feature extraction of an image

hi sir/mam

      i m doing my project in image processing..i want to extract the features of an image using the following algorithms

            1=>contour edge detection
            2=>pca
            3=> geometric feature extraction
plz help me ..thanx in advance

[Aya Ahmed]

have you reach to the solution of how to extract the features of an image using pca ????

if you reach please help me

[Image Analyst]

Aya, what features are you concerned about? The (x,y) locations of all the edge pixels? Something else? Please start your own question and attach your image. In the meantime, I've attached some of my demos for you.

Answer 1

[Image Analyst]

Well, first you read in your image with imread(), and then you apply functions such as bwlabel, regionprops, imshow, etc. See demo in my File Exchange if you want tutorials and demo code. http://www.mathworks.com/matlabcentral/fileexchange/?term=authorid%3A31862