How to train ACF detector with groundTruthMultisignal object

Question

Liam Viney 2024-6-24，7:10

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/2131311-how-to-train-acf-detector-with-groundtruthmultisignal-object

编辑： Malay Agarwal 2024-6-27，9:46

I have labeled a data set of sonar images using the ground truth labler, and I want to use the lables in the trainACFObjectDetector function, to create a detector for further labeling. I used the ground truth labeler app because I can play a rgb video alongside the sonar feed, aiding with identifying objects in the sonar images. However the ground truth app producess a groundTruthMultisignal object, and I am unsure how to use this to train an ACF detector.

%% train acf detector
imds = sonar_files;     % conatins path to each image
load("rec0gt.mat")
T = table(gTruth.ROILabelData.processed_sonar);
blds =  boxLabelDatastore(T);
ds = combine(imds,blds);
acfDetector = trainACFObjectDetector(ds,NegativeSamplesFactor=2);

0 个评论
显示 -2更早的评论隐藏 -2更早的评论

请先登录，再进行评论。

请先登录，再回答此问题。

Answer 1

Malay Agarwal 2024-6-24，8:21

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/2131311-how-to-train-acf-detector-with-groundtruthmultisignal-object#answer_1476166

编辑：Malay Agarwal 2024-6-27，9:46

在 MATLAB Online 中打开

Hi @Liam Viney,

I understand that you want to train an ACF detector using labeled data you've created using the Ground Truth Labeler App.

This is possible using the "gatherLabelData" function, which takes in a "groundTruthMultisignal" object and extracts the label data from it.

Please refer to the following link for an example on how to use the "gatherLabelData" function to create a training dataset for an object detector model: https://www.mathworks.com/help/driving/ref/groundtruthmultisignal.gatherlabeldata.html#mw_740aa793-a8dc-497a-b997-becab36ace46.

In the example, after this code:

imds = imageDatastore(fileNames{1});
blds = boxLabelDatastore(labelData{1});

You can combine the two datastores using the "combine" function and then use the combined datastore with "trainACFObjectDetector" to train an ACF detector.

Please refer to the following links for more information:

"gatherLabelData" documentation - https://www.mathworks.com/help/driving/ref/groundtruthmultisignal.gatherlabeldata.html
"combine" documentation - https://www.mathworks.com/help/matlab/ref/matlab.io.datastore.combine.html

Hope this helps!

1 个评论
显示 -1更早的评论隐藏 -1更早的评论

Liam Viney 2024-6-25，6:52

Thank you, I got it working.

Another issue I had was that I was using rotated rectangles for my labeling, which I dont think is supported by trainACFObjectDetector. I switched to axis orientated rectangles and everything seems to be working.

请先登录，再进行评论。