S_MatteOps Grows, shrinks, or adds noise to the alpha channel of the Source input. This can be useful for removing blue or green spill from a chroma key. In the Sapphire Composite effects submenu. Inputs: Source:  The current layer.   The input clip containing the matte to process. The matte is assumed to have anti-aliased but hard edges, because very soft edges might not be affected in a useful way.

Parameters:

Shrink- Grow+:   Default: 0,  Range: any.
Amount to grow the matte edges in approximate pixels, or shrink if negative.

Edge Softness:   Default: 1,  Range: 0.01 or greater.
The resulting softness of the edges.

Post Blur:   Default: 0,  Range: 0 or greater.
If positive, the result is blurred by this amount. This is an alternative method for softening the edges.

Filter:   Popup menu,  Default: Triangle.
The type of blur filter to use for the shrink or grow process.

Box:  uses a rectangular shaped filter.

Triangle:  smoother, uses a pyramid shaped filter.

Gauss:  smoothest, uses a gaussian shaped filter.

Matte Use:   Popup menu,  Default: Alpha.
Determines how the Matte input channels are used to make a monochrome matte.

Luma:  the luminance of the RGB channels is used.

Alpha:  only the Alpha channel is used.

Invert Matte:   Check-box,  Default: off.
If enabled, the black and white of the output matte are inverted.

Output:   Popup menu,  Default: RGBA.
Selects the format of the output.

Matte:  the processed Matte is output as white.

RGBA:  the Alpha output channel receives the processed Matte, and the RGB channels are passed through from the input unchanged.

RGBA Premult:  the Alpha output channel receives the processed Matte, and the RGB channels receive the input multiplied by the new Matte. This option can be appropriate if you are shrinking a matte and need an RGBA result for pre-multiplied compositing.

Matte Premult:  the processed Matte is output on all channels.

Noise Amplitude:   Default: 0,  Range: 0 or greater.
The amount of noise texture to add to the edges.

Noise Width:   Default: 2,  Range: 0 or greater.
The width of the area at the matte edges where the noise is included. This has no effect unless Noise Amplitude is positive

Frequency:   Default: 100,  Range: 0.1 or greater.
The frequency of the noise. Increase for finer grain noise, decrease for coarser noise. This has no effect unless Noise Amplitude is positive.

Frequency Rel X:   Default: 1,  Range: 0.01 or greater.
The relative horizontal frequency of the noise. Increase to stretch the noise vertically, decrease to stretch it horizontally. This has no effect unless Noise Amplitude is positive.

Octaves:   Integer,  Default: 1,  Range: 1 to 10.
The number of summed layers of noise. Each octave is twice the frequency and half the magnitude of the previous. This has no effect unless Noise Amplitude is positive.

Seed:   Default: 0.23,  Range: 0 or greater.
Used to initialize the random number generator. The actual seed value is not significant, but different seeds give different results and the same value should give a repeatable result.

Noise Shift:   X & Y,   Default: [0 0],  Range: any.
The horizontal and vertical translation of the noise texture.

Jitter Frames:   Integer,  Default: 1,  Range: 0 or greater.
If this is 0, the noise texture will remain the same for every frame processed. If it is 1, a new noise texture is used for each frame. If it is 2, a new noise texture is used for every other frame, and so on.

See Also:

MatteOpsComp

Distort WarpBubble Diffuse Sapphire Plug-ins Introduction

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