Vidikron Vision 150 User Manual

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Vision Model 140/150 Installation/Operation Manual
PRE
L
IMINAR
Y
• Clipping Detector: The Clipping Detector is a tool to assist with defining individual input 
levels, enabling you to accurately set the white balance for any particular source with the 
appropriate image. 
Enabling the Clipping Detector activates a special operating mode for detecting only 
pixels that are considered black or white; all other levels are displayed as a mid-level gray. 
When used with a smooth grayscale pattern in which black and white are known to be at 
opposite edges of the image, you can watch these isolated areas while adjusting 
individual black and white levels until both black and white edges are just visible and 
distinguished from neighboring pixels. Images from this source will then display correct 
blacks and whites without crushing. 
Figure 3-21. Adjusting Black Levels and White Levels Using the Clipping Detector
1.
Display a 16-level grayscale test pattern from the VHD Controller. 
2.
Enter a checkmark in the Clipping Detector checkbox. 
 
3.
Display one primary color. 
 
4.
For the current color, adjust its corresponding “Black Level” slidebar just until a single 
band of black appears at one edge of the screen. This band represents the first band of 
the grayscale pattern, which should be 100% black. Do not adjust too far. 
5.
With the same color still active, adjust its corresponding “White Level” slidebar just until 
a single band of color appears at the opposite edge of the screen. This band represents 
the last band of the grayscale pattern, which should be 100% white (or the current color, 
if a certain color is enabled). Do not adjust too far. 
The Clipping Detector will initially render the grayscale as a uniform gray 
field before adjustment or extreme crushing.
Selecting Auto Color Enable ensures that the correct color is displayed for 
each setting.
4.  Adjust corresponding
     black level (red, green or 
     or blue) until one black 
     band appears.
 
5.  Adjust corresponding
     white level (red, green or 
     or blue) until one bright 
     band appears. 
3.  Choose one primary
     color at a time. 
1. Pre 
Calibration
2. Red 
Black 
Level 
256
3. Red 
White 
Level 
256
4. Green 
Black 
Level 
256
5. Green 
White 
Level 
256
6. Blue 
Black 
Level 
256
7. Blue 
White 
Level 
256
8. 
Auto Color Enable
9. 
Clamping Back 
Porch
0. 
Clipping Detector
 
Color Enable  Red
White Balance
Note