Co-design methods generally model the influence of the optical parameters only on the point spread function of the system without considering changes in light intensity that modify the signal to noise ratio of the digitized image. We include multiple noise sources in a model of imaging sensors intended for the co-design of an optical system and a n...
Co-design methods have been introduced to jointly optimize various optical systems along with neural network processing. In the literature, the aperture is generally a fixed parameter although it controls an important trade-off between the depth of focus, the dynamic range, and the noise level in an image. In contrast, we include aperture in co-des...
We present a differential absorption lidar based on a single-frequency parametric source operating at 2 μm which was used for range-resolved measurements of the stable water isotopologues H$_2$ $^{16}$O and HD $^{16}$O.
A 1 Tbit/s 53km single channel free-space optical (FSO) link is demonstrated. High bandwidth, high order modulation formats and advanced adaptive optics are utilized. We show that the absence of a nonlinear-Shannon limit in combination with adaptive optics enables record data-transmission with low link failures.
This paper aims to experimentally evaluate a simplified vision-based method for structural health monitoring (SHM). Contrary to conventional solutions that rely on extracting motions through image processing, this paper proposes to conduct the SHM analysis by the direct processing of pixel brightness without extracting the motion signals beforehand...
Published in Sensors (Basel, Switzerland)
In this paper, we study the strain transfer mechanism between a host material and an optical fiber. A new analytical model handling imperfect bonding between layers is proposed. A general expression of the crack-induced strain transfer from fractured concrete material to optical fiber is established in the case of a multilayer system. This new stra...
ACIVS 2020, 20th International Conference on Advanced Concepts for Intelligent Vision Systems, Auckland, NOUVELLE-ZELANDE, 10-/02/2020 - 14/02/2020
Visible Light Communication (VLC) relies on the dual use of existing light infrastructure for wirelessly send data. VLC is regarded as a ?green?, cost-effective and secure communication technology. Moreover, VLC has been always considered immune to Radio Frequency (RF) waves. The only type of interference that has always been included in the channe...
Temperature estimation through infrared thermography is facing the lack of knowledge of the observed material's emissivity. The derivation of the physical equations lead to an ill-posed problem. A new Kriged Interacting Particle Kalman Filter is proposed. A state space model relates the measurements to the temperature and the Kalman filter equation...
