2024
conference-paper
OpenAlex
Emma Le Francois, Haochang Chen, Steven Hancock, Jack Ward Thomas
Current satellite lidars have sparse spatial coverage which is prohibitive for many applications requiring continuous coverage. These use solid-state lasers which are bulky and have a low efficiency. Emerging high power and high brightness diode laser technology alongside single photon detectors provide …
gb
(code pays fourni par la source)
Accès ouvert
2021
article
OpenAlex
Emma Le Francois, Alexander D. Griffiths, Jonathan J. D. McKendry, Haochang Chen et autres
Time of flight and photometric stereo are two three-dimensional (3D) imaging techniques with complementary properties, where the former can achieve depth accuracy in discontinuous scenes, and the latter can reconstruct surfaces of objects with fine depth details and high spatial resolution. In …
gb
(code pays fourni par la source)
Accès ouvert
2020
article
OpenAlex
Emma Le Francois, Johannes Herrnsdorf, Jonathan J. D. McKendry, Laurence Broadbent et autres
Three dimensional reconstruction of objects using a top-down illumination photometric stereo imaging setup and a hand-held mobile phone device is demonstrated. By employing binary encoded modulation of white light-emitting diodes for scene illumination, this method is compatible with standard lighting infrastructure and …
us
(code pays fourni par la source)
2020
conference-paper
OpenAlex
Emma Le Francois, Johannes Herrnsdorf, Jonathan J. D. McKendry, Laurence Broadbent et autres
3D reconstruction of objects can be achieved using both time of flight and photometric stereo imaging using four modulated white LEDs, a SPAD camera and a mobile phone. The standard deviation for the reconstruction is 4.1 mm at a distance of 70 …
gb
(code pays fourni par la source)
2019
conference-paper
OpenAlex
Emma Le Francois, Johannes Herrnsdorf, Laurence Broadbent, Martin D. Dawson et autres
3D reconstruction of objects can be achieved using a top-down illumination, photometric stereo imaging configuration with four modulated white LEDs and a mobile phone. The Standard deviation for the reconstruction is ranging from 3.5% to 10.4%.
gb
(code pays fourni par la source)