opencv/modules/dnn/misc
alexlyulkov a40ceff215
Merge pull request #26330 from alexlyulkov:al/new-engine-tflite-parser2
Modified TFLite parser for the new dnn engine #26330

The new dnn graph is creating just by defining input and output names of each layer.
Some TFLite layers has fused activation, which doesn't have layer name and input and output names. Also some layers require additional preprocessing layers (e.g. NHWC -> NCHW). All these layers should be added to the graph with some unique layer and input and output names. 

I solve this problem by adding additionalPreLayer and additionalPostLayer layers.

If a layer has a fused activation, I add additionalPostLayer and change input and output names this way:
**original**: conv_relu(conv123, conv123_input, conv123_output)
**new**: conv(conv123, conv123_input, conv123_output_additional_post_layer) + relu(conv123_relu,  conv1_output_additional_post_layer, conv123_output)

If a layer has additional preprocessing layer, I change input and output names this way:
**original**: permute_reshape(reshape345, reshape345_input, reshape345_output)
**new**: permute(reshape345_permute, reshape345_input, reshape345_input_additional_pre_layer) + reshape(reshape345, reshape345_input_additional_pre_layer, reshape345_output)


### Pull Request Readiness Checklist

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
- [ ] 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
2024-10-22 09:05:58 +03:00
..
caffe Merge pull request #20998 from alalek:update_protobuf_3.19.1 2021-11-10 12:03:45 +00:00
java Merge pull request #26056 from vpisarev:new_dnn_engine 2024-10-16 15:28:19 +03:00
js Merge pull request #25986 from asmorkalov:as/js_for_contrib 2024-08-23 10:49:08 +03:00
objc Merge pull request #26330 from alexlyulkov:al/new-engine-tflite-parser2 2024-10-22 09:05:58 +03:00
onnx Merge pull request #20998 from alalek:update_protobuf_3.19.1 2021-11-10 12:03:45 +00:00
plugin/openvino dnn: plugin support for OpenVINO 2022-10-07 16:57:31 +00:00
python Merge pull request #26056 from vpisarev:new_dnn_engine 2024-10-16 15:28:19 +03:00
tensorflow Merge pull request #20998 from alalek:update_protobuf_3.19.1 2021-11-10 12:03:45 +00:00
tflite Update FlatBuffers source code to 23.5.9 2023-05-10 14:39:36 +03:00
face_detector_accuracy.py Merge pull request #25463 from WanliZhong:ocvface2YuNet 2024-05-08 15:49:10 +03:00
quantize_face_detector.py Merge pull request #25463 from WanliZhong:ocvface2YuNet 2024-05-08 15:49:10 +03:00