Calculates Fisher Vectors for a set of descriptors given a GMM.
Means - flat array in center-major order.
Number of dimensions of each center.
Number of GMM cluster centers.
The variances of the GMM centers in center-major order.
The weights of the GMM in center order.
Bag of descriptors on which to compute the GMM.
The Fisher Vector for the input descriptors.
Compute a mixture of Gaussians given a set of sample points.
Number of Gaussians to estimate.
Number of dimensions of each sample.
The samples (in sample-major order).
The Gaussians, their variances, and their weights in a single flat array. (Center-major order).