Ulf-Dietrich Braumann

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The analysis of the three-dimensional (3-D) structure of tumoral invasion fronts of carcinoma of the uterine cervix is the prerequisite for understanding their architectural-functional relationship. The variation range of the invasion patterns known so far reaches from a smooth tumor-host boundary surface to more diffusely spreading patterns, which all are(More)
Recently there is an increasing interest in video based interface techniques, allowing more natural interaction between users and systems than common interface devices do. Here, we present a neural architecture for user localisa-tion, embedded within a complex system for visually-based human-machine-interaction (HMI). User's localisation is an absolute(More)
We present a neural architecture for gesture-based interaction between a mobile robot and human users. One crucial problem for natural interface techniques is the robustness under highly varying environmental conditions. Therefore, we propose a multiple cue approach for the localisation of a potential user in the operation eld, followed by the aquisition(More)
The goal of nonparametric image registration lies in the solution of highly nonlinear partial differential equations. We present a new partial differential equation for the nonlinear image registration that can be used for the registration of images with textured and complex shaped motifs. The new equation allows to control the vortex structure in the(More)
The focus of many non-parametric image registration algorithms lies on the solution of non-linear partial differential equations. We offer a simple solution procedure therefor based on discrete Fourier transform. Boundary conditions can strongly influence the result of the registration. The issue is investigated on the example of non-linear curvature-based(More)
We have focused our interest on the registration of brightfield transmitted light microscopy images with respect to different histological stainings. For this kind of registration problem we have developed a new segmentation procedure. Based on the obtained consistent segmentations, a nonlinear registration transformation is computed. The applied(More)
| We present a neural network architecture for gesture-based interaction between a mobile robot and its user, thereby spanning a bridge from the localisation of the user over the recognition of its gestural instruction to the generation of the appropriate robot behavior. Since this system is applied under real-world conditions, especially concerning the(More)
Astroglial cells in the central nervous system (CNS) are able to change their morphology and shape after different kinds of stimuli. We have developed a method for the structural description of astrocytes based on their representation as undirected simple graphs. The underlying image processing chain and the algorithm for the graph construction are(More)
In this short note we briefly introduce a newly developed image processing chain for a 3D reconstruction of serially sectioned tissue specimens. Provided a stack of digitised transmitted light microscope colour images of cervical tissue specimens, the procedure finally results in a 3D quantification and visualisation of the tumour invasion front of the(More)