35 citations · 93 across the 10 of their papers we have counts for
11 papers
BlobBoards: Robust Markers for Accurate Pose
James Pritts, Till Sittart, Hendrik Sauer +4
We propose BlobBoards, a fiducial marker system comprising a dense, multi-scale field of Gaussian blobs and a feature-based pipeline for joint detection, identification, and pose e…
A Calibration Tool for Refractive Underwater Vision
Felix Seegräber, Mengkun She, Felix Woelk +1
Many underwater applications rely on vision sensors and require proper camera calibration, i.e. knowing the incoming light ray for each pixel in the image. While for the ideal pinh…
Refractive COLMAP: Refractive Structure-from-Motion Revisited
Mengkun She, Felix Seegräber, David Nakath +1
In this paper, we present a complete refractive Structure-from-Motion (RSfM) framework for underwater 3D reconstruction using refractive camera setups (for both, flat- and dome-por…
Visual Tomography: Physically Faithful Volumetric Models of Partially Translucent Objects
David Nakath, Xiangyu Weng, Mengkun She +1
When created faithfully from real-world data, Digital 3D representations of objects can be useful for human or computer-assisted analysis. Such models can also serve for generating…
Advanced Underwater Image Restoration in Complex Illumination Conditions
Yifan Song, Mengkun She, Kevin Köser
Underwater image restoration has been a challenging problem for decades since the advent of underwater photography. Most solutions focus on shallow water scenarios, where the scene…
Semihierarchical Reconstruction and Weak-area Revisiting for Robotic Visual Seafloor Mapping
Mengkun She, Yifan Song, David Nakath +1
Despite impressive results achieved by many on-land visual mapping algorithms in the recent decades, transferring these methods from land to the deep sea remains a challenge due to…
Investigation of the Challenges of Underwater-Visual-Monocular-SLAM
Michele Grimaldi, David Nakath, Mengkun She +1
In this paper, we present a comprehensive investigation of the challenges of Monocular Visual Simultaneous Localization and Mapping (vSLAM) methods for underwater robots. While sig…
Design, Implementation and Evaluation of an External Pose-Tracking System for Underwater Cameras
Birger Winkel, David Nakath, Felix Woelk +1
In order to advance underwater computer vision and robotics from lab environments and clear water scenarios to the deep dark ocean or murky coastal waters, representative benchmark…
Marine Bubble Flow Quantification Using Wide-Baseline Stereo Photogrammetry
Mengkun She, Tim Weiß, Yifan Song +3
Reliable quantification of natural and anthropogenic gas release (e.g.\ CO, methane) from the seafloor into the water column, and potentially to the atmosphere, is a challengin…
Refractive Geometry for Underwater Domes
Mengkun She, David Nakath, Yifan Song +1
Underwater cameras are typically placed behind glass windows to protect them from the water. Spherical glass, a dome port, is well suited for high water pressures at great depth, a…
Deep Sea Robotic Imaging Simulator
Yifan Song, David Nakath, Mengkun She +2
Nowadays underwater vision systems are being widely applied in ocean research. However, the largest portion of the ocean - the deep sea - still remains mostly unexplored. Only rela…