Array indices must be positive integers or logical values in facial detection

Question

Evan Rose 2021-3-23

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https://ww2.mathworks.cn/matlabcentral/answers/780927-array-indices-must-be-positive-integers-or-logical-values-in-facial-detection

回答： Shashank Gupta 2021-3-29

Good afternoon,

I am not sure why i am getting this error returned when i am using the following code;

faceDetector = 'vision.CascadeObjectDetector';
I = imread('INSERT PICTURE LOCATION HERE');
bboxes = faceDetector(I);
IFaces = insertObjectAnnotation(I,'rectangle',bboxes,'Face');   
figure
imshow(IFaces)
title('Detected faces');

I am not sure what this error means as the pixel values i am using are all positive values so I am very confused. What can I do to achieve a successful output?

Thanks.

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Geoff Hayes 2021-3-23

Evan - please copy and paste the full error message to this question so that we can see which line of code is throwing the error.

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Answer 1

Shashank Gupta 2021-3-29

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https://ww2.mathworks.cn/matlabcentral/answers/780927-array-indices-must-be-positive-integers-or-logical-values-in-facial-detection#answer_661709

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Hi Evan,

I think you got confused in defining a facedetector. Check out the following code, this might help you.

faceDetector = vision.CascadeObjectDetector(); % Correct way to define this object.
I = imread('INSERT PICTURE LOCATION HERE'); % Read an image.
bboxes = faceDetector(I); % call the function.
IFaces = insertObjectAnnotation(I,'rectangle',bboxes,'Face');   
figure
imshow(IFaces)
title('Detected faces');