darkliang
88 lines
4.1 KiB
Markdown
88 lines
4.1 KiB
Markdown
# Advanced Usages
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### Cross-Dataset Evalution
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> You can conduct cross-dataset evalution by just modifying several arguments in your [data_cfg](../config/baseline/baseline.yaml#L1).
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>
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> Take [baseline.yaml](../config/baseline/baseline.yaml) as an example:
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> ```yaml
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> data_cfg:
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> dataset_name: CASIA-B
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> dataset_root: your_path
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> dataset_partition: ./datasets/CASIA-B/CASIA-B_include_005.json
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> num_workers: 1
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> remove_no_gallery: false # Remove probe if no gallery for it
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> test_dataset_name: CASIA-B
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> ```
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> Now, suppose we get the model trained on [CASIA-B](http://www.cbsr.ia.ac.cn/english/Gait%20Databases.asp), and then we want to test it on [OUMVLP](http://www.am.sanken.osaka-u.ac.jp/BiometricDB/GaitMVLP.html).
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>
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> We should alter the `dataset_root`, `dataset_partition` and `test_dataset_name`, just like:
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> ```yaml
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> data_cfg:
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> dataset_name: CASIA-B
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> dataset_root: your_OUMVLP_path
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> dataset_partition: ./datasets/OUMVLP/OUMVLP.json
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> num_workers: 1
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> remove_no_gallery: false # Remove probe if no gallery for it
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> test_dataset_name: OUMVLP
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> ```
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---
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>
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<!-- ### Identification Function
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> Sometime, your test dataset may be neither the popular [CASIA-B](http://www.cbsr.ia.ac.cn/english/Gait%20Databases.asp) nor the largest [OUMVLP](http://www.am.sanken.osaka-u.ac.jp/BiometricDB/GaitMVLP.html). Meanwhile, you need to customize a special identification function to fit your dataset.
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>
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> * If your path structure is similar to [CASIA-B](http://www.cbsr.ia.ac.cn/english/Gait%20Databases.asp) (the 3-flod style: `id-type-view`), we recommand you to -->
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### Data Augmentation
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> In OpenGait, there is a basic transform class almost called by all the models, this is [BaseSilCuttingTransform](../opengait/data/transform.py#L20), which is used to cut the input silhouettes.
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>
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> Accordingly, by referring to this implementation, you can easily customize the data agumentation in just two steps:
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> * *Step1*: Define the transform function or class in [transform.py](../opengait/data/transform.py), and make sure it callable. The style of [torchvision.transforms](https://pytorch.org/vision/stable/_modules/torchvision/transforms/transforms.html) is recommanded, and following shows a demo;
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>> ```python
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>> import torchvision.transforms as T
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>> class demo1():
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>> def __init__(self, args):
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>> pass
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>>
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>> def __call__(self, seqs):
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>> '''
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>> seqs: with dimension of [sequence, height, width]
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>> '''
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>> pass
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>> return seqs
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>>
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>> class demo2():
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>> def __init__(self, args):
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>> pass
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>>
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>> def __call__(self, seqs):
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>> pass
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>> return seqs
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>>
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>> def TransformDemo(base_args, demo1_args, demo2_args):
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>> transform = T.Compose([
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>> BaseSilCuttingTransform(**base_args),
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>> demo1(args=demo1_args),
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>> demo2(args=demo2_args)
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>> ])
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>> return transform
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>> ```
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> * *Step2*: Reset the [`transform`](../config/baseline.yaml#L100) arguments in your config file:
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>> ```yaml
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>> transform:
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>> - type: TransformDemo
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>> base_args: {'img_w': 64}
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>> demo1_args: false
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>> demo2_args: false
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>> ```
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### Visualization
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> To learn how does the model work, sometimes, you need to visualize the intermediate result.
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>
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> For this purpose, we have defined a built-in instantiation of [`torch.utils.tensorboard.SummaryWriter`](https://pytorch.org/docs/stable/tensorboard.html), that is [`self.msg_mgr.writer`](../opengait/utils/msg_manager.py#L24), to make sure you can log the middle information everywhere you want.
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>
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> Demo: if we want to visualize the output feature of [baseline's backbone](../opengait/modeling/models/baseline.py#L27), we could just insert the following codes at [baseline.py#L28](../opengait/modeling/models/baseline.py#L28):
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>> ```python
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>> summary_writer = self.msg_mgr.writer
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>> if torch.distributed.get_rank() == 0 and self.training and self.iteration % 100==0:
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>> summary_writer.add_video('outs', outs.mean(2).unsqueeze(2), self.iteration)
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>> ```
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> Note that this example requires the [`moviepy`](https://github.com/Zulko/moviepy) package, and hence you should run `pip install moviepy` first. |