Method and device for the non-contact determination of color and intensity variations over time in objects

US12053267B2 · kind B2 · utility

Assignees

• Friedrich-Schiller-Universitat Jena · DE
• UNIVERSITÄTSKLINIKUM JENA · DE
• OTTO-VON-GUERICKE-UNIVERSITAT MAGDEBURG · DE
• Fraunhofer-Gesellschaft zur förderung der angewandten Forschung e.V. · DE

Inventors

• Jan Sperrhake · Jena, DE
• Thomas Pertsch · Oettingen, DE
• Maria Nisser · Jena, DE
• Michal Rapczynski · Magdeburg, DE
• Ayoub Al-Hamadi · Magdeburg, DE
• Chen Zhang · Redmond, US
• Gunther Notni · Jena, DE

Key dates

• Filing date: Nov 26, 2020
• Grant date: Aug 6, 2024
• Expiry date: Jul 24, 2041

Classification

• Technology area (CPC G): Physics
• CPC primary: G01C11/18
• WIPO field: Medical technology
• WIPO sector: Instruments

Abstract

A method and a device for non-contact determination of temporal color and/or intensity variations in objects in a scene. Monoscopic overview images of the scene are detected with first and second overview cameras from two different viewing directions, and calculated to form a stereoscopic overview map. A two-dimensional detail image is detected by a detail camera from a third viewing direction and is projected on the overview map. Measurement surfaces in the scene are selected based on criteria which are predetermined depending on parameters on which conclusions are to be drawn from the color variations and/or intensity variations. Light emitted by the measurement surfaces is detected in a spatially-resolved and wavelength-resolved manner in a continuously-captured series of measurement images in a predetermined spectral range. The measurement surfaces are analyzed in the measurement images with respect to temporal variation of the intensity and/or color of the light, and the results displayed.