How to align face images c++ opencv

Question

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 HaarC

Answer 1

Finding the accurate position of the eyes in a given image is far from trivial. The Haar-cascades for finding the eyes in OpenCV produce too many false positive to be useful, moreover this approach won't be robust to image rotation (it may compensate slight rotation though, I don't know the training images). If I were you I'd start a breadth-first search on http://scholar.google.com for relevant papers of this research area.

You'll need a robust head pose estimation for aligning face images. I did some research myself and I think sharing algorithms and code is useful here. The most interesting approaches I have seen are:

• Gary B. Huang, Vidit Jain, and Erik Learned-Miller. Unsupervised joint alignment of complex images. International Conference on Computer Vision (ICCV), 2007. (Project page), (PDF Online available), (Source code)

• X. Zhu, D. Ramanan. Face Detection, Pose Estimation and Landmark Localization in the Wild Computer Vision and Pattern Recognition (CVPR) Providence, Rhode Island, June 2012. (Project page), (PDF Online available), (Source code)