MATLAB Answers

How to detect eyes and mouth on a single image in MATLAB?

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Anand
Anand on 6 Mar 2014
Answered: 123 on 22 Mar 2018
At the moment this code detect eyes and mouth in separate images, how can i combine these facial parts in 1 image, does anyone know how i would combine these features and output them in a single image.
Thankyou
%Read the input image I = imread('extract1.png');
%To detect Mouth
MouthDetect = vision.CascadeObjectDetector('Mouth','MergeThreshold',16);
BB=step(MouthDetect,I);
figure,
imshow(I); hold on
for i = 1:size(BB,1)
rectangle('Position',BB(i,:),'LineWidth',4,'LineStyle','-','EdgeColor','r');
end
title('Mouth Detection');
hold off;
%To detect Eyes
EyeDetect = vision.CascadeObjectDetector('EyePairBig');
BB=step(EyeDetect,I);
figure,imshow(I);
rectangle('Position',BB,'LineWidth',4,'LineStyle','-','EdgeColor','b');
title('Eyes Detection');

Accepted Answer

Anand
Anand on 6 Mar 2014
%Read the input image
I = imread('extract1.png');
%To detect Mouth
MouthDetect = vision.CascadeObjectDetector('Mouth','MergeThreshold',16);
BB=step(MouthDetect,I);
figure,
imshow(I); hold on
for i = 1:size(BB,1)
rectangle('Position',BB(i,:),'LineWidth',4,'LineStyle','-','EdgeColor','r');
end
%To detect Eyes
EyeDetect = vision.CascadeObjectDetector('EyePairBig');
BB=step(EyeDetect,I);
hold on
rectangle('Position',BB,'LineWidth',4,'LineStyle','-','EdgeColor','b');
Just don't create a second figure like you're doing. Use the same figure and hold on.

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More Answers (2)

veeresh singh
veeresh singh on 2 May 2014
the above algo detects the regions by surrounding them with the rectangle regions...how to display the rectangular regions separately?...any code for automatically cropping that region and display it separately?

  2 Comments

Image Analyst
Image Analyst on 2 May 2014
That's not how it detects them. That's how it indicates them so you can see what it found, after they've been detected. You can crop out the sub image like this:
subImage = imcrop(I, BB); % Crop box BB out of image "I".
PRABHJOT SINGH
PRABHJOT SINGH on 1 Oct 2014
x = imcrop(I,BB(i,:));
imshow (I)
this would work and solve your problem ;)

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123
123 on 22 Mar 2018
Can someone please give me a code to find the eyes and mouth. thank you very much

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