Significance: Monitoring oxygen saturation (SpO2) is important in healthcare, especially for diagnosing and managing pulmonary diseases. Non-contact approaches broaden the potential applications of SpO2 measurement by better hygiene, comfort, and capability for long-term monitoring. However, existing…
Die vorliegende Arbeit zielt auf eine Kombination der bildgebenden 3D-Technik mit der multispektralen Bilderfassung. Diese Technologiefusion kann in zwei Varianten unterteilt werden: 1. Multispektral-3D-Bildgebung: Pixelgetreue Erfassung der 3D-Form der Oberfläche und deren spektral aufgelösten optischen…
Obstructive sleep apnea (OSA) is a common sleep-related breathing disorder characterized by the collapse of the upper airway and associated with various diseases. For clinical diagnosis, a patient’s sleep is recorded during the night via polysomnography (PSG) and evaluated the next day regarding nocturnal…
The contactless estimation of vital signs using conventional color cameras and ambient light can be affected by motion artifacts and changes in ambient light. On both these problems, a multimodal 3D imaging system with an irritation-free controlled illumination was developed in this work. In this system,…
This work presents a suitable solution to get innervolumetric 3-dimensional data of an Additive Manufacturing (AM) process. The necessary image capturing and generating of singlelayer pointclouds is presented. The subsequent pointcloud composition to an objectpointcloud is also explained. The sensor…
Shading effects induced by illumination and local object surface orientation could strongly deteriorate the accuracy of colour imaging. Therefore, a shading correction is needed for high colour fidelity. In this work a 3D model based inverse rendering approach is proposed for a narrowband multispectral…
Abstract The correction of inter-channel image distortions in multispectral imaging is the key process for high-precision applications. In this work, image distortion in a special filter wheel camera with sensor actuation based focus adjustment is investigated. Based on the analysis of the optical path,…
Abstract The improvement of image quality in the infrared range on silicon-based sensors is one major topics using these long wavelength channels for geometric measurements. The reason behind the bad quality of infrared images in comparison with the visible sampling range is explained by the wavelength…