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gvb

GVBHook

Bases: DANNHook

Implementation of Gradually Vanishing Bridge for Adversarial Domain Adaptation

Source code in pytorch_adapt\hooks\gvb.py 
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class GVBHook(DANNHook):
    """
    Implementation of
    [Gradually Vanishing Bridge for Adversarial Domain Adaptation](https://arxiv.org/abs/2003.13183)
    """

    def __init__(
        self, gradient_reversal_weight=1, pre=None, pre_d=None, pre_g=None, **kwargs
    ):
        # f_hook and d_hook are used inside DomainLossHook
        f_hook = FeaturesForDomainLossHook(use_logits=True)
        d_hook = DBridgeAndLogitsHook()
        apply_to = c_f.filter(f_hook.out_keys, "_logits$")
        gradient_reversal = SoftmaxGradientReversalHook(
            weight=gradient_reversal_weight, apply_to=apply_to
        )
        [pre, pre_d, pre_g] = c_f.many_default([pre, pre_d, pre_g], [[], [], []])
        pre += [FeaturesLogitsAndGBridge()]
        pre_d += [DBridgeLossHook()]
        pre_g += [GBridgeLossHook()]

        super().__init__(
            pre=pre,
            pre_d=pre_d,
            pre_g=pre_g,
            gradient_reversal=gradient_reversal,
            f_hook=f_hook,
            d_hook=d_hook,
            d_hook_allowed="_dlogits$|_dbridge$",
            **kwargs,
        )