Phytec FireWire-CAM-001, Руководство пользователя

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FireWire-CAM-001 / 002
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PHYTEC Meßtechnik GmbH 2005 L-661e_1
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Silhouette Projection
This method is very useful if you are only interested in the outline of a
flat object (e.g. for measurement purposes).
It generates high contrast pictures and is not dependent on the surface
of the object.
With the silhouette projection the object is placed before a
luminescent plate. It is a diffuse lighting surface that lights the object
from below. The camera is pointed at the object from the front, i.e.
toward the light source (Figure 43).
The result is a grayscale image. The bright pixels are the background,
the dark pixels are the object.
Figure 43: The Silhoutte Projection