Christie Roadster S+12K User Manual page 111

Roadster & Mirage S+/HD User Manual
020-100002-04 Rev. 1 (12-2008)
Optional Blinders
If desired, you may wish to install the optional mechanical blinders at the projector
lens. These adjustable blades help to blend blacklevels along edges of the image, and
are available in a separate kit.
Since the blinders and Edge Blending menu controls are intended to complement
each other, with blinders primarily affecting blacklevels and software primarily
affecting whitelevels, together these components produce the best blends possible for
any type of flat image. Or, depending on your projector model and your application
needs, you may prefer to utilize only the standard software controls—for example,
you may find that the edges of white or very light images can be well-blended
without blinders. In other more unusual applications with only a very small area of
overlap, you may need only the blinders.
Standard edge blending software controls are located in the two-page Edge Blending
submenu access via Configuration menu, then Geometry and Color submenu, then
Edge Blending. The More option opens the second page of the Edge Blending
submenu.
Main Functions
Use standard edge blending controls to set the precise width, shape and midpoint you
need to blend overlapping edges together smoothly.
•
determines how much area is used for blending along an overlapping
Blend Width
edge. Slidebar values represent the number of eight-pixel steps used for the
blend. For example, a setting of "3" creates a blended edge 24 pixels wide. A
setting of "0" signifies no blending. For best results in most applications, use a
blend width of 16-48 steps (128-384 pixels).
•
Ranges: 0-80 horizontal, 0-60 vertical.
•
determines the rate of
Blend Shape
roll-off across the blend width, i.e.
how quickly the white levels across
the blend change from light and dark.
Increasing the Blend Shape setting
accelerates the rate of change at both
extremes so that less of the region
appears mid-gray (see Figure 3. 35).
Decreasing the Blend Shape setting
slows the rate of change so that more
of the region appears mid-gray. For
most applications, this subtle control
is best left close to 50.
Figure 3. 35. "Shape" Examples
Operation
3-69