Image processing device and method for producing in real-time a digital composite image from a sequence of digital images

US10776902B2 · kind B2 · utility

Assignee

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

Inventors

• Tobias Bergen · Erlangen, DE
• Michaela Benz · Erlangen, DE
• Andreas Ernst · Bollschweil, DE
• Thomas Wittenberg · Erlangen, DE
• Christian Muenzenmayer · Langenzenn, DE
• Frederik Zilly · Berlin, DE
• Malte Avenhaus · Ergolding, DE

Key dates

• Filing date: May 30, 2019
• Grant date: Sep 15, 2020
• Expiry date: May 30, 2039

Classification

• Technology area (CPC H): Electricity
• CPC primary: H04N23/555
• WIPO field: Audio-visual technology
• WIPO sector: Electrical engineering

Abstract

Image processing device for producing in real-time a digital composite image from a sequence of digital images recorded by a camera device, in particular an endoscopic camera device, the image processing device including a selecting unit, a key point detection unit, a transforming unit and a joining unit,wherein the key point detection unit includes a maximum detection unit configured for executing following steps separately for the filter response for the reference image and for the filter response for the further image, wherein a variable threshold is used: i) creating blocks by dividing the respective filter response, ii) calculating the variable threshold for each of the blocks, iii) discarding those blocks of the blocks from further consideration, in which the respective filter response at a reference point of the respective block is less than the respective variable threshold.