Filter
Top Products
42
Vidikron Vision Model 50 Owner’s Operating Manual
On-Screen Display Menus
White Balance
Gamma Selection
ICC Adjust
Gain: Use the Gain controls in the White Balance sub-menu to correct color imbalances
in the bright areas of the image. A good way to do this is to use a test pattern consisting
mostly of solid white areas, such as an 80 IRE “window” pattern. If the white areas contain
traces of red, green or blue, decrease the Gain for that color.
Offset: Use the Offset controls in the White Balance sub-menu to correct color imbalances
in the dark areas of the image. A good way to do this is to use a test pattern consisting
mostly of dark gray areas, such as a 30 IRE “window” pattern. If the gray areas contain traces
of red, green or blue, decrease the Offset for that color.
Gamma: “Gamma” is a global setting that determines how gray shades are displayed
between minimum input (black) and maximum input (white) for all signals. A good gamma
setting helps to optimize blacks and whites while ensuring smooth transitions for the “in-
between” values utilized in other grays. Unlike “Brightness” and “Contrast” controls, the
overall tone of your images can be lightened or darkened without changing the extremes
and all images will be more vibrant while still showing good detail in dark areas when
using the “Gamma” control.
In all but the most unusual situations, the appropriate “Gamma Selection” (see below) will
produce accurate colors and a satisfying contrast level. However, it is sometimes necessary
to adjust the red, blue and green gamma curves individually. To do this, select Gamma
from the White Balance sub-menu and use the left- and right-arrow buttons to manipulate
the on-screen slidebars.
Save Color Temp.4/Save Color Temp.5: When you are finished adjusting the Gamma, Gain
and Offset, select Save Color Temp.4 or Save Color Temp.5 to store your settings. To recall
them, set the Color Temperature to +4 or +5 in the Picture Adjust menu (refer to “Picture
Quality Adjustments,” earlier in this section).
The default gamma setting of 2.2 is correct for almost all signals and conditions. If excess
ambient light washes out the image and it becomes difficult or impossible to see details
in dark areas, lower the gamma setting to compensate. This will improve contrast while
maintaining good details for blacks. Conversely, if the image is washed out and unnatural,
with excessive detail in black areas, increase the setting. Again, good gamma improves
contrast while maintaining good details for blacks and whites.
Use the ICC Adjust controls to customize the stored NTSC, HDTV and/or PAL color select
characteristics. To do this, select the color select to modify. Then, select a component color
(Red, Green, Blue, Yellow, Cyan or Magenta).
For each component color, you can adjust the following:
Intensity: This slidebar adjusts the intensity -- also known as luminance -- of a given
color.
Sat.: This slidebar adjusts the color saturation level -- the amount of that color in a video
image. Lower settings produce less saturated colors; a setting of “0” removes that color
from the image entirely. If the saturation is too high, that color will be overpowering and
unrealistic.
Hue: This slidebar adjusts the red/green color hue for true color reproduction of video
signals. For best results, adjust tint while displaying an external color bars test pattern.
Otherwise, it is recommended that Hue remain at its default setting.
When you have finished customizing the color select, select Store Setting and press
ENTER.