SICK Ranger3

Figure 26: Wooden board displayed with reflectance (left) and scatter (right). The knots and the
blue-stained right edge of the board (denoted in blue) appear dark in the scatter image.
Since the laser line spreads differently in different material, scatter measurements can
distinguish material effects, which is useful for organic matters such as wood (wood
fibers transmit light along their growth direction, and knots and rot affect this property)
and meat (fat, bone, and meat have different scattering properties). In some cases,
scattering can reveal sub-surface effects like delamination or the content of cavities
beneath a surface.
The default pixel format for scatter is 16 bits. This is due to the large dynamic range of
the scatter signal, which sums up to 29 individual 8-bit pixel values.
Basic scatter parameters
The scatter component measures the amount of light received in a defined sampling
window, which is part of the extracted 31-row WAM window. The amount of light is
added for all rows in the sampling window to get the total scattering value.
Select the Scatter checkbox to add scatter data to the image data. The sampling window
is defined by the following parameters:
Setting Description
Scatter offset The distance (number of pixels) from the laser peak position to the
row where the first scatter measurement is made. The offset can
be set to 0, which means the center (reflectance) pixel is included
and that an odd number of rows is used for summing the scatter
data.
Scatter width The number of rows to sum scatter data from.
Scatter pixel format The number of bits in the scatter data. It represents all the infor‐
mation provided by PixelSize and PixelColorFilter in a single feature.
The default pixel format is 16 bits. Possible to select Mono8 and
Mono16.
figure 27 illustrates two cases of symmetric sampling, with low scatter to the left and
high scatter to the right. The Scatter offset and Scatter width are denoted in the figure.
CONFIGURATION 8
8020774/1D7Q/2022-03 | SICK O P E R A T I N G I N S T R U C T I O N S | Ranger3
41
Subject to change without notice