Transformation determination device and method for determining a transformation for image registration

US10121244B2 · kind B2 · utility

Assignee

• Siemens Healthcare Limited · DE

Inventors

• Oxana Gruenwald · Forchheim, DE
• Bernd Schreiber · Heroldsbach, DE

Key dates

• Filing date: Aug 25, 2016
• Grant date: Nov 6, 2018
• Expiry date: Oct 12, 2036

Classification

• Technology area (CPC G): Physics
• CPC primary: G06V2201/03
• WIPO field: Computer technology
• WIPO sector: Electrical engineering

Abstract

A method is for determining a transformation for image registration of a first image relative to a second image. The method includes ascertaining a test series of test elements including a test transformation and a test value, the ascertaining including ascertaining the test transformation based on a sequence of test transformations and/or based on previously ascertained test elements, transforming the first image via the ascertained test transformation, ascertaining a difference image, and ascertaining the test value of the test element based on the difference image such that the test value is a measure for an extension of a frequency distribution of values of pixels of the difference image in a direction of pixel value increase. It further includes determining a minimum test value based on test values encompassed by the test elements and determining the transformation which is the test transformation of a test element including the minimum test value.