28 lines
1020 B
Python
28 lines
1020 B
Python
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class ProtoTorchMixin(object):
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"""All mixins are ProtoTorchMixins."""
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pass
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class NonGradientMixin(ProtoTorchMixin):
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"""Mixin for custom non-gradient optimization."""
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def __init__(self, *args, **kwargs):
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super().__init__(*args, **kwargs)
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self.automatic_optimization = False
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def training_step(self, train_batch, batch_idx, optimizer_idx=None):
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raise NotImplementedError
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class ImagePrototypesMixin(ProtoTorchMixin):
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"""Mixin for models with image prototypes."""
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def on_train_batch_end(self, outputs, batch, batch_idx, dataloader_idx):
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"""Constrain the components to the range [0, 1] by clamping after updates."""
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self.proto_layer.components.data.clamp_(0.0, 1.0)
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def get_prototype_grid(self, num_columns=2, return_channels_last=True):
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from torchvision.utils import make_grid
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grid = make_grid(self.components, nrow=num_columns)
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if return_channels_last:
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grid = grid.permute((1, 2, 0))
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return grid.cpu()
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