Fine-Tuning The Key-Colors; Adjusting The Scene; Cancelling The Settings - Videonics MX-1 Instruction Manual

VIDEONICS DIGITAL VIDEO MIXER
• Press OK. All areas of the picture that match the color under the cursor
will be replaced by the background source (B).
• You can increase the range of colors that will be keyed by identifying
additional key-colors. To do this, use the arrow keys to position the cursor
over a portion of the image that has not been keyed away and press the OK
button again. Keep doing this until you have captured the entire back-
ground. Each time you press OK, the Mixer widens the range of colors it
keys to include the color under the cursor at that moment. You can pick as
many points as you wish. (You can also adjust the keyed-color range, as
explained in the next section.)
• If you accidentally overdo it and pick a point that keys out part of the
subject, you can reverse the choice by pressing SHIFT and OK simulta-
neously. This removes the effect of the last point you picked. It also
removes all fine-tuning (as explained in the next section).

Fine-tuning the Key-Colors

You can fine-tune the chroma key effect so that more or less of the fore-
ground video will be keyed. You can separately adjust the range of colors that
will be keyed, or the range of video brightness that will be keyed:
• To adjust the brightness range, hold SHIFT and press the up and down
arrows. SHIFT+UP increases the range of brightness values that will be
keyed, so more of the foreground picture will be replaced with back-
ground image. SHIFT+DOWN decreases the brightness range, reducing
the portion of the picture that will be keyed.
• To adjust the color range, hold SHIFT as you press the right and left arrows.
SHIFT+RIGHT increases the range of colors that will be keyed, so more of
the foreground picture will be replaced with background image.
SHIFT+LEFT decreases the range of key-colors, reducing the portion of
the picture that will be keyed.

Adjusting the Scene

If part of the subject is too similar to the color of the background, you may
be unable to capture the entire background without also capturing some of
the subject. You will need to adjust the lighting or use a background with a
different color.

Cancelling the Settings

You can cancel all the chroma key settings by pressing the SHIFT and
CHROMA KEY buttons at the same time. This removes all the key-color
points you have selected (as if you had never used the OK button) and it
removes all fine-tuning (as if you had never used SHIFT with
the arrow keys).
effect, removing the last OK press) by pressing SHIFT and OK
at the same time. This also removes all fine-tuning.
You can eliminate the effect of the last key-color point (in
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