Set Chroma Key - OSEE GoStream Deck User Manual

Panel Layout and Device Features

4.1.3.12 Set Chroma Key

Chrome key usually selects a specified color sampled in the fill source to form a
selection area which will be removed, and you can see the black area of the chrome
key is the keying result, as shown in the following illustration. The background signal
in range of this selection will be visible. This is often used as green screen matting.
The default sample color of the switcher is green which is often used for chroma key.
You can enable a sample cursor to define a customized sample color by setting
Sample, SMP X Position and SMP Y in Chroma Key→Control submenu.
To refine the selection, use the parameters in Chroma Key→Control menu to set
Foreground, Background and KeyEdge to make the selection more qualified and
cleanly.
Here's how to generate the above chroma key:
◼ Background Source: a full screen image, the program output source in the
switcher, here is a weather map;
◼ Fill Source: the image to be displayed on top of your background video, and
in the case of a chroma key, this is video of the meteorologist in front of the
green screen; set the fill source by Chroma Key→source →Fill item, and
you can sample a color to be removed from the fill source by Chroma
Key→Control settings.
◼ Chroma Key: the area defined in black is generated from the settings of Fill
and Control items, and this black area will be removed from the fill source,
and the left area of fill source will leave stacked on top of background.
 Select fill source for chroma key by setting Chroma Key →Source→Fill Source,
and to refine the selection area for chroma key Chroma Key→Control menu item.
Refer to "5.1.5 Chrome Key " for the details about chroma key parameters.
 When sampling on screen, we recommend sampling the darkest area first to give
you a more accurate key.
Figure 4.1-46 Chroma Key Illustration
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