.cudnn.enabled
with False
.
Clone this repo:
CornerNet_ROOT=/path/to/clone/CornerNet
git clone https://github.com/zzzxxxttt/pytorch_simple_CornerNet $CornerNet_ROOT
Install COCOAPI (the cocoapi in this repo is modified to work with python3):
cd $CornerNet_ROOT/lib/cocoapi/PythonAPI
make
python setup.py install --user
Compile corner pooling.
If you are using pytorch 0.4.1, rename $CornerNet_ROOT/lib/cpool_old
to $CornerNet_ROOT/lib/cpool
, otherwise rename $CornerNet_ROOT/lib/cpool_new
to $CornerNet_ROOT/lib/cpool
.
cd $CornerNet_ROOT/lib/cpool
python setup.py install --user
Compile NMS.
cd $CornerNet_ROOT/lib/nms
make
For COCO training, Download COCO dataset and put annotations
, train2017
, val2017
, test2017
(or create symlinks) into $CornerNet_ROOT/data/coco
python -m torch.distributed.launch --nproc_per_node NUM_GPUS train.py --dist \
--log_name coco_hg_511_ddp \
--dataset coco \
--arch large_hourglass \
--lr 5e-4 \
--lr_step 90,120 \
--batch_size 48 \
--num_epochs 200 \
--num_workers 2
python test.py --log_name coco_hg_511_dp \
--dataset coco \
--arch large_hourglass
# flip test
python test.py --log_name coco_hg_511_dp \
--dataset coco \
--arch large_hourglass \
--test_flip
# multi scale test
python test.py --log_name coco_hg_511_dp \
--dataset coco \
--arch large_hourglass \
--test_flip \
--test_scales 0.5,0.75,1,1.25,1.5
Model | Training image size | mAP |
---|---|---|
Hourglass-52 (DDP) | 511 | 35.4/37.1/38.7 |
Hourglass-104 (DDP) | 511 | 39.4/40.9/42.0 |