imagedesc_getpca

PURPOSE

Runs descriptor on a subset of cuboids or images to get PCA coefficients.

SYNOPSIS

function imdesc = imagedesc_getpca( I, imdesc, k, show )

DESCRIPTION

 Runs descriptor on a subset of cuboids or images to get PCA coefficients.

 INPUTS
   I               - 3D array of images or 4D array of cuboids
   imdesc          - descriptor to apply to each image or cuboid
   k               - number of PCA coefficients to use [note: k can be later reduced]
 
 OUTPUTS
   imdesc          - new imdesc with PCA information

CROSS-REFERENCE INFORMATION

This function calls:

imagedesc Runs descriptor on a set of images, optionally jitters, and optionally applies PCA.

This function is called by:

imagedesc_demo Demo to show how imagedesc works.
featuresLGpca Dimensionality reduction for cuboids descriptors.
featuresSMpca Dimensionality reduction for cuboids descriptors.