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How to align face images c++ opencv

Asked 2012-04-13T15:15:38.470
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I am developing a C++ application for face authentication. First, I have to detect the face and pre-process the image.

  1. For face detection I have used the HaarCascadeClassifier. The problem is that the this tool or this algorithm gives me a facial region detected by a little bit large rectangle that englobes hair and some of the background. Is there a solution to change the dimension of this rectangle? I used "frontalfacecascaadclassifier.xml".
  2. For face pre-processing i want to do face alignment exactly like this technique. How would I go about accomplishing this?
c++ opencv face-detection face-recognition
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Detecting misaligned faces make face recognition difficult. Sometimes you want to fix the alignment, sometimes it is sufficient to exclude the ones that aren't aligned correctly (for instance if you're detecting faces in a video stream). I took the latter approach and trained a special Haar Cascade to only detect correctly aligned, well-lit faces. Details here: http://rwoodley.org/?p=417.

If you use my cascade let me know how it works for you. I'm curious what results others would obtain. It met my needs.

answered 2013-05-21T13:42:51.227

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