Illustrating The Influence Of Gld Correction; Gld: Response Curve - Barco R92112011 User Manual

Applying a correction in a certain zone also influences the adjacent zones.
The hierarchical levels are selected in a way that the first hierarchy level influences the entire transition from black to white (0% to
100%) with the main correction done at 25%. Below you can find the table of the hierarchy levels and their influence zone.
Hierarchy level (value 1–4)
1
2
3
4
The % values in the table indicate measurable brightness on the screen.
7.8.11.2 Illustrating the influence of GLD correction
Illustrating GLD correction
Without performing GLD correction, we have a linear response
graph below, where we the horizontal axis represents the signal strength (0% to 100%) and the vertical axis the intensity.
Intensity
1024
512
0
0
Image 7-168

GLD: response curve

The following topics give you an overview of the outcome of the GLD corrections done at different levels.
1. To be fully correct, we will have the gamma response curve instead of a linear response curve. In this explanation, we consider it to be linear however.
R59770066 SIM 7Q SERIES 08/12/2014
Hierarchy level (%)
25.0%
6.3%
56.3%
1.6%
14.1%
39.1%
76.6%
0.4%
3.5%
9.8%
19.1%
31.6%
47.3%
66.0%
87.9%
Linear response
25% 50%
Gray level range
0.0% - 100.0%
0.0% - 25.0%
25.0% - 100.0%
0.0% - 6.3%
3.6% - 25.0%
25.0% - 56.3%
56.3% -100.0%
0.0% - 1.6%
1.6% - 6.3%
6.3% - 14.1%
14.1% - 25.0%
25.0% - 39.1%
39.1% - 56.3%
56.3% - 76.6%
76.6% - 100.0%
1
from black to white. This is shown as a green dashed line in the
75% 100%
7. Advanced
Signal
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