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Home: Flint
Removing Grain
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Creating and Refining a Key
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Creating a Key by Extracting a Single Colour
Removing Unwanted Greys
If you have unwanted grey areas
in the matte, you can use up to three patches to isolate a range
of colours to be included in, or excluded from, the key.
NotePatch parameters are animatable. Patch samples
are also animatable and appear in the Channel Editor as a Matrix
channel, located in the Patch folder.
To
remove unwanted greys:
- In
the Master Keyer menu, select Patch1, Patch2, or Patch3 from the
Sampling box (or press 1, 2, or 3).
- Set
the view to Matte view or Result view.
- Sample
the image where you want to apply the patch. To sample a single
pixel, click the image. To sample an area of the image, Ctrl-drag a selection box.
When you Ctrl-drag
to sample, the sample is outlined in red. In the Master Keyer menu,
the Patch button is enabled and the appropriate patch appears in
the Patch box and is applied to the image.
NoteA Patch button is either enabled or disabled
for the entire clip—you cannot turn it on and off for different
frames in the clip.
Selected patch: |
Is applied to: |
Black |
Areas of the image to be included in the black part of
the matte.
|
White |
Areas of the image to be included in the white part of
the matte.
|
Edge Analysis |
Areas of the image that are along the edge of the key.
Edge Analysis is useful when there is a specific edge you want to
erode but cannot do so with the Matte parameters. You can then increase
or decrease the softness of this patch using the Soft field.
|
- To
add more colour to the patch, resample the image.
- To
use the same patch but start with a new sample, Ctrl+Alt-drag the image.
The sample is outlined in green, indicating
that you are resampling the current patch.
- To
manually select a patch type, select it from the Patch box.
NoteIf you want to reset the patch so that you
can automatically select the patch type, you must disable the patch
and set the patch type to Off. You can then resample an area in
the image and generate a patch type.
- To
improve the patch, use the Patch controls.
Drag: |
To: |
Range |
Increase or decrease the colour range that is included
in the patch.
|
Soft |
Soften the edge. |
NoteTo reset Patch parameters, click the Reset
button, next to the sampling box.