VWC-44
31
13.5.2 [Gamma]: Color correction in edge blending area
a
、
Different projectors may have different gamma curve. Different “Display mode” in the same
projector will also have different gamma curves. These gamma curves will affect the final video
result in edge blending area. The common issues are gray or color banding effect. These issues
are more significant in pure color or white back ground display.
b
、
[Gamma] is to select the right gamma curve for edge blending area and [Offset] compensation
area.
c
、
If color difference in the projectors, user need to adjust the color difference in the projectors to
reduce the possible banding effect in edge blending area due to color different among projectors.
d
、
[Gamma] function is not functional when [Edge] setting is not executed.
User needs to select correct edge for edge
blending.
For 3 projector edge blending as example:
To select [Left Edge] for RH projector
To select [Right Edge] for LH projector
To select both [Right Edge] & [Left
Edge] for center projector.
Two sub-menu under [Gamma]:
[Transition]: To set edge blending area
gamma value. User can see image
color change in edge blending area
real time to get the best quality.
[Gain]: To fine tune the gamma curve
in edge blending area in each channel
near the center point of gamma curve.
It can further improve edge blending
result, especially while two adjacent
projectors has different gamma curve.
[Offset] gamma: To prevent black level
Offset adjustment from affecting
normal image brightness while
executing black level uplift. It will
determine the control curve in offset
adjustment. Basically, offset
adjustment is to adjust the color at low
brightness level only. It is related to the
