Reference Manual Chapter 2
Ranger E/D
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Overview
Color Components
The Color components are used for measuring the red, green and blue wavelength content
of the light reflected from the object. They can be used for inspecting color properties, for
example to detect discolorations or to sort colored objects.
The Color components are only available on the ColorRanger models, which are equipped
with a sensor where some of the rows are coated with a red, green, or blue filter. The filter
layout is described in 9 “Hardware Description”.
There are two different color components:
Color Measures reflected light along three color filtered rows on the sensor.
HiRes Color Available in the ColorRanger E55. Uses special rows on the sensor that
contains twice as many pixels as the rest of the sensor (3072 pixels
versus 1536 pixels). The profiles delivered by the HiRes Color compo-
nent therefore have twice the resolution compared with the ordinary
Color component.
Figure 2.8 – Grayscale (left) and color (right) images of candy. The color image makes it
possible to differentiate between the colors, for example for counting or sort-
ing.
The Color components make measurements in three different regions on the sensor
simultaneously. The data is delivered as separate color channels – one channel for each
sensor area. The color channels can then be merged into high quality color images on the
PC by using the APIs in the Ranger development software.
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