The Software Concept
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3.4.3.3
Setting for Automated Applications
Automated applications usually require stable lighting and therefore
manual parameter settings (
see dialog in section 2.5.4
).
Shutter
and
Gain:
Keep the Gain setting as low as possible and the
Shutter setting as high as possible, since Gain not only amplifies the
image signal but also the noise.
High Shutter values (longer exposure times) can result in motion blur.
Determine through calculation or experimentation the highest sensible
value and then set the Gain to achive the optimal picture brightness.
If necessary adjust the lens aperture to improve the picture.
Brightness:
Keep the brightness as low as possible. This guarantees
the highest gray value dynamic.
Sharpness:
Adjust the image sharpness to the level you desire. In
automated applications you should try to set the sharpness to the
lowest possible value to avoid noise.
Before adjusting the sharpness setting, be sure that the focus and
aperture (sharpness depth) settings on the lens are optimized.
Since the sharpness function cannot compensate for a low quality lens,
you should be sure to use a lens that is suitable for your application.
Gamma:
With some automated applications a linear brightness
characteristic may be desired. In this case the Gamma correction
should be deactivated.
Usually the Gamma correction should be set so that the picture output
is optimized for the application in question.
Therefore with applications that involve object recognition it makes
sense to work with the Gamma correction switched on.
