Additional Background Settings; Background Filter; Background Gradient; Test Signal - Blackmagicdesign Smart Remote 4 Operation Manual

Additional Background Settings

Background Filter

In many situations, particularly with computer generated backgrounds, the graphics will appear
too sharp compared to the foreground subjects. Sometimes, this sharpness can cause aliasing
artifacts if the antialiasing filters are not set properly in the background rendering system.
Advancing the background filter control will gradually apply a horizontal low pass filter to the
background scene, minimizing aliasing artifacts.

Background Gradient

Enabling this button will replace the background video with an internally generated horizontal
gradient signal. This gradient signal can be used to better demonstrate the impact of
background color controls on the background image.

Test Signal

This setting lets you use a colored field as the background in the final composite.

Additional Layer Settings

Test Signal
This setting lets you use a colored field as the layer source in the final composite.

Layer Input

Enabling this function allows the layer elements to be added to the composite scene.

Layer Input Realistic/Linear/Additive

This function selects between three modes of combining the layer input elements with the
foreground objects and the background scene in the composite image.
Realistic
Most accurate method of combining colored transparent and semi transparent layer
elements, as well as opaque layer elements, with the foreground objects and the
background scene.
NOTE When using a layer source graphic in realistic layer mode with semi
transparent objects, the image source background needs to be 100% white. The
RGB elements in the source layer should not be premultiplied by its matte. All
feathering of transition regions along edges of the matte should be within the
boundaries of the layer elements. For example, make sure feathered edges do not
extend into the white backing region of the source image.
Linear
Traditional method of combining opaque layer elements with the foreground objects
and the background scene in the composite image. This method will not produce
accurate results with transparent colored layer elements. This method should be
selected if the layer elements are not premultiplied.
Additive
Traditional method of combining opaque layer elements with the foreground objects
and the background scene in the composite image. This method will not produce
accurate results with transparent colored layer elements and should be selected if the
layer elements are premultiplied.
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