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face recognition (different image size)

asked 2012-08-20 01:02:03 -0600

mrgloom gravatar image

updated 2012-08-20 01:11:34 -0600

I have set of face images, but they have different size.I know I can resize all, but maybe there is scale invariant approach? And how can I align faces?

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answered 2012-08-20 01:12:51 -0600

updated 2012-08-20 12:52:14 -0600

Try to use Local Binary Patterns Histograms, they don't require your input images to be of equal size:

And for face alignment, you can find a script in the chapter Aligning Face Images of the OpenCV Face Recognition tutorial at:

This should be easy to translate to any language you want, ssee Sorin's C# version for example:

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answered 2012-08-20 05:21:00 -0600

smiron gravatar image

For the face alignment problem you can detect the eyes using haar-cascade, calculate the angle and rotate the picture (Philipp Wagner has some excellent tutorials for this). I successfully used this method to align faces in my master thesis project (

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Asked: 2012-08-20 01:02:03 -0600

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Last updated: Aug 20 '12