Baumer VisiLine, Руководство пользователя

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9.1.6 Look-Up-Table
The Look-Up-Table (LUT) is employed on Baumer VisiLine IP monochrome and color
cameras. It contains 2
12
(4096) values for the available levels. These values can be ad-
justed by the user.
9.1.7 Gamma Correction
With this feature, Baumer VisiLine IP cameras offer the possibility of compensating non-
linearity in the perception of light by the human eye.
For this correction, the corrected pixel intensity (Y') is calculated from the original intensity
of the sensor's pixel (Y
original
) and correction factor γ using the following formula (in over-
simplified version):
Y' = Y
original
γ
On Baumer VisiLine IP cameras the correction factor γ is adjustable from 0.001 to 2.
The values of the calculated intensities are entered into the Look-Up-Table (see 9.1.5).
Thereby previously existing values within the LUT will be overwritten.
Notice
If the LUT feature is disabled on the software side, the gamma correction feature is
disabled, too.
H
E 0
▲ Figure 15
Non-linear perception of
the human eye.
H - Perception of bright-
ness
E - Energy of light