57
GlobeCaster
Swi t che r M anu al
Luma Keyer
A luma keyer is a key that electronically cuts a specific luminance value or range of
luminance values out of a video image and inserts another video source in that
hole. To set up a luma keyer, in the
Keyer Settings
panel select
Luma
as the
Key
Type
. This brings up the
Luma Keyer
panel (Figure 3.19)
.
Figure 3.19: Luma Keyer Panel
The settings work the same as those in the
Chroma Keyer
Panel, except for the
following differences:
Threshold
Replaces the
Hue
setting on the chroma panel. Used
only in manual mode, this slider adjusts the level of
brightness to be keyed out. Brightness values range
from 0 to 359.
Traditional
In this mode, the GlobeCaster keyer works like a
traditional keyer. You set a threshold value, and
everything above or everything below (depending
on whether you click the
Invert
button) this value is
keyed out. The other option is
Expanded
mode.
Expanded
In this mode, you can set a specific range of values
to be keyed out, and all other values, both higher
and lower, are retained. This enables you to set a
mid-range of luminance values to be removed. Use
the
Threshold
slider to select the approximate range
to key out, then use the
Width
slider to fine-tune
the size of that range (how wide a piece of the
luminance spectrum is keyed out). The other option
is
Traditional
mode.
Summary of Contents for GlobeCaster STUDIO 4000
Page 1: ...Switcher Manual ...
Page 4: ...ii Table of Contents ...
Page 5: ...CHAPTER 1 SWITCHER MANUAL DOCUMENT OVERVIEW ...
Page 6: ...2 ...
Page 11: ...CHAPTER 2 SWITCHER MANUAL QUICK START ...
Page 12: ...8 ...
Page 36: ...32 Chapter 2 Quick Start ...
Page 37: ...CHAPTER 3 SWITCHER MANUAL REFERENCE ...
Page 38: ...34 ...
Page 89: ...CHAPTER 4 SWITCHER MANUAL TUTORIALS ...
Page 90: ...86 ...
Page 111: ...SWITCHER MANUAL APPENDICES ...
Page 112: ...108 ...
Page 120: ...116 Appendix I Keyboard Commands ...
Page 125: ...SWITCHER MANUAL INDEX ...
Page 126: ...122 ...
Page 132: ...128 FCC Notice ...
Page 138: ...134 GlobeCaster System License Agreement ...
Page 144: ...140 Application Notes ...