How to import a trained object detector to Simulink?

Question

Chandni S Vijay 2022-11-28

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https://ww2.mathworks.cn/matlabcentral/answers/1865583-how-to-import-a-trained-object-detector-to-simulink

编辑： Ashu 2023-1-25

Hi. I have trained an object detector using trainYOLOv4ObjectDetector() function and now I want to add this detector to my Simulink model to detect the objects from the images I pass through in the Simulink model. Is there any way to import it? I tried using Deep learning object detector block but its not working. Could someone guide me through this?

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Answer 1

Ashu 2023-1-24

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https://ww2.mathworks.cn/matlabcentral/answers/1865583-how-to-import-a-trained-object-detector-to-simulink#answer_1155055

编辑：Ashu 2023-1-25

在 MATLAB Online 中打开

Hi Chandni,

You can use a MATLAB Function block in simulink to load the trained object detector .

To work with MATLAB Function block you can refer :

https://www.mathworks.com/help/simulink/ug/what-is-a-matlab-function-block.html

Inside the function you can have your custom code and make predictions like this

% Assuming trainedDetector.mat is the saved object detector
trainedDetector = load('trainedDetector.mat', 'trainedDetector')
I = imread('highway.png');
[bboxes, scores, labels] = detect(trainedDetector,I,Threshold=0.05);
detectedImg = insertObjectAnnotation(I,"Rectangle",bboxes,labels);