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5. Menu Orientation

Key Menu

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A Luma (luminance) key is one in which the hole-cutting information is derived from the luminance (brightness) level of the key source.

Note

Luma keys can be selected on both the Layer A and Layer B keyers, in both Split and Mix modes.

The following Key Menu functions are provided when Luma key is selected:

•Invert Mode — enables you to invert the key signal.

•Clip — adjusts the threshold of the video that “cuts” into the background image. A hole will be cut into the background anywhere that foreground luminance is greater than the clip level. The hole is then filled with the Fill Source.

~Adjustment range: 0 to 1023

•Gain — adjusts the sensitivity of the keyer, enabling you to change the sharpness of the keyed image. Gain only affects the key hole, as set by the clip.

~Adjustment range: 0 to 1023.99

•Opacity — enables you to adjust the opacity of the keyed image, from fully opaque to fully transparent.

~Adjustment range: 0 to 1024

•Fill Source — determines the video that fills the key hole:

~Self — fills the hole with the key source video itself, for example, the video from a character generator or logo.

~Matte — fills the hole with a matte color, which can be adjusted with the Matte Menu. See the “Matte Menu” section on page 228 for details.

•Press {STATS} to display the Status Menu. Refer to the “Status Menu” section on page 212 for details.

•Press {CLONE} to display the Clone Setup Menu (if Clone is enabled). Refer to the “Clone Setup Menu” section on page 216 for details

•Press {EFX} to display the Image Effects Menu. Refer to the “Image Effects Menu” section on page 220 for details.

•Press {MATTE} to display the Matte Menu. Refer to the “Matte Menu” section on page 228 for details.

•Press {SIZE & POS} to display the Key Adjustment Menu. Refer to the “Key Adjustment Menu” section on page 229 for details.

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A Color key is one in which the hole-cutting information is derived from a specific RGB value — including luminance.

Note

Color keys can be selected on both the Layer A and Layer B keyers, in both Split and Mix modes.

The following Key Menu functions are provided when Color key is selected:

•Red Color — adjusts the red component of the selected key color, from 0 to 1024.

•Green Color — adjusts the green component of the key color, from 0 to 1024.

226 Encore Presentation System • User’s Guide • Rev 04