How can i detect nose region in an image

I am working on face recognition. I want to know how can i localize nose region in an image. thanks in advance

Answer 1

[Image Analyst]

I'm sure you'll find a paper on that here: http://iris.usc.edu/Vision-Notes/bibliography/contentspeople.html#Face%20Recognition,%20Detection,%20Tracking,%20Gesture%20Recognition,%20Fingerprints,%20Biometrics.

The Computer Vision System Toolbox also has a face detection algorithm so maybe that will help you to get an approximate location. As you know the nose does not have a precise location. Where the nose starts and stops (its boundaries) is a judgment call. You can't pin it down to the nearest pixel, not even the tip of the nose.

[Lidank Abiel]

thank you sir

[Anand]

Use the classification model for the nose from the vision.CascadeObjectDetector.

Answer 2

[Andile Gumede]

You can use the cascade object detector that uses the Viola-Jones algorithm to detect people's faces, noses, eyes, mouth, or upper body. Here is a sample code below.

if true
%%nose detector
mouthDetector = vision.CascadeObjectDetector('Nose')
bbNose = step(mouthDetector, I)
INose = I(bbNose(1, 2):bbNose(1,2) +... 
bbNose(1, 4),bbNose(1, 1):bbNose(1, 1) + bbNose(1,3));
cropedNose = insertObjectAnnotation(INose,'rectangle',bbNose,'nose');
figure, imshow(cropedNose);

end