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Face Detection - MATLAB CODE

                                  Lets see how to detect face, nose, mouth and eyes using the MATLAB built-in class and function. Based on Viola-Jones face detection algorithm, the computer vision system toolbox contains vision.CascadeObjectDetector System object which detects objects based on above mentioned algorithm.
  
Prerequisite: Computer vision system toolbox

FACE DETECTION:

clear all
clc
%Detect objects using Viola-Jones Algorithm

%To detect Face
FDetect = vision.CascadeObjectDetector;

%Read the input image
I = imread('HarryPotter.jpg');

%Returns Bounding Box values based on number of objects
BB = step(FDetect,I);

figure,
imshow(I); hold on
for i = 1:size(BB,1)
    rectangle('Position',BB(i,:),'LineWidth',5,'LineStyle','-','EdgeColor','r');
end
title('Face Detection');
hold off;




The step(Detector,I) returns Bounding Box value that contains [x,y,Height,Width] of the objects of interest.


BB =

    52    38    73    73
   379    84    71    71
   198    57    72    72

NOSE DETECTION:


%To detect Nose
NoseDetect = vision.CascadeObjectDetector('Nose','MergeThreshold',16);



BB=step(NoseDetect,I);


figure,
imshow(I); hold on
for i = 1:size(BB,1)
    rectangle('Position',BB(i,:),'LineWidth',4,'LineStyle','-','EdgeColor','b');
end
title('Nose Detection');
hold off;





EXPLANATION:


To denote the object of interest as 'nose', the argument  'Nose' is passed.

vision.CascadeObjectDetector('Nose','MergeThreshold',16);

The default syntax for Nose detection :
vision.CascadeObjectDetector('Nose');

Based on the input image, we can modify the default values of the parameters passed to vision.CascaseObjectDetector. Here the default value for 'MergeThreshold' is 4.

When default value for 'MergeThreshold' is used, the result is not correct.
Here there are more than one detection on Hermione.




To avoid multiple detection around an object, the 'MergeThreshold' value can be overridden. 


MOUTH DETECTION:



%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;



EYE DETECTION:


%To detect Eyes
EyeDetect = vision.CascadeObjectDetector('EyePairBig');

%Read the input Image
I = imread('harry_potter.jpg');

BB=step(EyeDetect,I);



figure,imshow(I);
rectangle('Position',BB,'LineWidth',4,'LineStyle','-','EdgeColor','b');
title('Eyes Detection');
Eyes=imcrop(I,BB);
figure,imshow(Eyes);







Cropped Image


I will discuss more about object detection and how to train detectors to identify object of our interest in my upcoming posts. Keep reading for updates.

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85 comments:

Unknown said... Reply to comment

I have MATLAB of version R2010a which does not have the Computer vision system toolbox.How to detect eyes,mouth,nose in that case?

Aaron Angel said... Reply to comment

@Rohini Bhargava

You need to install 'Computer vision system toolbox' . For more information, visit http://www.mathworks.in/products/computer-vision/ .

Pragadeesan said... Reply to comment

@AaronAngel_ hi ...i am doing a mini project on matlab....pls help me... i need to capture image ,recognize the customer ,display his names.

Unknown said... Reply to comment

i hav matlab version 7. how do i perform face recognition on that.. please help..

Unknown said... Reply to comment

can some0ne tell me how to install computer vivsion toolbox

Unknown said... Reply to comment

i m doing a major projct on matlab... plz tell me how to campare or recognize captured image with the image stored in database and will display the name

Unknown said... Reply to comment

i m doing my major project on matlab..plz tell me how to campare or recognize captured image with the image stored in database and will be display the name after successful matching...

Unknown said... Reply to comment

thnk u very much....i was wondering how to detect the facial features.....it is interesting.

Unknown said... Reply to comment

@nishant agrawalhaan yr ye he humein samajh nhe aa rhe tujhe pta chale to reply zarur karna yaad se bhoolna mat.....

Unknown said... Reply to comment

Dear friend
what your Principle on ur mouth and eyes detection?

Unknown said... Reply to comment

Dear friend
What Theory or Principle on your mouth and eyes ?
I want to do research in this area thanks more^^

Unknown said... Reply to comment

how to separate left eye and right eye?

ram said... Reply to comment

hey !!! can you help me in Iris localaization
?

Admin said... Reply to comment

Dear Friend. How to identify a face in snap?? Please response me

Admin said... Reply to comment

How to identify a face in snap???

Unknown said... Reply to comment

how can i find the centre of the squares that detects eyes or nythiing???

Unknown said... Reply to comment

Hello!!!
I am an assistant professor in an engg college and need an account on MATLAB. Please tell me the procedure

xx said... Reply to comment

Can you give me the m file?

Unknown said... Reply to comment

but i dnt hv control vision toolbox,witout that vision cascade object detector method is not possible?wat can i do?

Unknown said... Reply to comment

computer vision system tool box in matlab which verision

KT said... Reply to comment

There's something wrong with mouth detection. It detects everything like eyes and nose. On the other great tutorial thanks!

Hana said... Reply to comment

Could you please tell me are you using Viola and jones algorithm only or you used Adaboost beside ?

Anonymous said... Reply to comment

It's very useful, thank you!

Unknown said... Reply to comment

i have requested for the toolbox but how to install it.???

Malek said... Reply to comment

thank u

K@NN@N said... Reply to comment

Hi i m so interested in face reconition. Pls can you tell me how to capture the watch on the wrist of a person and to display the current time on that watch

K@NN@N said... Reply to comment

Hi i m interested in face and object recogonition. Pls can you tellme how to capture the image of the watch in the wrist of a person and to display the current time on the watch. Pls rply me its very urgent for the part of my project in matlab

K@NN@N said... Reply to comment

Hi i m so interested in face reconition. Pls can you tell me how to capture the watch on the wrist of a person and to display the current time on that watch

Unknown said... Reply to comment

thanks. I need to detect eyes, mouth and nose in different images simultaneousely. how can I set Mergethreshold value?

Unknown said... Reply to comment

I need to detect eyes, mouth and nose in many different images. but Mergethreshold value must be different in different images. what can J do?

Unknown said... Reply to comment

hey this is awesome thanks for sharing this
can you help me out to detect the ears from the image using any matlab algorithm

thank you ..

Unknown said... Reply to comment

How it can be trained by our own images????

Unknown said... Reply to comment

How can We train it by our own images??
plx Reply

Aaron Angel said... Reply to comment

@Arslan mohalUse 'trainCascadeObjectDetector'

Unknown said... Reply to comment

I am wondering whether the same can be applied for the detection of say, number plates?

rosh said... Reply to comment

hai..I would like to know whether we can detect the eyes and nose in same window?? for that what we have to do for multiple detection in single image

Unknown said... Reply to comment

hello!
I'm learning about identifying and catching face,. Can you help me?

Unknown said... Reply to comment

how can i create a code for facial expression

Belajar dan Belajar said... Reply to comment

how can i create a contour of mouth

Unknown said... Reply to comment

How can i fit spectacles in an eyes using matlab.

Unknown said... Reply to comment

showing error in FDetect = vision.CascadeObjectDetector;
Plz tell me the solution

Unknown said... Reply to comment

How we store 3d images

Arun said... Reply to comment

just search in mathworks+Computer vision toolkit+trial version. After registering they will give you one password to access it.

Arun said... Reply to comment

very nice explanation. But in nose detect and mouth detect only one or two persons detection only working. No error. Everything working fine.

Can you provide same code in GUI mode?? How can i build a button and Image_window based on this code??

Arun said... Reply to comment

@Rohini Bhargava Download a Trial version of Toolkit from mathworks.com website.

Unknown said... Reply to comment

how can i detect all the features on one image like the nose,mouth ,eyes and the face on the same image not separately

Unknown said... Reply to comment

how can i detect all the features on one image like the nose,mouth ,eyes and the face on the same image not separately

Unknown said... Reply to comment

how can i detect all the features on one image like the nose,mouth ,eyes and the face on the same image.

Unknown said... Reply to comment

how can i detect points on face///

Unknown said... Reply to comment

how to detect points on face

Unknown said... Reply to comment

how to code image matching in android studio with opencv

Unknown said... Reply to comment

Eye detection is giving error :


Error using rectangle
Value must be a 4 element vector

Error in extend_ex (line 12)
rectangle('Position',BB,'LineWidth',4,'LineStyle','-','EdgeColor','b');

Unknown said... Reply to comment

This blog awesome and i learn a lot about programming from here.The best thing about this blog is that you doing from beginning to experts level.

Love from

Unknown said... Reply to comment

hi can you suggest me how to detect facial feature point?

Unknown said... Reply to comment

Hi, can you suggest a solution how to detect facial feature points. Thank you

Unknown said... Reply to comment

How To detect nose of Animals?
plz give me a code for Detection of nose of animal...
Thanx

Unknown said... Reply to comment

need code for NOse detection Of Animal
urgent

Unknown said... Reply to comment

Good, Matlab 2014 has these facilities......

عبدالعزيز بابكر محمد said... Reply to comment

I am doing a research on comparing image using elliptic biharmonic equation in face recognition, I already derived the equation and get the matrix and combined this matrix with images successful get the difference between the image so I need how to you this information to classify between the images if any image has the individual parameter
thank you

Unknown said... Reply to comment

Hi, plz.how can i detect the mouth region ?

Unknown said... Reply to comment

i used this code but some extra boxes is drawa in face
so pleas give me a solution and if i watns to detect a realtime face the how to detect

Vishwanath Reddy said... Reply to comment

how to read the values of those nose , eyes, mouth since i want to store the all the values in database .

Unknown said... Reply to comment

do you have face recognition code

Unknown said... Reply to comment

Anyone can provide me face swapping code

Unknown said... Reply to comment

how do i match two image (face same but different image).please help me!!!!!!!!!!!!!

vennila said... Reply to comment

sir please we want to a face spoofing detection using chrome components in matlab code

Unknown said... Reply to comment

please send me the code of 'PCB fault detection using matlab'.

Unknown said... Reply to comment

someone please send me matlab code for PCB fault detection using matlab.

osama shahin said... Reply to comment

To avoid the error in this step, try to use BB(1,:) instead of BB in the last two lines

Khaled said... Reply to comment

how to detect face for a single image from different angles, plz

Khaled said... Reply to comment

how can i detect face from different angles?

Unknown said... Reply to comment

I want to recognize facial expressions in matlab some help plz

Unknown said... Reply to comment

how to detect hand gesture? help me plzz

Unknown said... Reply to comment

is the any response from anybody here? How can I then make the detected region black so that I can hide the user face?

Geblatjuba said... Reply to comment

how about detection acne in faces? what the command in vision.CascadeObjectDetector?

Unknown said... Reply to comment

aoa... how can i detect the eye from real time video ??

Unknown said... Reply to comment

aoa... how can i detect the eye from real time video ??

Unknown said... Reply to comment

@nishantagrawal i also want the same as you were told "plz tell me how to campare or recognize captured image with the image stored in database and will display the name" please anybody do know everything about this project reply me or send me the link or anything that is resembles with this project send to ankityadavv786@gmail.com

Unknown said... Reply to comment

hi iam doing my major project in image processing,plz tell me how to detect line in mural image by template orientation

Unknown said... Reply to comment

hi iam doing my major project in image processing please tell me how to detect line from mural image by template orientation process using matlab

Unknown said... Reply to comment

Can you give me code for ear detection along the face detection

Unknown said... Reply to comment

I want ear detection

Abohaneen said... Reply to comment

I want face recognition code

Unknown said... Reply to comment

Hi dear
I want to use the backpropagation algorithm for face recognition. How can I get this coding?

I hope to give me ur feedback

kind regards

Sarhan

Unknown said... Reply to comment

hello, can anyone provide me Matlab code for skin disease detection
thank you,,,,

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