Manuel Hofer

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We present a novel Yb:KGd(WO 4) 2 oscillator design that generates six beams of temporally delayed, 253 fs, 11 nJ pulses. This allows multifocal nonlinear microscopy to be performed without the need for complicated optical multiplexers. We demonstrate our design with twelve simultaneously acquired two-photon, second-harmonic and/or third-harmonic images(More)
Generating accurate 3D models of man-made objects and urban scenery from an image sequence is a challenging task. Traditional Structure-from-Motion (SfM) approaches often fail because of the high amount of untex-tured objects and wiry structures present. At the very least, these objects are poorly represented in the resulting point clouds. Since most(More)
Man-made environments contain many weakly textured surfaces which are typically poorly modeled in sparse point reconstructions. Most notable , wiry structures such as fences, scaffolds, or power pylons are not contained at all. This paper presents a novel approach for generating line-based 3D models from image sequences. Initially, camera positions are(More)
1 Motivation Recovering 3D information from a single moving camera is a widely studied field in the area of computer vision (e.g. [1]). Most of these Structure-from-Motion (SfM) approaches are based on so-called interest points (e.g. corners) in images, which can be accurately matched using powerful de-scriptors like SIFT [7]. Hence the output is usually a(More)
Traditional Structure-from-Motion (SfM) approaches work well for richly textured scenes with a high number of distinctive feature points. Since man-made environments often contain textureless objects, the resulting point cloud suffers from a low density in corresponding scene parts. The missing 3D information heavily affects all kinds of subsequent(More)
The reversible phosphorylation of proteins on serine, threonine, and tyrosine residues is an important biological regulatory mechanism. In the context of genome integrity, signaling cascades driven by phosphorylation are crucial for the coordination and regulation of DNA repair. The two serine/threonine protein kinases ataxia telangiectasia-mutated (ATM)(More)
Extracting 3D information from a moving camera is traditionally based on interest point detection and matching. This is especially challenging in the built environment, where the number of distinctive interest points is naturally limited. While common Structure-from-Motion (SfM) approaches usually manage to obtain the correct camera poses, the number of(More)
Generating accurate 3D models for man-made environments can be a challenging task due to the presence of texture-less objects or wiry structures. Since traditional point-based 3D reconstruction approaches may fail to integrate these structures into the resulting point cloud, a different feature representation is necessary. We present a novel approach which(More)
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