FSR MAS-6100, Installation And Operating Manual

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18
MAS-6100 / MAS-6100A
resolution – see examples below:
Input source Lock source Swap
Foreground
(Keyed)
Background
(Non-
keyed)
Output
Resolution
XGA NTSC Off XGA NTSC NTSC
XGA NTSC On NTSC XGA NTSC
NTSC XGA Off NTSC XGA XGA
NTSC XGA On XGA NTSC XGA
(XGA is 1024x768)
Key Adjust Key Adjust
Key ON/OFF [Off] Key ON/OFF [Off]
This menu item turns keying On or Off for the current foreground. A keyed image is in essence one image
superimposed over another – such that portions of the top image are made transparent (keyed out), so that the
background image can show through. The following settings allow you to vary the color(s) that are keyed out.
Key Adjust Key Adjust
Y Key min/max [ 0] [ 32] Y Key min/max [ 0] [ 32]
The Min/Max parameters are used to select what range of Y (luminance/grey-scale) values are made transparent
within the selected window/lock source. In order to key out part of an image, start with the max value and
increase it until the required lighter parts within the window/lock source disappear. Then adjust the min level to
bring back any darker parts of the image.
Key Adjust Key Adjust
Y Key softness [ 0] Y Key softness [ 0]
The Y Key softness option removes noise from the keyed image, generally at the edges. Adjust as required
to make the edges of the key as sharp or as soft as desired. The noise is where the analog to digital process
(A/D conversion) may not sample a 50% brightness as being exactly 50% i.e. sometimes 49% and sometimes
51%. Increasing the softness value will broaden the range of keyed colors so that the keying of images varies
depending on how close a color is to the keyed-out range.