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** PCA
* Download csu FacePerf software:
** normalization schedule:1. Integer to float conversion - Converts 256 gray levels into floating point equivalents.2. Geometric normalization – Lines up human chosen eye coordinates.3. Masking – Crops the image using an elliptical mask and image borders such that only the face from forehead to chin and cheek to cheek is visible.4. Histogram equalization – Equalizes the histogram of the unmasked part of the image.5. Pixel normalization – scales the pixel values to have a mean of zero and a standard deviation of one. ** default face normalization parameters <code>
/* default normalization parameters */
#define ELLIPSE_X 65.0
