what is the change of dnn module in opencv4.1?

edit

thanks a lot! May ask you how cv:dnn to read the model from text graphs? I know how to use it but I don't know where can I find the whole source code.

@lunasdejavu, It's a text version of binary .pb files. They are serialized with protobuf. I think you can use existing .pbtxt files for reference.

I know I have used it several times. Since I need to read the custom model, I have to write the readNetfromTensorflow() on my own, can you tell me how to do it?

@lunasdejavu, feel free to open a feature request at https://github.com/opencv/opencv/issues. It might be a complicated task due TensorFlow represents graphs using low-level nodes such Add, Mul etc. And it's required to apply some graph transformations depends on it's type (for now we can process SSDs, Faster R-CNNs and Mask R-CNNs from TF OD API but there are different scripts for each of them).

@dkurt what if I use pytorch instead of tensorflow? I thought readNetfromTorch only need the model file so that I can just use any customized model I want?

PyTorch model should be converted to ONNX. Use cv::dnn::readNet or readNetFromONNX

@dkurt then what is cv.dnn.readNetFromTorch for? what kind of models can be read by it?

Please use a documentation: https://docs.opencv.org/master/d6/d0f...