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| author | Jordan Gong <jordan.gong@protonmail.com> | 2021-03-01 14:04:02 +0800 |
|---|---|---|
| committer | Jordan Gong <jordan.gong@protonmail.com> | 2021-03-01 14:04:02 +0800 |
| commit | 7318a09451852e3f7d5f68180964f03bd0b0f616 (patch) | |
| tree | 6c159898652052894d2526c034c86123af28f8f2 | |
| parent | db0564967d8cfc03b2d3fe4f7d10eff0867e1771 (diff) | |
Change flat distance calculation method
| -rw-r--r-- | utils/triplet_loss.py | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/utils/triplet_loss.py b/utils/triplet_loss.py index 6822cf6..e05b69d 100644 --- a/utils/triplet_loss.py +++ b/utils/triplet_loss.py @@ -20,8 +20,8 @@ class BatchTripletLoss(nn.Module): def forward(self, x, y): p, n, c = x.size() dist = self._batch_distance(x) - flat_dist = dist.tril(-1) - flat_dist = flat_dist[flat_dist != 0].view(p, -1) + flat_dist_mask = torch.tril_indices(n, n, offset=-1, device=dist.device) + flat_dist = dist[:, flat_dist_mask[0], flat_dist_mask[1]] if self.is_hard: positive_negative_dist = self._hard_distance(dist, y, p, n) @@ -102,6 +102,8 @@ class JointBatchTripletLoss(BatchTripletLoss): def forward(self, x, y): p, n, c = x.size() dist = self._batch_distance(x) + flat_dist_mask = torch.tril_indices(n, n, offset=-1, device=dist.device) + flat_dist = dist[:, flat_dist_mask[0], flat_dist_mask[1]] if self.is_hard: positive_negative_dist = self._hard_distance(dist, y, p, n) @@ -122,4 +124,4 @@ class JointBatchTripletLoss(BatchTripletLoss): else: # is_sum loss_metric = losses.sum(1) - return loss_metric, dist, non_zero_counts + return loss_metric, flat_dist, non_zero_counts |