A5073537472- Surface Roughness and Optical Measurements
- Color Science and Applications
- Color perception and design
- Optical measurement and interference techniques
- Calibration and Measurement Techniques
- Cultural Heritage Materials Analysis
- Industrial Vision Systems and Defect Detection
- Visual perception and processing mechanisms
- Music Technology and Sound Studies
- Photonic Crystals and Applications
- Occupational Health and Safety in Workplaces
- Advanced Measurement and Metrology Techniques
- Aesthetic Perception and Analysis
- Computer Graphics and Visualization Techniques
- Scientific Measurement and Uncertainty Evaluation
- Ocular and Laser Science Research
- Advanced Sensor Technologies Research
- Sensor Technology and Measurement Systems
- Advanced MEMS and NEMS Technologies
Conservatoire National des Arts et Métiers
2010-2020
KU Leuven
2016
Muséum national d'Histoire naturelle
2010
Centre National de la Recherche Scientifique
2010
In everyday life, the visual system is remarkably good at recognizing materials across a wide range of viewing conditions. This paper addresses problem identifying real samples from appearance. Here, we consider gloss as an appearance attribute that could reveal certain information about object properties. We prepared twelve glass and PMMA eroded these using different agents. The haze were measured 60 degrees via meter. For all samples, surface roughness properties measured. Microfacet...
Among the complete bidirectional reflectance distribution function (BRDF), visual gloss is principally related to physical reflection characteristics located around specular direction. This particular part of BRDF usually referred as peak. A good starting point for description could be measure properties this Unfortunately, such a characterization not trivial, since glossy surfaces width peak can become very narrow (typically full at half maximum inferior 0.5° encountered). In result, new...
Gloss is the second most relevant visual attribute of a surface beside its colour. While colour originates from wavelength repartition reflected light, gloss angular distribution. When an observer asked to evaluate surface, he always first orientate his eyes along specular direction before lightly tilting examined sample. This means that located in and around direction, peak called peak. On one hand, this flat broad on matte surfaces other it narrow sharp high surfaces. For late ones, FWHM...
In the European Joint Research Project 'Multidimensional Reflectometry for Industry', a new gloss scale was developed with aim to represent different levels of gloss, hue, roughness, and refractive indices. this paper, surfaces six selected samples were thoroughly investigated using various measuring techniques in order verify outcome novel manufacturing processes terms distinct as well types surface roughness. The evaluation capture structures wavelength intervals utilizing confocal...
The field of spectral radiance factor (SRF) measurements has seen growing interest in recent years. Scale conformity so far only been established between the national metrology institutes (NMIs) Germany and USA. This study aims at a bigger, multilateral scale comparison. For this purpose, total six NMIs participated comparison goniospectrophotometers based on neutral colored diffusely reflecting ceramics samples. In addition, two universities, providing home-built gonioreflectometer widely...
Abstract The visual sensation of gloss is built on cues deduced from the interaction between light, surfaces sunder evaluation, and surrounding conditions. Gloss a second‐order attribute appearance, this means that its perception not directly encoded biological sensors but constructed global scene in field view observer. It then complex quantity to measure. When most studies based simulated samples stress importance realistic observation conditions, we measure effect environment complexity...
When evaluating the gloss of a surface, observers always look in and around specular direction.Thus, peak contains information connected with gloss.In order to progress comprehension measurement gloss, it could be therefore useful study it.But this is narrow not all devices have proper optical settings access peak.Using dedicated goniospectrophotometer, we measured commercial scale samples varying from matt full glossy.From these traceable metrological measurements, clarified requested...
The present study focuses on the optical properties of functionalized surfaces and how surface geometry impacts them. Physical measurements reflected light are required to understand visual aspect such surfaces. Bidirectional Reflection Distribution Function (BRDF) is evaluated in order identify physical effects induced by different functionalization. BRDF high angular resolution allow us observe diffraction phenomenon at an unusual scale. Experimental results were compared theoretical...
Conventional gloss meters are generally used to measure specular gloss, also for curved surfaces despite their suitability flat artefacts only. In this study, three sample sets of a different level (glossy, satin and matt) were developed, consisting total 27 samples. Of each the was determined with devices: commercial handheld apparatus, reduced beam-size instrument an image-based device. Bidirectional reflectance distribution function measurements performed on 3 surfaces, serving as basis...