how to extract features from images for face detection

i want to do face recognition in matlab,how i will extract the features from images and which features please help me

[Walter Roberson]

That's an algorithm question, not a MATLAB question.

[abhishek kumar]

you can extract it either by getting its matrix value then calculate eigen value and eigen vector of that and so on

[vikash jha]

How can I get matrix value .

Answer 1

[Image Analyst]

The Computer Vision System toolbox has face detection. Then you can use the Image Processing toolbox to measure features such as color, etc.

[muzafar]

there are many algorithms,i want the algorithm steps i,e which steps i have to follow,i don't want to use tool box,want to do it by code,and which technique i will use for feature extraction

[Image Analyst]

See my Image Segmentation Tutorial. It goes through the basic steps of thresholding, labeling, and regionprops.