How to label multiple objects in object detection with different names?

Question

Banchon Sripanha 2018-12-17

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/436206-how-to-label-multiple-objects-in-object-detection-with-different-names

评论： Image Analyst 2020-4-23

采纳的回答： Image Analyst

Hi there!

I've a problem with labelling my objects in an image.

Let's have a look at the image:

This programme is detecting front/rear of the cars and a stop sign. I want the labels to say what they're looking at. For example: "Stop Sign Confidence: 1.0000", CarRear Confidence: 0.6446 and etc. As you may see, my programme adds the probability factors correctly. But there are still no strings/labelnames attached.

You can have a look at my code:

%%

% Read test image

testImage = imread('StopSignTest2.jpg');

% Detect stop signs

[bboxes,score,label] = detect(rcnn,testImage,'MiniBatchSize',128)

% Display detection results

label_str = cell(3,1);

conf_val = [score];

conf_lab = [label];

for ii=1:3

label_str{ii} = [ ' Confidence: ' num2str(conf_val(ii), '%0.4f')];

end

position = [bboxes];

outputImage = insertObjectAnnotation(testImage,'rectangle',position,label_str,...

'TextBoxOpacity',0.9,'FontSize',10);

figure

imshow(outputImage)

%%

I have NO clue in how to add strings in the label_str{ii} like the way I did with scores (num2str(conf_val(ii)).

Thanking you in advance!

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Sarannya Udhayakumar 2020-4-7

编辑：Sarannya Udhayakumar 2020-4-7

hello... how to detect multiple objects in RCNN???

pls rply

Image Analyst 2020-4-23

Maybe there is only one object in your image.

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Answer 1

Image Analyst 2018-12-17

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/436206-how-to-label-multiple-objects-in-object-detection-with-different-names#answer_352847

If insertObjectAnnotation() is not working, then use text().

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Banchon Sripanha 2018-12-18

在 MATLAB Online 中打开

Thanks for the response! Much appreciated.

I've fixed the problem by the following line code:

conf_val = [score];
conf_lab = [label];
for ii=1:3
    label_str{ii} = [sprintf('%s', conf_lab(ii)) ' Confidence: ' num2str(conf_val(ii), '%0.4f')];

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Answer 2

Quoc-Bao Ta 2019-9-25

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https://ww2.mathworks.cn/matlabcentral/answers/436206-how-to-label-multiple-objects-in-object-detection-with-different-names#answer_393420

编辑：Quoc-Bao Ta 2019-9-25

Hello, How can i change the colors of bounding box?

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