Figure - PMC

Skip to main content

An official website of the United States government

Here's how you know

Here's how you know

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you've safely connected to the .gov website. Share sensitive information only on official, secure websites.

View full-text article in PMC

. 2009 Apr 3;5(4):e1000336. doi: 10.1371/journal.pcbi.1000336

Search in PMC
Search in PubMed
View in NLM Catalog
Add to search

Eichhorn et al.

This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are properly credited.

PMC Copyright notice

Average differential entropy for the pixel basis (PIX), after separation of the DC component (DCS), and after application of the different decorrelation transforms. The difference between PIX and RND corresponds to the redundancy reduction that is achieved with a random second-order decorrelation transform. The small difference between RND and ICA is the maximal amount of higher-order redundancy reduction that can be achieved by ICA. Diagram (A) shows the results for chromatic images and diagram (B) for gray value images. For both types of images, only a marginal amount can be accounted to the reduction of higher order dependencies.

Inline graphic — Average differential entropy for the pixel basis (PIX), after separation of the DC component (DCS), and after application of the different decorrelation transforms. The difference between PIX and RND corresponds to the redundancy reduction that is achieved with a random second-order decorrelation transform. The small difference between RND and ICA is the maximal amount of higher-order redundancy reduction that can be achieved by ICA. Diagram (A) shows the results for chromatic images and diagram (B) for gray value images. For both types of images, only a marginal amount can be accounted to the reduction of higher order dependencies.