> > - tuple(frame_path(str), out_path(str)): frame_path is the save path of each frame of the video after super resolution, and out_path is the save path of the video after super resolution.
> Build the instance of RealSR. EDVR is a model designed for video super resolution. For more details, see the paper, EDVR: Video Restoration with Enhanced Deformable Convolutional Networks (https://arxiv.org/abs/1905.02716). The interface imposes 2x super resolution on the input video. The recommended video format is mp4.
> Build the instance of PPMSVSR. PPMSVSR is a multi-stage VSR deep architecture. For more details, see the paper, PP-MSVSR: Multi-Stage Video Super-Resolution (https://arxiv.org/pdf/2112.02828.pdf). The interface imposes 4x super resolution on the input video. The recommended video format is mp4.
>
> *Note: The interface is only available in static graph, add the following codes to enable static graph before using it：
> **Parameter**
>
> ```
> import paddle
> paddle.enable_static() #enable static graph
> paddle.disable_static() #disable static graph
> from ppgan.apps import PPMSVSRPredictor
> sr = PPMSVSRPredictor()
> # test a video file
> sr.run("docs/imgs/test.mp4")
> ```
> **参数**
>
> > - output (str): path of the output image, default: output. Note that the path should be set as output/EDVR.
> > - weight_path (str): path of the model, default: None，pre-trained integral model will then be automatically downloaded.
> > - num_frames (int): the number of input frames of the PPMSVSR model, the default value: 10. Note that the larger the num_frames, the better the effect of the video after super resolution.
```python
run(video_path)
```
> The execution interface after building the instance.
> **Parameter**
>
> > - video_path (str): path of the video files.
>
> **Return Value**
>
> > - tuple(str, str): the former is the save path of each frame of the video after super resolution, the latter is the save path of the video after super resolution.
> Build the instance of PPMSVSRLarge. PPMSVSRLarge is a Large PPMSVSR model. For more details, see the paper, PP-MSVSR: Multi-Stage Video Super-Resolution (https://arxiv.org/pdf/2112.02828.pdf). The interface imposes 4x super resolution on the input video. The recommended video format is mp4.
>
> **Parameter**
>
> ```
> from ppgan.apps import PPMSVSRLargePredictor
> sr = PPMSVSRLargePredictor()
> # test a video file
> sr.run("docs/imgs/test.mp4")
> ```
> **参数**
>
> > - output (str): path of the output image, default: output. Note that the path should be set as output/EDVR.
> > - weight_path (str): path of the model, default: None，pre-trained integral model will then be automatically downloaded.
> > - num_frames (int): the number of input frames of the PPMSVSR model, the default value: 10. Note that the larger the num_frames, the better the effect of the video after super resolution.
```python
run(video_path)
```
> The execution interface after building the instance.
> **Parameter**
>
> > - video_path (str): path of the video files.
>
> **Return Value**
>
> > - tuple(str, str): the former is the save path of each frame of the video after super resolution, the latter is the save path of the video after super resolution.
> Build the instance of EDVR. EDVR is a model designed for video super resolution. For more details, see the paper, EDVR: Video Restoration with Enhanced Deformable Convolutional Networks (https://arxiv.org/abs/1905.02716). The interface imposes 4x super resolution on the input video. The recommended video format is mp4.
>
> **Parameter**
>
...
...
@@ -247,6 +314,111 @@ run(video_path)
> > - tuple(str, str): the former is the save path of each frame of the video after super resolution, the latter is the save path of the video after super resolution.
> Build the instance of BasicVSR. BasicVSR is a model designed for video super resolution. For more details, see the paper, BasicVSR: The Search for Essential Components in Video Super-Resolution and Beyond (https://arxiv.org/pdf/2012.02181.pdf). The interface imposes 4x super resolution on the input video. The recommended video format is mp4.
>
> **Parameter**
>
> ```
> from ppgan.apps import BasicVSRPredictor
> sr = BasicVSRPredictor()
> # test a video file
> sr.run("docs/imgs/test.mp4")
> ```
> **参数**
>
> > - output (str): path of the output image, default: output. Note that the path should be set as output/EDVR.
> > - weight_path (str): path of the model, default: None，pre-trained integral model will then be automatically downloaded.
> > - num_frames (int): the number of input frames of the PPMSVSR model, the default value: 10. Note that the larger the num_frames, the better the effect of the video after super resolution.
```python
run(video_path)
```
> The execution interface after building the instance.
> **Parameter**
>
> > - video_path (str): path of the video files.
>
> **Return Value**
>
> > - tuple(str, str): the former is the save path of each frame of the video after super resolution, the latter is the save path of the video after super resolution.
> Build the instance of IconVSR. IconVSR is a VSR model expanded by BasicVSR. For more details, see the paper, BasicVSR: The Search for Essential Components in Video Super-Resolution and Beyond (https://arxiv.org/pdf/2012.02181.pdf). The interface imposes 4x super resolution on the input video. The recommended video format is mp4.
>
> **Parameter**
>
> ```
> from ppgan.apps import IconVSRPredictor
> sr = IconVSRPredictor()
> # test a video file
> sr.run("docs/imgs/test.mp4")
> ```
> **参数**
>
> > - output (str): path of the output image, default: output. Note that the path should be set as output/EDVR.
> > - weight_path (str): path of the model, default: None，pre-trained integral model will then be automatically downloaded.
> > - num_frames (int): the number of input frames of the PPMSVSR model, the default value: 10. Note that the larger the num_frames, the better the effect of the video after super resolution.
```python
run(video_path)
```
> The execution interface after building the instance.
> **Parameter**
>
> > - video_path (str): path of the video files.
>
> **Return Value**
>
> > - tuple(str, str): the former is the save path of each frame of the video after super resolution, the latter is the save path of the video after super resolution.
> Build the instance of BasiVSRPlusPlus. BasiVSRPlusPlus is a model designed for video super resolution. For more details, see the paper, BasicVSR++: Improving Video Super-Resolution with Enhanced Propagation and Alignment (https://arxiv.org/pdf/2104.13371v1.pdf). The interface imposes 4x super resolution on the input video. The recommended video format is mp4.
>
> **Parameter**
>
> ```
> from ppgan.apps import BasiVSRPlusPlusPredictor
> sr = BasiVSRPlusPlusPredictor()
> # test a video file
> sr.run("docs/imgs/test.mp4")
> ```
> **参数**
>
> > - output (str): path of the output image, default: output. Note that the path should be set as output/EDVR.
> > - weight_path (str): path of the model, default: None，pre-trained integral model will then be automatically downloaded.
> > - num_frames (int): the number of input frames of the PPMSVSR model, the default value: 10. Note that the larger the num_frames, the better the effect of the video after super resolution.
```python
run(video_path)
```
> The execution interface after building the instance.
> **Parameter**
>
> > - video_path (str): path of the video files.
>
> **Return Value**
>
> > - tuple(str, str): the former is the save path of each frame of the video after super resolution, the latter is the save path of the video after super resolution.
[PP-MSVSR](https://arxiv.org/pdf/2112.02828.pdf) is a multi-stage VSR deep architecture, with local fusion module, auxiliary loss and refined align module to refine the enhanced result progressively. Specifically, in order to strengthen the fusion of features across frames in feature propagation, a local fusion module is designed in stage-1 to perform local feature fusion before feature propagation. Moreover, an auxiliary loss in stage-2 is introduced to make the features obtained by the propagation module reserve more correlated information connected to the HR space, and introduced a refined align module in stage-3 to make full use of the feature information of the previous stage. Extensive experiments substantiate that PP-MSVSR achieves a promising performance of Vid4 datasets, which PSNR metric can achieve 28.13 with only 1.45M parameters.
Additionally, [PP-MSVSR](https://arxiv.org/pdf/2112.02828.pdf) provides two different models with 1.45M and 7.4M parameters in order to satisfy different requirements.
### EDVR
[EDVR](https://arxiv.org/pdf/1905.02716.pdf) wins the champions and outperforms the second place by a large margin in all four tracks in the NTIRE19 video restoration and enhancement challenges. The main difficulties of video super-resolution from two aspects: (1) how to align multiple frames given large motions, and (2) how to effectively fuse different frames with diverse motion and blur. First, to handle large motions, EDVR devise a Pyramid, Cascading and Deformable (PCD) alignment module, in which frame alignment is done at the feature level using deformable convolutions in a coarse-to-fine manner. Second, EDVR propose a Temporal and Spatial Attention (TSA) fusion module, in which attention is applied both temporally and spatially, so as to emphasize important features for subsequent restoration.
...
...
@@ -203,7 +203,7 @@ VSR quantitative comparis on the Vimeo90K, Vid4, UDM10
}
```
- 4. [PP-MSVSR: Multi-Stage Video Super-Resolution]()
- 4. [PP-MSVSR: Multi-Stage Video Super-Resolution](https://arxiv.org/pdf/2112.02828.pdf)
