Manual - Holdan.eu
Manual - Holdan.eu
Manual - Holdan.eu
Create successful ePaper yourself
Turn your PDF publications into a flip-book with our unique Google optimized e-Paper software.
Adjust keyers<br />
Keyer enable<br />
[Off]<br />
This menu item turns keying On or Off for the current foreground. A keyed<br />
image is in essence one image superimposed over another – such that<br />
portions of the top image are made transparent (keyed out), so that the<br />
background image can show through. The following settings allow you to vary<br />
the colour(s) that are keyed out.<br />
Adjust keyers<br />
Swap fore/backgrnd<br />
[Off]<br />
This menu item is only present on single-channel scalers – dual-channel<br />
scalers have the layer priority set within the ‘Adjust Windows’ menu.<br />
This menu item allows you to swap the foreground and background images<br />
when Lock mode is set to Lock & Mix. It will have no effect in any other mode<br />
(since no background is present).<br />
Normally, your foreground is the input (window) source and your background<br />
is the lock source. This then allows you to superimpose any graphics or video<br />
input on top of the lock source by keying out a certain color or range of colors<br />
in the input source. Swapping them means that the input source moves to the<br />
background and the lock source is now in front of it. Thus you are now keying<br />
out the lock source colors to reveal the input source behind it.<br />
Note that this is different to simply swapping over the input and lock sources<br />
as that would affect the final output resolution – see examples below:<br />
Input<br />
source<br />
Lock<br />
source<br />
Swap Foreground<br />
(keyed)<br />
Background<br />
(non-keyed)<br />
Output<br />
resolution<br />
XGA NTSC Off XGA NTSC NTSC<br />
XGA NTSC On NTSC XGA NTSC<br />
NTSC XGA Off NTSC XGA XGA<br />
NTSC XGA On XGA NTSC XGA<br />
(XGA is 1024x768)<br />
You will see that the Swap between foreground and background has no effect<br />
on the output resolution as this is always set by the Lock source.<br />
Adjust keyers<br />
Y Key min/max [ 0] [ 32]<br />
The Min/Max parameters are used to select what range of Y (luminance/greyscale)<br />
values are made transparent within the selected window/lock source.<br />
In order to key out part of an image, start with the max value and increase it<br />
until the required lighter parts within the window/lock source disappear. Then<br />
adjust the min level to bring back any darker parts of the image.