How to apply SIFT to patch of image?

I have divided face image of size 200 x 150 into patches of size 32 x 32.
Now i have to apply scale invariant feature transform (SIFT) to each patch.
so, any body have code for SIFT, please provide me or mail me to khanhina012@gmail.com. Thanks in advance.....

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on 3 Dec 2012

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