Datavideo DVK-400, Instruction Manual

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BG Blur
Enable BG Blur to create a fuzzy background for BG and PFG video sources. Use the slider or left
and right arrow keys to adjust the blur level. 0 means no blur and 100 is maximum blur.
Blur time sets the fuzzification time, ranging from 0 to 20. For example, if the blur time is set to 20,
multiply this number by 0.1 to derive the fuzzification time of 2 seconds. Hence, as you switch the
BG Blur ON/OFF, you will see the background transitioning to the fuzzy or original background
within the set blur time.
To reset, simply click the Reset button. The default blur value is 50 and the default blur time is 5.
4.5 Garbage Mask
After you apply a key, you may need to crop unwanted background elements that cannot be keyed,
such as the screen edge or lighting rigs that appear in the background. Using the Garbage Mask tool,
you can create a garbage mask that removes unwanted elements.
First enable the Garbage Mask (ON by default), then set the border width by adjusting the mask’s
left, right, top and bottom edges using the respective sliders or the left and right arrow keys.
Increasing these values reduces the size of the foreground screen.