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10-6. Chroma Key
Chroma key is a method for creating a key signal using a chroma
component instead of a
luminance component. It is mostly used for compositing
moving subjects such a person in the
virtual background. For example, to place a person onto a background graphic, first film the
person standing in front of a background such as a blue screen. The blue part of the filmed
image is detected and will be used to create the key signal.
10-6-1. Creating
a Chroma Key
(1) Select a signal to be used as a background on the M/E1 PGM bus.
(2) Press the KEY1 button in BUS SELECT and select a Chroma key signal in the KEY/AUX
bus. (The signal can be selected in the INSERT item in the [M/E1 KEY1 - INS/SRC]
menu.)
(3) Quickly press KEY1 twice in BUS SELECT to display the [M/E1 KEY1 SETUP] menu.
(4) Turn F1 to select INS/SRC, and press F1 or the page down button.
ME1 KEY1:>
INS/SRC
>EDGE >MASK >CK
SETUP :>POS/SIZ >BORDER >SUB EFF >INIT
(5) The [M/E1 KEY1 - INS/SRC] menu is displayed. Turn F1 to set
TYPE
to CHR.
ME1 KEY1: TYPE :INSERT :SOURCE :INVERT : 1/4
INS/SRC : =
CHR
: >IN01 : =IN01 : =OFF :
(6) Press KEY1 ON AIR to display KEY1 on the M/E1 program screen.
(7) Press the page up button to return to the [M/E1 KEY1 SETUP] menu.
(8) Turn F1 to select CK and press F1 to display the [M/E1 KEY1 - AUTO CK] menu.
(9) Turn F3 to change
SELECT
to ON to activate the Auto Chroma key.
ME1 KEY1: POSITION :SELECT :PGM OUT: 1/5
AUTO CK :X=0 Y=0 : =
ON
: =OFF :
(10) KEY1 is displayed on the topmost layer of the M/E1 preview image and a cross hair
cursor appears. The current position of the cursor is displayed at
POS X
and
POS Y
in the
[M/E1 KEY1 - AUTO CK] menu.
If you need to have a crosshair cursor also appear on the M/E1 PGM screen, set the
PGM
OUT
item to ON in the [M/E1 KEY1 - AUTO CK] menu.
Chromakey
