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Open Source Computer Vision Library

Home Page: https://opencv.org

License: Apache License 2.0

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opencv's Issues

ERROR during processing node with 2 inputs and 1 outputs: [Gather]:(onnx_node!Gather_383) from domain='ai.onnx'

System Information

OpenCV Python version: 4.6.0-dev
Operating System / Platform: Ubuntu 20.04
Python version: 3.8.10

model conversion with
onnx version: 1.13.1
onnx-simplifier 0.4.17

Detailed description

I try to use your onnx_nms_node branch with my yolov7 converted onnx model which includes the NMS layer, but I am getting an error message regarding a layer named Gather_383, seems like one of the constant input type is not supported there.

Here is the error log:

[ERROR:[email protected]] global /opt/opencv/modules/dnn/src/onnx/onnx_importer.cpp (1043) handleNode DNN/ONNX: ERROR during processing node with 2 inputs and 1 outputs: [Gather]:(onnx_node!Gather_383) from domain='ai.onnx'
Traceback (most recent call last):
  File "opencv_infer_video.py", line 54, in <module>
    vid_infer = video(target_gpu_id)
  File "opencv_infer_video.py", line 16, in __init__
    self.image_infer = Inference(target_gpu_id)
  File "/vision/opencv-inference/opencv_infer.py", line 41, in __init__
    self.net = cv2.dnn.readNetFromONNX(cfg.infer.onnx_model)
cv2.error: OpenCV(4.6.0-dev) /opt/opencv/modules/dnn/src/onnx/onnx_importer.cpp:1065: error: (-2:Unspecified error) in function 'handleNode'
> Node [[email protected]]:(onnx_node!Gather_383) parse error: OpenCV(4.6.0-dev) /opt/opencv/modules/dnn/src/onnx/onnx_importer.cpp:579: error: (-5:Bad argument) Blob 638 not found in const blobs in function 'getBlob'

Attached here is a screenshot of the ONNX graph where node Gather_383 and its input 638 in the NODE Properties panel
link: https://drive.google.com/file/d/1Ar474RQZkuHRiCpmQ8cwZ27Mcs8rz5ij/view?usp=share_link

Steps to reproduce

Python

1. Build OpenCV using   `onnx_nms_node` [branch](https://github.com/opencv/opencv/pull/22473)
2. run

import cv2
net = cv2.dnn.readNetFromONNX(onnx_model_path)

Issue submission checklist

  • I report the issue, it's not a question
  • I checked the problem with documentation, FAQ, open issues, forum.opencv.org, Stack Overflow, etc and have not found any solution
  • I updated to the latest OpenCV version and the issue is still there
  • There is reproducer code and related data files (videos, images, onnx, etc)

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