[OPS, IMP] New batched_nms implementation #3426
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torchvision/ops/boxes.py
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| iou_threshold: float, | ||
| ) -> Tensor: | ||
| # Based on Detectron2 implementation | ||
| result_mask = scores.new_zeros(scores.size(), dtype=torch.bool) |
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should this be torch.zeros_like(scores, dtype = torch.bool)?
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Looks like a nice boost. :) Does it make sense to check that this fix does not have any negative side-effect on the validation metrics of all pre-trained models? I think we should confirm by re-estimating all the validation stats and by retraining some of the models just before merge. |
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The two implementations are equivalent in terms of results (they both rely on |
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Looks like |
…ng to return vanilla now
NicolasHug
changed the title
Codecov Report
@@ Coverage Diff @@
## master #3426 +/- ##
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+ Coverage 78.70% 78.75% +0.04%
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Files 105 105
Lines 9735 9748 +13
Branches 1563 1565 +2
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+ Hits 7662 7677 +15
+ Misses 1582 1581 -1
+ Partials 491 490 -1
Continue to review full report at Codecov.
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Since the code has changed due to onnx and torchscript compatibility issues, I re-ran the benchmarks.
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| boxes = torch.cat((torch.rand(num_boxes, 2), torch.rand(num_boxes, 2) + 10), dim=1) | ||
| assert max(boxes[:, 0]) < min(boxes[:, 2]) # x1 < x2 | ||
| assert max(boxes[:, 1]) < min(boxes[:, 3]) # y1 < y2 |
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nit: it might be preferable to construct boxes which are always well-formed.
So something like
boxes = torch.rand(num_boxes, 4)
boxes[:, 2:] += boxes[:, :2]is generally better when constructing bounding boxes. It might be good to move this to a helper function btw
Summary: * new batched_nms implem * flake8 * hopefully fix torchscipt tests * Use where instead of nonzero * Use same threshold (4k) for CPU and GPU * Remove use of argsort * use views again * remove print * trying stuff, I don't know what's going on * previous passed onnx checks so the error isn't in _vanilla func. Trying to return vanilla now * add tracing decorators * cleanup * wip * ignore new path with ONNX * use vanilla if tracing...???? * Remove script_if_tracing decorator as it was conflicting with _is_tracing * flake8 * Improve coverage Reviewed By: NicolasHug, cpuhrsch Differential Revision: D26945728 fbshipit-source-id: 118a41e03da2939a726e5bd18f5f77b7c0ce6339 Co-authored-by: Francisco Massa <fvsmassa@gmail.com>
Closes #1311
This PR introduces a new implementation of
batched_nms, which is faster than the current one in some cases (refer to benchmarks in issue)