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Fix ActivationDefense and SpectralSignatures expected flattened bug #2327

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merged 5 commits into from
Dec 20, 2023
Merged

Fix ActivationDefense and SpectralSignatures expected flattened bug #2327

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123af2c
flatten activations for poisoning defenses
f4str Nov 14, 2023
4db7626
remove huggingface estimator activation hack
f4str Nov 14, 2023
b9f5a4d
Merge branch 'dev_1.17.0' into activation-defense-bug
beat-buesser Nov 30, 2023
d345786
Revert "remove huggingface estimator activation hack"
f4str Dec 8, 2023
fc7cbcb
Merge branch 'dev_1.17.0' into activation-defense-bug
beat-buesser Dec 20, 2023
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4 changes: 3 additions & 1 deletion art/defences/detector/poison/activation_defence.py
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Original file line number Diff line number Diff line change
Expand Up @@ -695,7 +695,9 @@ def _get_activations(self, x_train: Optional[np.ndarray] = None) -> np.ndarray:

# wrong way to get activations activations = self.classifier.predict(self.x_train)
if isinstance(activations, np.ndarray):
nodes_last_layer = np.shape(activations)[1]
# flatten activations across batch
activations = np.reshape(activations, (activations.shape[0], -1))
nodes_last_layer = activations.shape[1]
else:
raise ValueError("activations is None or tensor.")

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2 changes: 2 additions & 0 deletions art/defences/detector/poison/spectral_signature_defense.py
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Expand Up @@ -121,6 +121,8 @@ def detect_poison(self, **kwargs) -> Tuple[dict, List[int]]:
raise ValueError("Wrong type detected.")

if features_x_poisoned is not None:
# flatten activations across batch
features_x_poisoned = np.reshape(features_x_poisoned, (features_x_poisoned.shape[0], -1))
features_split = segment_by_class(features_x_poisoned, self.y_train, self.classifier.nb_classes)
else:
raise ValueError("Activation are `None`.")
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