Unflatten operation test data & models #1190
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@opencv-alalek please update Buildbot. |
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…t-fix-4x Merge pull request #25861 from Abdurrahheem:ash/torch-attention-export-fix-4x Support for Unflatten operation requred by Attention layer - 4.x #25861 ### Pull Request Readiness Checklist All test data and models for PR are located [#1190](opencv/opencv_extra#1190) This PR fixes issue reised when importing batched vanilla `Attention` layer from `PyTorch` via ONNX. Currently batched version of `Attention` layer in PyTorch [has unflatten operation inside](https://github.com/pytorch/pytorch/blob/e3b3431c4203e9eeead48f96d4afd462f0b81de5/torch/nn/functional.py#L5500C17-L5500C31). `unflatten` operation causes issue in `reshape` layer (see the Reshape_2 in the graph below) due to incorrect output of `slice` layer. This PR particularly fixes `slice` and `concat` layers to handle `unflatten` operation. <img width="673" alt="image" src="https://github.com/opencv/opencv/assets/44877829/5b612b31-657a-47f1-83a4-0ac35a950abd"> See details at https://github.com/opencv/opencv/wiki/How_to_contribute#making-a-good-pull-request - [x] I agree to contribute to the project under Apache 2 License. - [x] To the best of my knowledge, the proposed patch is not based on a code under GPL or another license that is incompatible with OpenCV - [x] The PR is proposed to the proper branch - [x] There is a reference to the original bug report and related work - [x] There is accuracy test, performance test and test data in opencv_extra repository, if applicable Patch to opencv_extra has the same branch name. - [x] The feature is well documented and sample code can be built with the project CMake
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This PR creates models and test required by #25861