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---
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<div align="center">
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**HybridNets Network Architecture.**
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[](https://github.com/datvuthanh/HybridNets/blob/main/LICENSE)
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[](https://pytorch.org/get-started/locally/)
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[](https://www.python.org/downloads/)
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<br>
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<!-- [![Contributors][contributors-shield]][contributors-url]
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[![Forks][forks-shield]][forks-url]
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[![Stargazers][stars-shield]][stars-url]
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[![Issues][issues-shield]][issues-url] -->
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</div>
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> [**HybridNets: End-to-End Perception Network**](https://arxiv.org/abs/2203.09035)
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>
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> by Dat Vu, Bao Ngo, [Hung Phan](https://scholar.google.com/citations?user=V3paQH8AAAAJ&hl=vi&oi=ao)<sup> :email:</sup> [*FPT University*](https://uni.fpt.edu.vn/en-US/Default.aspx)
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>
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> (<sup>:email:</sup>) corresponding author.
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>
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> *arXiv technical report ([arXiv 2203.09035](https://arxiv.org/abs/2203.09035))*
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[](https://paperswithcode.com/sota/traffic-object-detection-on-bdd100k?p=hybridnets-end-to-end-perception-network-1)
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[](https://paperswithcode.com/sota/lane-detection-on-bdd100k?p=hybridnets-end-to-end-perception-network-1)
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<!-- TABLE OF CONTENTS -->
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<details>
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<summary>Table of Contents</summary>
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<ol>
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<li>
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<a href="#about-the-project">About The Project</a>
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<ul>
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<li><a href="#project-structure">Project Structure</a></li>
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</ul>
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</li>
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<li>
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<a href="#getting-started">Getting Started</a>
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<ul>
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<li><a href="#installation">Installation</a></li>
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<li><a href="#demo">Demo</a></li>
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</ul>
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</li>
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<li>
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<a href="#usage">Usage</a>
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<ul>
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<li><a href="#data-preparation">Data Preparation</a></li>
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<li><a href="#training">Training</a></li>
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</ul>
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</li>
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<li><a href="#training-tips">Training Tips</a></li>
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<li><a href="#results">Results</a></li>
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<li><a href="#license">License</a></li>
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<li><a href="#acknowledgements">Acknowledgements</a></li>
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<li><a href="#citation">Citation</a></li>
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</ol>
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</details>
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## About The Project
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<!-- #### <div align=center> **HybridNets** = **real-time** :stopwatch: * **state-of-the-art** :1st_place_medal: * (traffic object detection + drivable area segmentation + lane line detection) :motorway: </div> -->
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HybridNets is an end2end perception network for multi-tasks. Our work focused on traffic object detection, drivable area segmentation and lane detection. HybridNets can run real-time on embedded systems, and obtains SOTA Object Detection, Lane Detection on BDD100K Dataset.
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### Project Structure
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```bash
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HybridNets
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│ backbone.py # Model configuration
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│ hubconf.py # Pytorch Hub entrypoint
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│ hybridnets_test.py # Image inference
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│ hybridnets_test_videos.py # Video inference
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│ train.py # Train script
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│ val.py # Validate script
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│
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├───encoders # https://github.com/qubvel/segmentation_models.pytorch/tree/master/segmentation_models_pytorch/encoders
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│ ...
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│
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├───hybridnets
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│ autoanchor.py # Generate new anchors by k-means
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│ dataset.py # BDD100K dataset
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│ loss.py # Focal, tversky (dice)
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│ model.py # Model blocks
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│
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├───projects
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│ bdd100k.yml # Project configuration
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│
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└───utils
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│ plot.py # Draw bounding box
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│ smp_metrics.py # https://github.com/qubvel/segmentation_models.pytorch/blob/master/segmentation_models_pytorch/metrics/functional.py
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│ utils.py # Various helper functions (preprocess, postprocess, eval...)
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│
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└───sync_batchnorm # https://github.com/vacancy/Synchronized-BatchNorm-PyTorch/tree/master/sync_batchnorm
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...
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```
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## Getting Started [](https://colab.research.google.com/drive/1Uc1ZPoPeh-lAhPQ1CloiVUsOIRAVOGWA?usp=sharing)
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### Installation
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The project was developed with [**Python>=3.7**](https://www.python.org/downloads/) and [**Pytorch>=1.10**](https://pytorch.org/get-started/locally/).
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```bash
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git clone https://github.com/datvuthanh/HybridNets
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cd HybridNets
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pip install -r requirements.txt
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```
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### Demo
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```bash
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# Download end-to-end weights
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mkdir weights
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curl -L -o weights/hybridnets.pth https://github.com/datvuthanh/HybridNets/releases/download/v1.0/hybridnets.pth
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# Image inference
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python hybridnets_test.py -w weights/hybridnets.pth --source demo/image --output demo_result --imshow False --imwrite True
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# Video inference
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python hybridnets_test_videos.py -w weights/hybridnets.pth --source demo/video --output demo_result
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# Result is saved in a new folder called demo_result
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```
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## Usage
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### Data Preparation
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Recommended dataset structure:
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```bash
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HybridNets
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└───datasets
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├───imgs
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│ ├───train
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│ └───val
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├───det_annot
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│ ├───train
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│ └───val
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├───da_seg_annot
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│ ├───train
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│ └───val
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└───ll_seg_annot
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├───train
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└───val
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```
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Update your dataset paths in `projects/your_project_name.yml`.
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For BDD100K: [imgs](https://bdd-data.berkeley.edu/), [det_annot](https://drive.google.com/file/d/19CEnZzgLXNNYh1wCvUlNi8UfiBkxVRH0/view), [da_seg_annot](https://drive.google.com/file/d/1NZM-xqJJYZ3bADgLCdrFOa5Vlen3JlkZ/view), [ll_seg_annot](https://drive.google.com/file/d/1o-XpIvHJq0TVUrwlwiMGzwP1CtFsfQ6t/view)
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### Training
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#### 1) Edit or create a new project configuration, using bdd100k.yml as a template
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```python
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# mean and std of dataset in RGB order
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mean: [0.485, 0.456, 0.406]
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std: [0.229, 0.224, 0.225]
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# bdd100k anchors
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anchors_scales: '[2**0, 2**0.70, 2**1.32]'
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anchors_ratios: '[(0.62, 1.58), (1.0, 1.0), (1.58, 0.62)]'
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# must match your dataset's category_id.
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# category_id is one_indexed,
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# for example, index of 'car' here is 0, while category_id is 1
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obj_list: ['car']
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seg_list: ['road',
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'lane']
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dataset:
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color_rgb: false
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dataroot: path/to/imgs
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labelroot: path/to/det_annot
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laneroot: path/to/ll_seg_annot
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maskroot: path/to/da_seg_annot
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...
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```
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#### 2) Train
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```bash
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python train.py -p bdd100k # your_project_name
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-c 3 # coefficient of effnet backbone, result from paper is 3
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-n 4 # num_workers
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-b 8 # batch_size per gpu
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-w path/to/weight # use 'last' to resume training from previous session
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--freeze_det # freeze detection head, others: --freeze_backbone, --freeze_seg
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--lr 1e-5 # learning rate
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--optim adamw # adamw | sgd
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--num_epochs 200
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```
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Please check `python train.py --help` for every available arguments.
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#### 3) Evaluate
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```bash
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python val.py -p bdd100k -c 3 -w checkpoints/weight.pth
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```
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## Training Tips
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### Anchors :anchor:
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If your dataset is intrinsically different from COCO or BDD100K, or the metrics of detection after training are not as high as expected, you could try enabling autoanchor in `project.yml`:
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```python
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...
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model:
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image_size:
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- 640
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- 384
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need_autoanchor: true # set to true to run autoanchor
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pin_memory: false
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...
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```
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This automatically finds the best combination of anchor scales and anchor ratios for your dataset. Then you can manually edit them `project.yml` and disable autoanchor.
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If you're feeling lucky, maybe mess around with base_anchor_scale in `backbone.py`:
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```python
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class HybridNetsBackbone(nn.Module):
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...
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self.pyramid_levels = [5, 5, 5, 5, 5, 5, 5, 5, 6]
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self.anchor_scale = [1.25,1.25,1.25,1.25,1.25,1.25,1.25,1.25,1.25,]
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self.aspect_ratios = kwargs.get('ratios', [(1.0, 1.0), (1.4, 0.7), (0.7, 1.4)])
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...
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```
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and `model.py`:
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```python
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class Anchors(nn.Module):
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for scale, ratio in itertools.product(self.scales, self.ratios):
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base_anchor_size = self.anchor_scale * stride * scale
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anchor_size_x_2 = base_anchor_size * ratio[0] / 2.0
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anchor_size_y_2 = base_anchor_size * ratio[1] / 2.0
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...
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```
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to get a grasp on how anchor boxes work.
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And because a picture is worth a thousand words, you can visualize your anchor boxes in [Anchor Computation Tool](https://github.com/Cli98/anchor_computation_tool).
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### Training stages
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We experimented with training stages and found that this settings achieved the best results:
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1. `--freeze_seg True` ~ 100 epochs
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2. `--freeze_backbone True --freeze_det True` ~ 50 epochs
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3. Train end-to-end ~ 50 epochs
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The reason being detection head is harder to converge early on, so we basically skipped segmentation head to focus on detection first.
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## Results
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### Traffic Object Detection
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<table>
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<tr><th>Result </th><th>Visualization</th></tr>
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<tr><td>
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| Model | Recall (%) | [email protected] (%) |
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|:------------------:|:------------:|:---------------:|
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| `MultiNet` | 81.3 | 60.2 |
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| `DLT-Net` | 89.4 | 68.4 |
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| `Faster R-CNN` | 77.2 | 55.6 |
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| `YOLOv5s` | 86.8 | 77.2 |
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| `YOLOP` | 89.2 | 76.5 |
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| **`HybridNets`** | **92.8** | **77.3** |
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</td><td>
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<img src="images/det1.jpg" width="50%" /><img src="images/det2.jpg" width="50%" />
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</td></tr> </table>
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<!--
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| Model | Recall (%) | [email protected] (%) |
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|:------------------:|:------------:|:---------------:|
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| `MultiNet` | 81.3 | 60.2 |
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| `DLT-Net` | 89.4 | 68.4 |
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| `Faster R-CNN` | 77.2 | 55.6 |
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| `YOLOv5s` | 86.8 | 77.2 |
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| `YOLOP` | 89.2 | 76.5 |
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| **`HybridNets`** | **92.8** | **77.3** |
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<p align="middle">
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<img src="images/det1.jpg" width="49%" />
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<img src="images/det2.jpg" width="49%" />
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</p>
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-->
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### Drivable Area Segmentation
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<table>
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<tr><th>Result </th><th>Visualization</th></tr>
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<tr><td>
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| Model | Drivable mIoU (%) |
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|:----------------:|:-----------------:|
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| `MultiNet` | 71.6 |
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| `DLT-Net` | 71.3 |
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| `PSPNet` | 89.6 |
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| `YOLOP` | 91.5 |
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| **`HybridNets`** | **90.5** |
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</td><td>
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<img src="images/road1.jpg" width="50%" /><img src="images/road2.jpg" width="50%" />
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</td></tr> </table>
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<!--
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| Model | Drivable mIoU (%) |
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|:----------------:|:-----------------:|
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| `MultiNet` | 71.6 |
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| `DLT-Net` | 71.3 |
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| `PSPNet` | 89.6 |
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| `YOLOP` | 91.5 |
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| **`HybridNets`** | **90.5** |
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<p align="middle">
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<img src="images/road1.jpg" width="49%" />
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<img src="images/road2.jpg" width="49%" />
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</p>
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-->
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### Lane Line Detection
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<table>
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<tr><th>Result </th><th>Visualization</th></tr>
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<tr><td>
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| Model | Accuracy (%) | Lane Line IoU (%) |
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|:----------------:|:------------:|:-----------------:|
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| `Enet` | 34.12 | 14.64 |
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| `SCNN` | 35.79 | 15.84 |
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| `Enet-SAD` | 36.56 | 16.02 |
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| `YOLOP` | 70.5 | 26.2 |
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| **`HybridNets`** | **85.4** | **31.6** |
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</td><td>
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<img src="images/lane1.jpg" width="50%" /><img src="images/lane2.jpg" width="50%" />
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</td></tr> </table>
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<!--
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| Model | Accuracy (%) | Lane Line IoU (%) |
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|:----------------:|:------------:|:-----------------:|
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| `Enet` | 34.12 | 14.64 |
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| `SCNN` | 35.79 | 15.84 |
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| `Enet-SAD` | 36.56 | 16.02 |
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| `YOLOP` | 70.5 | 26.2 |
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| **`HybridNets`** | **85.4** | **31.6** |
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<p align="middle">
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<img src="images/lane1.jpg" width="49%" />
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<img src="images/lane2.jpg" width="49%" />
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</p>
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-->
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<div align="center">
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[Original footage](https://www.youtube.com/watch?v=lx4yA1LEi9c) courtesy of [Hanoi Life](https://www.youtube.com/channel/UChT1Cpf_URepCpsdIqjsDHQ)
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</div>
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## License
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Distributed under the MIT License. See `LICENSE` for more information.
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## Acknowledgements
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Our work would not be complete without the wonderful work of the following authors:
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* [EfficientDet](https://github.com/zylo117/Yet-Another-EfficientDet-Pytorch)
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* [YOLOv5](https://github.com/ultralytics/yolov5)
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* [YOLOP](https://github.com/hustvl/YOLOP)
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* [KMeans Anchors Ratios](https://github.com/mnslarcher/kmeans-anchors-ratios)
|
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* [Anchor Computation Tool](https://github.com/Cli98/anchor_computation_tool)
|
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-
|
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-
## Citation
|
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-
|
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-
If you find our paper and code useful for your research, please consider giving a star :star: and citation :pencil: :
|
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-
|
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-
```BibTeX
|
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@misc{vu2022hybridnets,
|
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title={HybridNets: End-to-End Perception Network},
|
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author={Dat Vu and Bao Ngo and Hung Phan},
|
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year={2022},
|
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eprint={2203.09035},
|
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archivePrefix={arXiv},
|
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-
primaryClass={cs.CV}
|
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-
}
|
393 |
-
```
|
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|
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<!-- MARKDOWN LINKS & IMAGES -->
|
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-
<!-- https://www.markdownguide.org/basic-syntax/#reference-style-links -->
|
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[contributors-shield]: https://img.shields.io/github/contributors/othneildrew/Best-README-Template.svg?style=for-the-badge
|
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-
[contributors-url]: https://github.com/datvuthanh/HybridNets/graphs/contributors
|
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[forks-shield]: https://img.shields.io/github/forks/othneildrew/Best-README-Template.svg?style=for-the-badge
|
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[forks-url]: https://github.com/datvuthanh/HybridNets/network/members
|
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[stars-shield]: https://img.shields.io/github/stars/othneildrew/Best-README-Template.svg?style=for-the-badge
|
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-
[stars-url]: https://github.com/datvuthanh/HybridNets/stargazers
|
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[issues-shield]: https://img.shields.io/github/issues/othneildrew/Best-README-Template.svg?style=for-the-badge
|
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[issues-url]: https://github.com/datvuthanh/HybridNets/issues
|
|
|
1 |
---
|
2 |
+
title: HybridNet_Demo
|
3 |
+
emoji: 💩
|
4 |
+
colorFrom: yellow
|
5 |
+
colorTo: red
|
6 |
+
sdk: gradio
|
7 |
+
sdk_version: 2.8.14
|
8 |
app_file: app.py
|
9 |
pinned: false
|
10 |
+
license: mit
|
11 |
---
|
12 |
|
13 |
+
Check out the configuration reference at https://huggingface.co/docs/hub/spaces#reference
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