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beat-buesser avatar beat-buesser commented on May 23, 2024

Hi @Lodour Thank you for using ART! How does you proposed solution with the same functionality look like?

from adversarial-robustness-toolbox.

Lodour avatar Lodour commented on May 23, 2024

My workaround is passing y_pred to self.loss, but this only handles the default loss function self._get_logits_diff

def _get_logits_diff(self, x: np.ndarray, y: np.ndarray) -> np.ndarray:
y_pred = self.estimator.predict(x, batch_size=self.batch_size)
logit_correct = np.take_along_axis(y_pred, np.expand_dims(np.argmax(y, axis=1), axis=1), axis=1)
logit_highest_incorrect = np.take_along_axis(
y_pred, np.expand_dims(np.argsort(y_pred, axis=1)[:, -2], axis=1), axis=1
)
return (logit_correct - logit_highest_incorrect)[:, 0]

The method would become something like

def _get_logits_diff(self, x: np.ndarray, y: np.ndarray, y_pred: Optional[np.ndarray] = None):
    if y_pred is None:
        y_pred = self.estimator.predict(x, batch_size=self.batch_size)
    ...

I haven't come up with a general solution for custom loss functions.

from adversarial-robustness-toolbox.

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