OCCHIO ZEPHYR ESR C
Based on a combination of mechanical dispersion and gravity phenomena, the Occhio Zephyr ESR-C
provides a fast and accurate size and shape analysis of sieveable powders.
The instrument combines a high quality imaging system with a robust mechanical design, achieving quality
and production control requirement.
Color characterization
To determine the color of the coffee particles, we employed the luminance parameter. This
parameter represents the average value of the three signals (red, green, and blue) captured by the
camera during image acquisition. The dispersed particles were allowed to pass through the image
region, while a reflection lighting system enabled their acquisition. The Armadillo software then
computed the luminance value of each particle in real time.
Darker particles resulted in lower luminance parameter values, while clear particles produced higher
values. The luminance distribution was utilized to identify how the luminance varied with respect to
the total volume of the sample.
