ITK/Patent Bazaar

The Insight Toolkit provides a very open licensing mechanism that allows the use of the software for research, education and comercial applications. This very open license enters in conflict with methods that have been patented. In short, patented methods have inherit restrictions that make them non-suitable to be distributed under the ITK license. In plain words:

   Patented algorithms can not be distributed with ITK

A surprisingly large number of image processing algorithms and methods are covered in full or in part a patents. What makes this even more dificult is the fact that in order to figure out if a particular method is patented you have to search on your own. This page is intended as an open space to welcome any notifications regarding methods that have been patented. In this way, users of the toolkit will be able to make informed decisions regarding whether they use or not such methods. The responsibility for seeking permision from patent holders remains in the users.

Where to search for Patents

The following are the official databases where you can search for issued patents.

United States Patent and Trademark Office

       http://www.uspto.gov/

Common algorithms that are known to be patented

Correlation Ration Metric for Registration

United States Patent 6,539,127 Roche , et al. March 25, 2003 Electronic device for automatic registration of images

Abstract

An electronic data processing device receives first and second data sets representing first and second comparable digital images. It comprises registration means comprising a first module which calculates a main function representative of the correlation ratios between the data of the first and second sets, and a second module which determines a registration transformation between one of the images and the other from the main function.

Inventors: Roche; Alexis (Antibes, FR); Ayache; Nicholas (Nice, FR); Malandain; Gregoire (Antibes, FR); Pennec; Xavier (Antibes, FR) Assignee: Inria Institut National de Recherche (Le Chesnay Cedex, FR) Appl. No.: 361313 Filed: July 27, 1999