52 lines
1.9 KiB
Markdown
52 lines
1.9 KiB
Markdown
# Training new models
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This repository also contains our training infrastructure to promote an
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open ecosystem and enable quicker bootstrapping for new research and development.
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Warning: Training is computationally expensive and takes a few
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weeks on our Tesla K40 GPU.
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Because of this, the training code assumes CUDA is installed.
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A rough overview of training is:
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## 1. Create raw image directory.
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Create a directory for your raw images so that images from different
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people are in different subdirectories. The names of the labels or
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images do not matter, and each person can have a different amount of images.
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The images should be formatted as `jpg` or `png` and have
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a lowercase extension.
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```
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$ tree data/mydataset/raw
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person-1
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├── image-1.jpg
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├── image-2.png
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...
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└── image-p.png
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...
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person-m
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├── image-1.png
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├── image-2.jpg
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...
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└── image-q.png
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```
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## 2. Preprocess the raw images
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Change `8` to however many
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separate processes you want to run:
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`for N in {1..8}; do ./util/align-dlib.py <path-to-raw-data> align affine <path-to-aligned-data> --size 96 &; done`.
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Prune out directories with less than N (I use 10) images
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per class with `./util/prune-dataset.py <path-to-aligned-data> --numImagesThreshold <N>` and
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then split the dataset into `train` and `val` subdirectories
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with `./util/create-train-val-split.py <path-to-aligned-data> <validation-ratio>`.
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## 3. Train the model
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Run [training/main.lua](https://github.com/cmusatyalab/openface/blob/master/training/main.lua) to start training the model.
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Edit the dataset options in [training/opts.lua](https://github.com/cmusatyalab/openface/blob/master/training/opts.lua) or
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pass them as command-line parameters.
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This will output the loss and in-progress models to `training/work`.
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## 4. Analyze training
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Visualize the loss with [training/plot-loss.py](https://github.com/cmusatyalab/openface/blob/master/training/plot-loss.py).
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