Exercise:PCA and Whitening

From Ufldl

Jump to: navigation, search
(Step 0a: Load data)
(Step 0a: Load data)
Line 8: Line 8:
==== Step 0a: Load data ====
==== Step 0a: Load data ====
-
The starter code contains code to load some 12x12 natural images patches sampled from natural images. The raw patches will look something like this:
+
The starter code contains code to load some natural images and sample 12x12 patches from them. The raw patches will look something like this:
-
[[File:raw_images.png|240px|alt=Raw images|Raw images]]
+
[[File:raw_images.png|240px|alt=Raw patches|Raw patches]]
These patches are stored as column vectors <math>x^{(i)} \in \mathbb{R}^{144}</math> in the <math>144 \times 10000</math> matrix <math>x</math>.
These patches are stored as column vectors <math>x^{(i)} \in \mathbb{R}^{144}</math> in the <math>144 \times 10000</math> matrix <math>x</math>.

Revision as of 08:10, 29 April 2011

Personal tools