Patent · US Active

Detecting a change between images or in a sequence of images

US8509549B2 · kind B2 · utility

2Cited by

3References

13Claims

0Family size

Assignee

Fraunhofer-Gesellschaft zur förderung der angewandten Forschung e.V. · DE

Inventors

Michael Schoeberl · Erlangen, DE
André Kaup · Hohenkirchen, DE

Key dates

Filing date	Oct 14, 2011
Grant date	Aug 13, 2013
Priority date	—
Expiry date	Oct 14, 2031

Classification

Technology area (CPC H)Electricity
CPC primaryH04N19/87
WIPO fieldAudio-visual technology
WIPO sectorElectrical engineering

Abstract

Detecting a change between images is performed more effectively when a measure of change is used for the detection that depends on a length of the code blocks to which the images are individually entropy-encoded, and which are allocated to different sections of the respective image, since the length of these code blocks is also available without decoding. This uses the fact that the length or amount of data of a code block directly depends, in large parts, on the entropy and hence on the complexity of the allocated image section, and that changes between images are, with high probability, also reflected in a change of complexity.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.