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# Continuous Surface Embeddings for Dense Pose Estimation for Humans and Animals
## <a name="Overview"></a> Overview
<div align="center">
<img src="https://dl.fbaipublicfiles.com/densepose/web/densepose_cse_teaser.png" width="700px" />
</div>
The pipeline uses [Faster R-CNN](https://arxiv.org/abs/1506.01497)
with [Feature Pyramid Network](https://arxiv.org/abs/1612.03144) meta architecture
outlined in Figure 1. For each detected object, the model predicts
its coarse segmentation `S` (2 channels: foreground / background)
and the embedding `E` (16 channels). At the same time, the embedder produces vertex
embeddings `Ê` for the corresponding mesh. Universal positional embeddings `E`
and vertex embeddings `Ê` are matched to derive for each pixel its continuous
surface embedding.
<div align="center">
<img src="https://dl.fbaipublicfiles.com/densepose/web/densepose_pipeline_cse.png" width="700px" />
</div>
<p class="image-caption"><b>Figure 1.</b> DensePose continuous surface embeddings architecture based on Faster R-CNN with Feature Pyramid Network (FPN).</p>
### Datasets
For more details on datasets used for training and validation of
continuous surface embeddings models,
please refer to the [DensePose Datasets](DENSEPOSE_DATASETS.md) page.
## <a name="ModelZoo"></a> Model Zoo and Baselines
### Human CSE Models
Continuous surface embeddings models for humans trained using the protocols from [Neverova et al, 2020](https://arxiv.org/abs/2011.12438).
Models trained with hard assignment loss ℒ:
<table><tbody>
<!-- START TABLE -->
<!-- TABLE HEADER -->
<th valign="bottom">Name</th>
<th valign="bottom">lr<br/>sched</th>
<th valign="bottom">train<br/>time<br/>(s/iter)</th>
<th valign="bottom">inference<br/>time<br/>(s/im)</th>
<th valign="bottom">train<br/>mem<br/>(GB)</th>
<th valign="bottom">box<br/>AP</th>
<th valign="bottom">segm<br/>AP</th>
<th valign="bottom">dp. AP<br/>GPS</th>
<th valign="bottom">dp. AP<br/>GPSm</th>
<th valign="bottom">model id</th>
<th valign="bottom">download</th>
<!-- TABLE BODY -->
<!-- ROW: densepose_rcnn_R_50_FPN_s1x -->
<tr><td align="left"><a href="../configs/cse/densepose_rcnn_R_50_FPN_s1x.yaml">R_50_FPN_s1x</a></td>
<td align="center">s1x</td>
<td align="center">0.349</td>
<td align="center">0.060</td>
<td align="center">6.3</td>
<td align="center">61.1</td>
<td align="center">67.1</td>
<td align="center">64.4</td>
<td align="center">65.7</td>
<td align="center">251155172</td>
<td align="center"><a href="https://dl.fbaipublicfiles.com/densepose/cse/densepose_rcnn_R_50_FPN_s1x/251155172/model_final_c4ea5f.pkl">model</a> | <a href="https://dl.fbaipublicfiles.com/densepose/cse/densepose_rcnn_R_50_FPN_s1x/251155172/metrics.json">metrics</a></td>
</tr>
<!-- ROW: densepose_rcnn_R_101_FPN_s1x -->
<tr><td align="left"><a href="../configs/cse/densepose_rcnn_R_101_FPN_s1x.yaml">R_101_FPN_s1x</a></td>
<td align="center">s1x</td>
<td align="center">0.461</td>
<td align="center">0.071</td>
<td align="center">7.4</td>
<td align="center">62.3</td>
<td align="center">67.2</td>
<td align="center">64.7</td>
<td align="center">65.8</td>
<td align="center">251155500</td>
<td align="center"><a href="https://dl.fbaipublicfiles.com/densepose/cse/densepose_rcnn_R_101_FPN_s1x/251155500/model_final_5c995f.pkl">model</a> | <a href="https://dl.fbaipublicfiles.com/densepose/cse/densepose_rcnn_R_101_FPN_s1x/251155500/metrics.json">metrics</a></td>
</tr>
<!-- ROW: densepose_rcnn_R_50_FPN_DL_s1x -->
<tr><td align="left"><a href="../configs/cse/densepose_rcnn_R_50_FPN_DL_s1x.yaml">R_50_FPN_DL_s1x</a></td>
<td align="center">s1x</td>
<td align="center">0.399</td>
<td align="center">0.061</td>
<td align="center">7.0</td>
<td align="center">60.8</td>
<td align="center">67.8</td>
<td align="center">65.5</td>
<td align="center">66.4</td>
<td align="center">251156349</td>
<td align="center"><a href="https://dl.fbaipublicfiles.com/densepose/cse/densepose_rcnn_R_50_FPN_DL_s1x/251156349/model_final_e96218.pkl">model</a> | <a href="https://dl.fbaipublicfiles.com/densepose/cse/densepose_rcnn_R_50_FPN_DL_s1x/251156349/metrics.json">metrics</a></td>
</tr>
<!-- ROW: densepose_rcnn_R_101_FPN_DL_s1x -->
<tr><td align="left"><a href="../configs/cse/densepose_rcnn_R_101_FPN_DL_s1x.yaml">R_101_FPN_DL_s1x</a></td>
<td align="center">s1x</td>
<td align="center">0.504</td>
<td align="center">0.074</td>
<td align="center">8.3</td>
<td align="center">61.5</td>
<td align="center">68.0</td>
<td align="center">65.6</td>
<td align="center">66.6</td>
<td align="center">251156606</td>
<td align="center"><a href="https://dl.fbaipublicfiles.com/densepose/cse/densepose_rcnn_R_101_FPN_DL_s1x/251156606/model_final_b236ce.pkl">model</a> | <a href="https://dl.fbaipublicfiles.com/densepose/cse/densepose_rcnn_R_101_FPN_DL_s1x/251156606/metrics.json">metrics</a></td>
</tr>
</tbody></table>
Models trained with soft assignment loss ℒ<sub>σ</sub>:
<table><tbody>
<!-- START TABLE -->
<!-- TABLE HEADER -->
<th valign="bottom">Name</th>
<th valign="bottom">lr<br/>sched</th>
<th valign="bottom">train<br/>time<br/>(s/iter)</th>
<th valign="bottom">inference<br/>time<br/>(s/im)</th>
<th valign="bottom">train<br/>mem<br/>(GB)</th>
<th valign="bottom">box<br/>AP</th>
<th valign="bottom">segm<br/>AP</th>
<th valign="bottom">dp. AP<br/>GPS</th>
<th valign="bottom">dp. AP<br/>GPSm</th>
<th valign="bottom">model id</th>
<th valign="bottom">download</th>
<!-- TABLE BODY -->
<!-- ROW: densepose_rcnn_R_50_FPN_soft_s1x -->
<tr><td align="left"><a href="../configs/cse/densepose_rcnn_R_50_FPN_soft_s1x.yaml">R_50_FPN_soft_s1x</a></td>
<td align="center">s1x</td>
<td align="center">0.357</td>
<td align="center">0.057</td>
<td align="center">9.7</td>
<td align="center">61.3</td>
<td align="center">66.9</td>
<td align="center">64.3</td>
<td align="center">65.4</td>
<td align="center">250533982</td>
<td align="center"><a href="https://dl.fbaipublicfiles.com/densepose/cse/densepose_rcnn_R_50_FPN_soft_s1x/250533982/model_final_2c4512.pkl">model</a> | <a href="https://dl.fbaipublicfiles.com/densepose/cse/densepose_rcnn_R_50_FPN_soft_s1x/250533982/metrics.json">metrics</a></td>
</tr>
<!-- ROW: densepose_rcnn_R_101_FPN_soft_s1x -->
<tr><td align="left"><a href="../configs/cse/densepose_rcnn_R_101_FPN_soft_s1x.yaml">R_101_FPN_soft_s1x</a></td>
<td align="center">s1x</td>
<td align="center">0.464</td>
<td align="center">0.071</td>
<td align="center">10.5</td>
<td align="center">62.1</td>
<td align="center">67.3</td>
<td align="center">64.5</td>
<td align="center">66.0</td>
<td align="center">250712522</td>
<td align="center"><a href="https://dl.fbaipublicfiles.com/densepose/cse/densepose_rcnn_R_101_FPN_soft_s1x/250712522/model_final_4637da.pkl">model</a> | <a href="https://dl.fbaipublicfiles.com/densepose/cse/densepose_rcnn_R_101_FPN_soft_s1x/250712522/metrics.json">metrics</a></td>
</tr>
<!-- ROW: densepose_rcnn_R_50_FPN_DL_soft_s1x -->
<tr><td align="left"><a href="../configs/cse/densepose_rcnn_R_50_FPN_DL_soft_s1x.yaml">R_50_FPN_DL_soft_s1x</a></td>
<td align="center">s1x</td>
<td align="center">0.427</td>
<td align="center">0.062</td>
<td align="center">11.3</td>
<td align="center">60.8</td>
<td align="center">68.0</td>
<td align="center">66.1</td>
<td align="center">66.7</td>
<td align="center">250713703</td>
<td align="center"><a href="https://dl.fbaipublicfiles.com/densepose/cse/densepose_rcnn_R_50_FPN_DL_soft_s1x/250713703/model_final_9199f5.pkl">model</a> | <a href="https://dl.fbaipublicfiles.com/densepose/cse/densepose_rcnn_R_50_FPN_DL_soft_s1x/250713703/metrics.json">metrics</a></td>
</tr>
<!-- ROW: densepose_rcnn_R_101_FPN_DL_soft_s1x -->
<tr><td align="left"><a href="../configs/cse/densepose_rcnn_R_101_FPN_DL_soft_s1x.yaml">R_101_FPN_DL_soft_s1x</a></td>
<td align="center">s1x</td>
<td align="center">0.483</td>
<td align="center">0.071</td>
<td align="center">12.2</td>
<td align="center">61.5</td>
<td align="center">68.2</td>
<td align="center">66.2</td>
<td align="center">67.1</td>
<td align="center">250713061</td>
<td align="center"><a href="https://dl.fbaipublicfiles.com/densepose/cse/densepose_rcnn_R_101_FPN_DL_soft_s1x/250713061/model_final_1d3314.pkl">model</a> | <a href="https://dl.fbaipublicfiles.com/densepose/cse/densepose_rcnn_R_101_FPN_DL_soft_s1x/250713061/metrics.json">metrics</a></td>
</tr>
</tbody></table>
### Animal CSE Models
Models obtained by finetuning human CSE models on animals data from `ds1_train`
(see the [DensePose LVIS](DENSEPOSE_DATASETS.md#continuous-surface-embeddings-annotations-3)
section for more details on the datasets) with soft assignment loss ℒ<sub>σ</sub>:
<table><tbody>
<!-- START TABLE -->
<!-- TABLE HEADER -->
<th valign="bottom">Name</th>
<th valign="bottom">lr<br/>sched</th>
<th valign="bottom">train<br/>time<br/>(s/iter)</th>
<th valign="bottom">inference<br/>time<br/>(s/im)</th>
<th valign="bottom">train<br/>mem<br/>(GB)</th>
<th valign="bottom">box<br/>AP</th>
<th valign="bottom">segm<br/>AP</th>
<th valign="bottom">dp. AP<br/>GPS</th>
<th valign="bottom">dp. AP<br/>GPSm</th>
<th valign="bottom">model id</th>
<th valign="bottom">download</th>
<!-- TABLE BODY -->
<!-- ROW: densepose_rcnn_R_50_FPN_soft_chimps_finetune_4k -->
<tr><td align="left"><a href="../configs/cse/densepose_rcnn_R_50_FPN_soft_chimps_finetune_4k.yaml">R_50_FPN_soft_chimps_finetune_4k</a></td>
<td align="center">4K</td>
<td align="center">0.569</td>
<td align="center">0.051</td>
<td align="center">4.7</td>
<td align="center">62.0</td>
<td align="center">59.0</td>
<td align="center">32.2</td>
<td align="center">39.6</td>
<td align="center">253146869</td>
<td align="center"><a href="https://dl.fbaipublicfiles.com/densepose/cse/densepose_rcnn_R_50_FPN_soft_chimps_finetune_4k/253146869/model_final_52f649.pkl">model</a> | <a href="https://dl.fbaipublicfiles.com/densepose/cse/densepose_rcnn_R_50_FPN_soft_chimps_finetune_4k/253146869/metrics.json">metrics</a></td>
</tr>
<!-- ROW: densepose_rcnn_R_50_FPN_soft_animals_finetune_4k -->
<tr><td align="left"><a href="../configs/cse/densepose_rcnn_R_50_FPN_soft_animals_finetune_4k.yaml">R_50_FPN_soft_animals_finetune_4k</a></td>
<td align="center">4K</td>
<td align="center">0.381</td>
<td align="center">0.061</td>
<td align="center">7.3</td>
<td align="center">44.9</td>
<td align="center">55.5</td>
<td align="center">21.3</td>
<td align="center">28.8</td>
<td align="center">253145793</td>
<td align="center"><a href="https://dl.fbaipublicfiles.com/densepose/cse/densepose_rcnn_R_50_FPN_soft_animals_finetune_4k/253145793/model_final_8f8ba2.pkl">model</a> | <a href="https://dl.fbaipublicfiles.com/densepose/cse/densepose_rcnn_R_50_FPN_soft_animals_finetune_4k/253145793/metrics.json">metrics</a></td>
</tr>
<!-- ROW: densepose_rcnn_R_50_FPN_soft_animals_CA_finetune_4k -->
<tr><td align="left"><a href="../configs/cse/densepose_rcnn_R_50_FPN_soft_animals_CA_finetune_4k.yaml">R_50_FPN_soft_animals_CA_finetune_4k</a></td>
<td align="center">4K</td>
<td align="center">0.412</td>
<td align="center">0.059</td>
<td align="center">7.1</td>
<td align="center">53.4</td>
<td align="center">59.5</td>
<td align="center">25.4</td>
<td align="center">33.4</td>
<td align="center">253498611</td>
<td align="center"><a href="https://dl.fbaipublicfiles.com/densepose/cse/densepose_rcnn_R_50_FPN_soft_animals_CA_finetune_4k/253498611/model_final_6d69b7.pkl">model</a> | <a href="https://dl.fbaipublicfiles.com/densepose/cse/densepose_rcnn_R_50_FPN_soft_animals_CA_finetune_4k/253498611/metrics.json">metrics</a></td>
</tr>
</tbody></table>
Acronyms:
`CA`: class agnostic training, where all annotated instances are mapped into a single category
Models obtained by finetuning human CSE models on animals data from `ds2_train` dataset
with soft assignment loss ℒ<sub>σ</sub> and, for some schedules, cycle losses.
Please refer to [DensePose LVIS](DENSEPOSE_DATASETS.md#continuous-surface-embeddings-annotations-3)
section for details on the dataset and to [Neverova et al, 2021]() for details on cycle losses.
<table><tbody>
<!-- START TABLE -->
<!-- TABLE HEADER -->
<th valign="bottom">Name</th>
<th valign="bottom">lr<br/>sched</th>
<th valign="bottom">train<br/>time<br/>(s/iter)</th>
<th valign="bottom">inference<br/>time<br/>(s/im)</th>
<th valign="bottom">train<br/>mem<br/>(GB)</th>
<th valign="bottom">box<br/>AP</th>
<th valign="bottom">segm<br/>AP</th>
<th valign="bottom">dp. AP<br/>GPS</th>
<th valign="bottom">dp. AP<br/>GPSm</th>
<th valign="bottom">GErr</th>
<th valign="bottom">GPS</th>
<th valign="bottom">model id</th>
<th valign="bottom">download</th>
<!-- TABLE BODY -->
<!-- ROW: densepose_rcnn_R_50_FPN_soft_animals_I0_finetune_16k -->
<tr><td align="left"><a href="../configs/cse/densepose_rcnn_R_50_FPN_soft_animals_I0_finetune_16k.yaml">R_50_FPN_soft_animals_I0_finetune_16k</a></td>
<td align="center">16k</td>
<td align="center">0.386</td>
<td align="center">0.058</td>
<td align="center">8.4</td>
<td align="center">54.2</td>
<td align="center">67.0</td>
<td align="center">29.0</td>
<td align="center">38.6</td>
<td align="center">13.2</td>
<td align="center">85.4</td>
<td align="center">270727112</td>
<td align="center"><a href="https://dl.fbaipublicfiles.com/densepose/cse/densepose_rcnn_R_50_FPN_soft_animals_I0_finetune_16k/270727112/model_final_421d28.pkl">model</a> | <a href="https://dl.fbaipublicfiles.com/densepose/cse/densepose_rcnn_R_50_FPN_soft_animals_I0_finetune_16k/270727112/metrics.json">metrics</a></td>
</tr>
<!-- ROW: densepose_rcnn_R_50_FPN_soft_animals_I0_finetune_m2m_16k -->
<tr><td align="left"><a href="../configs/cse/densepose_rcnn_R_50_FPN_soft_animals_I0_finetune_m2m_16k.yaml">R_50_FPN_soft_animals_I0_finetune_m2m_16k</a></td>
<td align="center">16k</td>
<td align="center">0.508</td>
<td align="center">0.056</td>
<td align="center">12.2</td>
<td align="center">54.1</td>
<td align="center">67.3</td>
<td align="center">28.6</td>
<td align="center">38.4</td>
<td align="center">12.5</td>
<td align="center">87.6</td>
<td align="center">270982215</td>
<td align="center"><a href="https://dl.fbaipublicfiles.com/densepose/cse/densepose_rcnn_R_50_FPN_soft_animals_I0_finetune_m2m_16k/270982215/model_final_6fe5f4.pkl">model</a> | <a href="https://dl.fbaipublicfiles.com/densepose/cse/densepose_rcnn_R_50_FPN_soft_animals_I0_finetune_m2m_16k/270982215/metrics.json">metrics</a></td>
</tr>
<!-- ROW: densepose_rcnn_R_50_FPN_soft_animals_I0_finetune_i2m_16k -->
<tr><td align="left"><a href="../configs/cse/densepose_rcnn_R_50_FPN_soft_animals_I0_finetune_i2m_16k.yaml">R_50_FPN_soft_animals_I0_finetune_i2m_16k</a></td>
<td align="center">16k</td>
<td align="center">0.483</td>
<td align="center">0.056</td>
<td align="center">9.7</td>
<td align="center">54.0</td>
<td align="center">66.6</td>
<td align="center">28.9</td>
<td align="center">38.3</td>
<td align="center">11.0</td>
<td align="center">88.9</td>
<td align="center">270727461</td>
<td align="center"><a href="https://dl.fbaipublicfiles.com/densepose/cse/densepose_rcnn_R_50_FPN_soft_animals_I0_finetune_i2m_16k/270727461/model_final_8c9d99.pkl">model</a> | <a href="https://dl.fbaipublicfiles.com/densepose/cse/densepose_rcnn_R_50_FPN_soft_animals_I0_finetune_i2m_16k/270727461/metrics.json">metrics</a></td>
</tr>
</tbody></table>
## <a name="References"></a> References
If you use DensePose methods based on continuous surface embeddings, please take the
references from the following BibTeX entries:
Continuous surface embeddings:
```
@InProceedings{Neverova2020ContinuousSurfaceEmbeddings,
title = {Continuous Surface Embeddings},
author = {Neverova, Natalia and Novotny, David and Khalidov, Vasil and Szafraniec, Marc and Labatut, Patrick and Vedaldi, Andrea},
journal = {Advances in Neural Information Processing Systems},
year = {2020},
}
```
Cycle Losses:
```
@InProceedings{Neverova2021UniversalCanonicalMaps,
title = {Discovering Relationships between Object Categories via Universal Canonical Maps},
author = {Neverova, Natalia and Sanakoyeu, Artsiom and Novotny, David and Labatut, Patrick and Vedaldi, Andrea},
journal = {The IEEE Conference on Computer Vision and Pattern Recognition (CVPR)},
year = {2021},
}
```
|