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How to start to program face recognition?

asked 2013-04-13 09:54:22 -0500

Adrianos01 gravatar image

Hey There,

i want to write a program face recognition Program with OpenCV. This programm must do: If the face not in database send a sms to user. I have researched in internet that i can use for face recognation haarcascade...xml files or eigenface algorithm.

What ist better eigenface or haarcascade?

How can i start to write this program?

I use the System Linux and i have installed the OpenCV-Libraries and i can use OpenCV-Libraries with CodeBlocks.

Please help me with to write this project.

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answered 2013-04-13 10:23:08 -0500

berak gravatar image

updated 2013-04-13 10:27:32 -0500

the haarcascades are used for face detection, the eigen/fisher/lbp methods for face recognition

but a typical program will need both, a haar-detection first, to restrict the processing to the face area, and a face-recognizer after that.

let's think for now, that you got pre-cropped images of the persons (say, 90x90).

you create a facerecogizer:

Ptr<FaceRecognizer> model = createEigenFaceRecognizer();

then it needs to get trained. for every person you need some images(say 10), load them (grayscale), and put them into a vector<mat>. also you need to track which person it was, so it needs another vector<int> with person-ids, one for each image. now we can train it:

model->train(images, labels);

after that is done, you can test if it regognizes persons, you give it a grayscale image ( same size ) and call:

int predictedLabel = model->predict(testSample);

you'll get back the id of the person it was most similar to.

again, look here for the recognition example, and here for the detection

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Thank you i will try it.

Adrianos01 gravatar imageAdrianos01 ( 2013-04-14 12:35:51 -0500 )edit
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Asked: 2013-04-13 09:54:22 -0500

Seen: 964 times

Last updated: Apr 13 '13