Ross CrossOver 16 Specifications download pdf (Page 31)

Note: The Mode is reset to Normal when a different

source is selected on the key bus, the alpha is

changed, or a memory is recalled.

10.

Press NEXT.

11.

Use the Mask knob to apply a mask to the key.

The Auto Select key uses the pre-assigned Auto Key

association to select the proper video and alpha. If you

want to temporarily select a different video source for

the alpha, press and hold the AUTO SELECT button

and select the video source you want to use as the new

ll.

UltraChrome Chroma Key

An UltraChrome Chroma Key is a key in which the hole

is cut based on a color value, or hue, rather than a

luminance value or alpha signal. The color is removed

and replaced with background video from another source.

The default color is blue.

Chroma Key adjustments are persistent and are not

affected by a soft reset or switcher reboot. However,

initializing the Chroma Key or performing a factory reset

returns all adjustments to default values.

Chroma Key Modes

The UltraChrome Chroma Key operates in one of two

modes, Basic or Advanced, depending on the complexity

of the Chroma Key you are setting up.

• Basic Mode — In basic mode, UltraChrome

provides a simple background/foreground chroma

key with adjustment for background spill and edge

softness.

• Advanced Mode — In advanced mode,

UltraChrome provides advanced background

shadow and translucency control, as well as control

over background/foreground transition areas.

Although it is possible to switch back and forth between

advanced and basic mode, the additional image correction

of the advanced mode is only applied in the advanced

mode. For example, if you use the basic mode to set up

the Chroma Key and then switch to the advanced mode,

the entire image may change as the image correctors

provided by the advanced mode are applied at their

default settings.

Chroma Key Basic Mode

The following chroma key parameters can be adjusted

in Basic Mode:

• Background Area — Allows you to modify the

range of colors that are considered background and

are masked out of the Chroma Key.

• Edge — Allows you to adjust the amount of edge

softening applied to the foreground. This helps

blend the foreground into the new background.

• Foreground Area — Allows you to modify the

range of colors that are considered foreground and

are not masked.

• Luminance — Allows you to adjust the overall

brightness of the shadow, translucent, and

foreground-background transition area to improve

the Chroma Key appearance.

• Shadow — Allows you to adjust the amount of

shadow extraction from the background. This is

the actual shadow that the foreground subject is

casting onto the screen.

• Spill — Allows you to remove background color

casts that may spill into the foreground image

(green color cast on the foreground from a

green-screen for example).

• Foreground - Background Transition Gain —

Allows you to adjust the transparency of the

foreground - background transition area. This helps

blend the foreground into the new background.

• Translucency — Allows you to adjust the size and

transparency of translucent, or semi-transparent,

areas.

To Set Up a Chroma Key in Basic Mode

The UltraChrome chroma key tries to automatically

adjust for the scene you are trying to chroma key. For

the best results, initialize the key rst, and then identify

the areas where you need to adjust the key.

Select the keyer that you want to set up a basic

Chroma Key on.

Select the video signal on the key bus that you

want to use for the key.

Press CHR KEY.

Use the Mode knob to select Basic.

Use the Color knob to select the color you want

to key out.

Press the Init knob to initialize the chroma key.

Every time the Init knob is pressed, the switcher

resets all the Chroma Key parameters to their

default settings.

Press NEXT.

Adjust the Background as follows:

Use the Type knob to select Bkgd.

Use the Value knob to adjust the background

gain.

Carbonite Operation Manual (v8.0) — Keying • 31

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Ross CrossOver 16 Specifications Page 31

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