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https://github.com/sacmehta/ESPNetv2
A light-weight, power efficient, and general purpose convolutional neural network
https://github.com/sacmehta/ESPNetv2
cnn convolutional-neural-networks deep-learning efficient imagenet lightweight machine-learning pytorch semantic-segmentation
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A light-weight, power efficient, and general purpose convolutional neural network
- Host: GitHub
- URL: https://github.com/sacmehta/ESPNetv2
- Owner: sacmehta
- License: mit
- Created: 2018-11-20T17:21:15.000Z (about 6 years ago)
- Default Branch: master
- Last Pushed: 2021-01-29T00:27:38.000Z (almost 4 years ago)
- Last Synced: 2024-08-01T20:36:42.225Z (4 months ago)
- Topics: cnn, convolutional-neural-networks, deep-learning, efficient, imagenet, lightweight, machine-learning, pytorch, semantic-segmentation
- Language: Python
- Size: 42.2 MB
- Stars: 443
- Watchers: 17
- Forks: 70
- Open Issues: 2
-
Metadata Files:
- Readme: README.md
- License: LICENSE
Awesome Lists containing this project
- awesome-computer-vision-papers - 2019CVPR
- awesome-AutoML-and-Lightweight-Models - sacmehta/ESPNetv2
README
# ESPNetv2: A Light-weight, Power Efficient, and General Purpose Convolutional Neural Network
**IMPORTANT NOTE 1 (7 June, 2019)**: We have released new code base that supports several datasets and models, including ESPNetv2. Please see [here](https://github.com/sacmehta/EdgeNets) for more details.
**IMPORTANT NOTE 2 (7 June, 2019)**: This repository is obsolete and we are not maintaining it anymore.
This repository contains the source code of our paper, [ESPNetv2](https://arxiv.org/abs/1811.11431) which is accepted for publication at CVPR'19.
***Note:*** New segmentation models for the PASCAL VOC and the Cityscapes are coming soon. Our new models achieves mIOU of [68.0](http://host.robots.ox.ac.uk:8080/anonymous/DAMVRR.html) and [66.15](https://www.cityscapes-dataset.com/anonymous-results/?id=2267c613d55dd75d5301850c913b1507bf2f10586ca73eb8ebcf357cdcf3e036) on the PASCAL VOC and the Cityscapes test sets, respectively.
Real-time semantic segmentation using ESPNetv2 on iPhone7 (see EdgeNets for details)
## Comparison with SOTA methods
Compared to state-of-the-art efficient networks, our network delivers competitive performance while being much more **power efficient**. Sample results are shown in below figure. For more details, please read our paper.
FLOPs vs. accuracy on the ImageNet dataset
Power consumption on TX2 device
If you find our project useful in your research, please consider citing:
```
@inproceedings{mehta2019espnetv2,
title={ESPNetv2: A Light-weight, Power Efficient, and General Purpose Convolutional Neural Network},
author={Sachin Mehta and Mohammad Rastegari and Linda Shapiro and Hannaneh Hajishirzi},
booktitle={CVPR},
year={2019}
}
@inproceedings{mehta2018espnet,
title={ESPNet: Efficient Spatial Pyramid of Dilated Convolutions for Semantic Segmentation},
author={Sachin Mehta and Mohammad Rastegari and Anat Caspi and Linda Shapiro and Hannaneh Hajishirzi},
booktitle={ECCV},
year={2018}
}
```
## Structure
This repository contains source code and pretrained for the following:
* **Object classification:** We provide source code along with pre-trained models at different network complexities
for the ImageNet dataset. Click [here](imagenet) for more details.
* **Semantic segmentation:** We provide source code along with pre-trained models on the Cityscapes dataset. Check [here](segmentation) for more details.
## Requirements
To run this repository, you should have following softwares installed:
* PyTorch - We tested with v0.4.1
* OpenCV - We tested with version 3.4.3
* Python3 - Our code is written in Python3. We recommend to use [Anaconda](https://www.anaconda.com/) for the same.
## Instructions to install Pytorch and OpenCV with Anaconda
Assuming that you have installed Anaconda successfully, you can follow the following instructions to install the packeges:
### PyTorch
```
conda install pytorch torchvision -c pytorch
```
Once installed, run the following commands in your terminal to verify the version:
```
import torch
torch.__version__
```
This should print something like this `0.4.1.post2`.
If your version is different, then follow PyTorch website [here](https://pytorch.org/) for more details.
### OpenCV
```
conda install pip
pip install --upgrade pip
pip install opencv-python
```
Once installed, run the following commands in your terminal to verify the version:
```
import cv2
cv2.__version__
```
This should print something like this `3.4.3`.
## Implementation note
You will see that `EESP` unit, the core building block of the ESPNetv2 architecture, has a `for` loop to process the input at different dilation rates.
You can parallelize it using **Streams** in PyTorch. It improves the inference speed.
A snippet to parallelize a `for` loop in pytorch is shown below:
```
# Sequential version
output = []
a = torch.randn(1, 3, 10, 10)
for i in range(4):
output.append(a)
torch.cat(output, 1)
```
```
# Parallel version
num_branches = 4
streams = [(idx, torch.cuda.Stream()) for idx in range(num_branches)]
output = []
a = torch.randn(1, 3, 10, 10)
for idx, s in streams:
with torch.cuda.stream(s):
output.append(a)
torch.cuda.synchronize()
torch.cat(output, 1)
```
**Note:**
* we have used above strategy to measure inference related statistics, including power consumption and run time on a single GPU.
* We have not tested it (for training as well as inference) across multiple GPUs. If you want to use Streams and facing issues, please use PyTorch forums to resolve your queries.