Godefroid Dislaire

• University of Liège

The conception of a prototype combining two hyperspectral cameras, one ranging from visible to near-infrared and the other covering short-wave infrared, is presented. The prototype aims at the characterization of millimeter-sized metallic alloys particles, originating from end-of-life vehicles and waste electrical and electronic equipment recycling...

This paper presents the considerations taken during the conception of a prototype combining two hyperspectral cameras (VNIR and SWIR), dedicated to the characterization of metallic alloys fine-sized particles, coming from end-of-life vehicles and electric and electronic equipment wastes, as well as the calibration steps necessary to obtain quality...

This paper highlights the fact that particle size distribution (PSD) is not unique for the same product, and is dependent on the chosen measurement technique, especially for asymmetric shapes. Laser diffraction and 2D image analysis are commonly used PSD measurement techniques. However, the results may not be representative of the true physical dim...

Since the early seventies high chromite and low base metal sulphide (BMS) contents of the UG2 reef imposes technological challenges to mineral processors and extractive metallurgists. Forty years later, particle size distribution and size by size mineralogy are considered as key factors to the continuous improvement of the UG-2 ore metallurgy. With...

Early Devonian miospore assemblages from Saudi Arabia include notably two well-differentiated taxa. All the intermediary forms between them co-occur in the spore assemblages. The stratigraphic change and the progressive replacement of simpler morphotypes by more complex ones seem to indicate a phylogenetic link between these different varieties. Im...

In this paper, the monitoring of the composting process with an e-nose is presented. An emission chamber is developed for this purpose and put on a household waste compost pile. A lab-made e-nose with metal oxide sensors is located at the exit of this chamber. Simultaneously to the e-nose measurements, air sampling on sorbent tubes as well as physi...

Image analysis suffers from the obsession of many users to attempt processing images in the same way as the human visual system acts. This is particularly true when considering the determination of an average grain size in materials. Whereas the human eye easily outlines individual grains in an image, it may become a real puzzle for an automatic im...

1. Abstract This paper explores the estimation error of size and shape parameters computed from binary digital images of individual particles. The influence of sampling density (magnification), translation and rotation of the discrete grid is studied using simulated images of geometric and natural particles. These results are intended to serve as a...

Marble texture classification is an error prone undertaking when performed by humans. There- fore normalized methods are needed in order to obtain reproducible results. Technological advances in digital image acquisition and computing allows for the building of systems based on such methods. The classification will be represented here by dyadic sca...

The growing success of image analysis based instruments for particle characterization demonstrates the importance of size and shape analysis in operations involving particulate materials. ISO norms for particle sizing using image analysis are being elaborated to clarify nomenclature and measurement principles. But despite this, there is still a lac...