EVS EPSIO Version 1.63 - May 2011 User's Manual - Manual (Page 45)

Epsio Version 1.63 – User’s Manual
EVS Broadcast Equipment – May 2011
Issue 1.63.C
39
2.4 CONFIGURING THE CHROMA KEY
2.4.1 G
ENERAL
I
NFORMATION
C
ONCEPT OF
C
HROMA
K
EY
The chroma keying is a technique for compositing two images or frames together
in which a color (or a range of colors) from the main image (video signal) is
removed (or made transparent), revealing another image behind it. The key is the
image that punctures through the image of the video signal.
In Epsio, you select the green color of the playfield (or a range of green) and
replace it by the key layer. The key layer will define how the offside line animation
will be displayed:
• All that is white in the key layer will not be incrusted.
In the final result, the key is transparent and the main image will show.
• All that is black in the key layer will be incrusted with the offside line animation.
In the final result, the main image is covered by the offside line animation.
• The more an area is black, the more the incrusted material will show.
In summary, when you define the chroma key, you define the color or color range
in the video signal that will be replaced by the offside line animation.