Datavideo EPB-1340, Инструкция по эксплуатации, Страница: 72 / 87

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4.
Select “ Key 1 ” under the “ Keyer ” sub-option.
5. Select the camera image to be chromakeyed under the “ Key Source ” sub-option. In this example, the
source is “ Input 1 ,” which is Channel 1 .
6. Adjust the left, right, top and bottom values of the “ Mask ” sub-option to set the chroma key range,
which is the green backdrop size.
7. Open the Chroma page as shown below:
Chroma Keyer Key 1
Key Source Input 5
CK Setup CK Auto Hue 120 Luma 100%
KRange 170 K Fgnd 15% K Bgnd 67%
Hi-Light 0% Lo-Light 0% Bg-Supp On
Mask Left 0% Right 0%
Top 0% Bot 0%
8. Adjust the following parameters under “ CK Setup .”

Key Range defines a color range close to the color (green) of the studio backdrop.

Key Foreground adjusts the opaqueness and transparency.

Key Background adjusts the chromakey performance to achieve perfect chromakeying.

Hi-Light and Lo-Light adjust luma value of the chroma key.

Bg-Supp removes foreground and background luma (brightness) from the final image.
9. Chroma Key setting is done.
10. Repeat steps 1 – 9 to configure Key 2 , which is the image captured by camera 2.
11. After dual chromakey is configured, enable Channel 3 on the Program BUS and Channel 4 on the
Preset BUS.
12. Press Key 1 PGM and Key 2 PVW buttons to enable views of Camera 1 and Camera 2 on Program and
Preview display respectively. To trigger transition, simply move the T-bar manually or press the AUTO
button.