Hand-Guided Single-Shot Multi-Line Triangulation | 3DIM Lab

Hand-Guided Single-Shot Multi-Line Triangulation

(Multi-) line triangulation systems deliver a nearly perfect 3D profile of the measured part for each projected line in single-shot. However, the number of projected lines is limited by physical and information theoretical restrictions, leading to low data densities. This research track introduces novel concepts to increase the data density of multi-line triangulation up to the physical and information-theoretical limit, leading to accurate and dense 3D models. Each model is captured in single-shot, which allows for “3D-videos” of fast-moving objects.

In a related concept dubbed “Flying Triangulation”, we pair a “sparse” single-shot line triangulation sensor projecting ~10 straight narrow lines with sophisticated real-time registration algorithms. The captured sparse 3D line profiles are registered to each other ‘on-the-fly’ while the sensor is free-hand guided around the object, or the object is moved in front of the sensor (see videos). The result is a dense 3D model of the object with high depth precision.

Visit the Osmin3D YouTube channel for more Videos.

Color 3D Movie of a talking face - RAW data (no post processing)

Color 3D Movie of another talking face - RAW data (no post processing)

Real-time 3D movie of a boncing ping-pong ball - RAW data (no post processing)

Real-time 3D movie of a folded paper - RAW data (no post processing). High object frequencies are preserved

How to watch a ‘3D movie’

3D movie of a talking face with unidirectional lines plus closeup - RAW data (no post processing).

3D movie of a talking face with unidirectional lines - RAW data (no post processing).

Optics Express title image (OE 25(19), 2017)

OSA image of the week October 2017

Flying Triangulation Dental Scanner

Flying Triangulation Face Scanner

3D models measured with Flying Triangulation (no post processing).

360° scan of a plaster bust.

Interview Flying Triangulation (March 2013)
German with english subtitles

Selected Publications

Single-Shot 3D Sensing Close to Physical Limits and Information Limits.

Florian Willomitzer

Dissertation, University Erlangen-Nuremberg, Published as book in the series “Springer Theses” in 2019, 2017.

Single-shot 3D motion picture camera with a dense point cloud.

Florian Willomitzer, Gerd Häusler

Optics Express, 2017.

Single-shot three-dimensional sensing with improved data density.

Florian Willomitzer, Svenja Ettl, Christian Faber, Gerd Häusler

Applied Optics, 2015.

Flying triangulation-A motion-robust optical 3D sensor for the real-time shape acquisition of complex objects.

Florian Willomitzer, Svenja Ettl, Oliver Arold, Gerd Häusler

AIP Conference Proceedings, 2013.

Hand-guided 3D surface acquisition by combining simple light sectioning with real-time algorithms.

Oliver Arold, Svenja Ettl, Florian Willomitzer, Gerd Häusler

arXiv preprint, 2014.