Search Results for author: Mengkun She

Found 9 papers, 1 papers with code

Refractive COLMAP: Refractive Structure-from-Motion Revisited

no code implementations13 Mar 2024 Mengkun She, Felix Seegräber, David Nakath, Kevin Köser

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-port underwater housings).

3D Reconstruction

Visual Tomography: Physically Faithful Volumetric Models of Partially Translucent Objects

no code implementations21 Dec 2023 David Nakath, Xiangyu Weng, Mengkun She, Kevin Köser

We additionally suggest a method to convert non-physical NeRF media into a physically-based volumetric grid for initialization and illustrate the usefulness of the approach using two real-world plankton validation sets, the lab-scanned models being finally also relighted and virtually submerged in a scenario with augmented medium and illumination conditions.

3D Reconstruction

Advanced Underwater Image Restoration in Complex Illumination Conditions

no code implementations5 Sep 2023 YiFan Song, Mengkun She, Kevin Köser

To validate the effectiveness of our approach, we conducted extensive experiments on simulated and real-world datasets.

Underwater Image Restoration

Efficient Large-scale AUV-based Visual Seafloor Mapping

no code implementations11 Aug 2023 Mengkun She, YiFan Song, David Nakath, Kevin Köser

Driven by the increasing number of marine data science applications, there is a growing interest in surveying and exploring the vast, uncharted terrain of the deep sea with robotic platforms.

3D Reconstruction

Investigation of the Challenges of Underwater-Visual-Monocular-SLAM

no code implementations14 Jun 2023 Michele Grimaldi, David Nakath, Mengkun She, Kevin Köser

A focus is laid on understanding the impact of environmental conditions, such as optical properties of the water and illumination scenarios, on the performance of monocular vSLAM methods.

Image Enhancement Image Restoration +1

Marine Bubble Flow Quantification Using Wide-Baseline Stereo Photogrammetry

no code implementations14 Dec 2021 Mengkun She, Tim Weiß, YiFan Song, Peter Urban, Jens Greinert, Kevin Köser

Beside reporting the steps to make bubble characterization robust and autonomous, we carefully evaluate the reachable accuracy to be in the range of 1-2\% of the bubble radius and propose a novel auto-calibration procedure that, due to the lack of point correspondences, uses only the silhouettes of bubbles.

Refractive Geometry for Underwater Domes

no code implementations14 Aug 2021 Mengkun She, David Nakath, YiFan Song, Kevin Köser

Underwater cameras are typically placed behind glass windows to protect them from the water.

Deep Sea Robotic Imaging Simulator

1 code implementation27 Jun 2020 Yi-Fan Song, David Nakath, Mengkun She, Furkan Elibol, Kevin Köser

Nowadays underwater vision systems are being widely applied in ocean research.

Light Pose Calibration for Camera-light Vision Systems

no code implementations27 Jun 2020 Yi-Fan Song, Furkan Elibol, Mengkun She, David Nakath, Kevin Köser

Illuminating a scene with artificial light is a prerequisite for seeing in dark environments.

Pose Estimation

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