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PaddleDetection RKNPU2 Deployment Example

List of Supported Models

Now FastDeploy supports the deployment of the following models The PaddleDetection models that have been tested on RKNPU2 are as follows:

  • Picodet
  • PPYOLOE(int8)
  • YOLOV8

If detailed speed information is required, you can check out the RKNPU2 Model Speed Table

Prepare PaddleDetection deployment models and convert models

Before RKNPU deployment, you need to transform Paddle model to RKNN model:

Model Transformation Example

Notes

When deploying PPDetection models on RKNPU2, you may pay attention to the following points:

  • Include Decode for model export
  • Since RKNPU2 does not support NMS, the output nodes must be clipped before NMS
  • Limited by the RKNPU2 Div operator, the output nodes need to be clipped before the Div operator

From Paddle model to ONNX model

Because the rknN-toolkit2 provided by Rockchip does not support the direct support from Paddle models to RKNN models, you need to export the Paddle model to the ONNX model first, and then convert the ONNX model to the RKNN model.

# Taking Picodet as an example
# Download Paddle static map model and unzip it
wget https://paddledet.bj.bcebos.com/deploy/Inference/picodet_s_416_coco_lcnet.tar
tar xvf picodet_s_416_coco_lcnet.tar

# From static map to ONNX model. Attention: Align the save_file with the zip file name
paddle2onnx --model_dir picodet_s_416_coco_lcnet \
            --model_filename model.pdmodel \
            --params_filename model.pdiparams \
            --save_file picodet_s_416_coco_lcnet/picodet_s_416_coco_lcnet.onnx \
            --enable_dev_version True

# Fix shape
python -m paddle2onnx.optimize --input_model picodet_s_416_coco_lcnet/picodet_s_416_coco_lcnet.onnx \
                                --output_model picodet_s_416_coco_lcnet/picodet_s_416_coco_lcnet.onnx \
                                --input_shape_dict "{'image':[1,3,416,416], 'scale_factor':[1,2]}"

Write the yaml file

Modify normalize parameter

If you need to perform the normalize operation on NPU, configure the normalize parameters based on your model. For example:

mean:
  -
    - 123.675
    - 116.28
    - 103.53
std:
  -
    - 58.395
    - 57.12
    - 57.375

Modify outputs parameter The output node names of the transformation model are various based on different versions of Paddle2ONNX. Please use Netron and find the NonMaxSuppression node marked by the blue box below, and the node name in the red box is the target name.

For example, we can obtain the following image after visualization with Netron:

Find the NonMaxSuppression node marked by the blue box,and we can see the names of the two nodes marked by the red box: tmp_17 and p2o.Concat.9. So we need to modify the outputs parameter:

outputs_nodes:
  - 'p2o.Mul.179'
  - 'p2o.Concat.9'

From ONNX model to RKNN model

For your convenience, we provide python scripts that will enable you to quickly convert ONNX models to RKNN models through our pre-configured config file

model transformation

python tools/rknpu2/export.py --config_path 
tools/rknpu2/config/picodet_s_416_coco_lcnet_unquantized.yaml \
                              --target_platform rk3588

List of RKNN models

For people’s testing, we provide two models, picodet and ppyoloe, which can be used after unzipping:

Model Name Download Address
picodet_s_416_coco_lcnet https://bj.bcebos.com/paddlehub/fastdeploy/rknpu2/picodet_s_416_coco_lcnet.zip
ppyoloe_plus_crn_s_80e_coco https://bj.bcebos.com/paddlehub/fastdeploy/rknpu2/ppyoloe_plus_crn_s_80e_coco.zip

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