S_DistortChroma Warps the chrominance of the source input by different amounts using the gradient of the Lens input clip. This can generate optical glass-like effects as if the source clip were being viewed through an arbitrarily shaped or textured prism. It is best demonstrated when the lens image contains just a few simple bold shapes. In the Sapphire Distort effects submenu. Inputs: Source:  The current layer.   The clip to be processed. Lens:  Defaults to None.   Distorts the source using the brightness values of this input clip. Matte:  Defaults to None.   If provided, the amount of lens distortion is scaled by this input, so the Source is unaffected where the Matte is black. This input can be affected using the Blur Matte, Invert Matte, or Matte Use parameters.

Parameters:

Amount:   Default: 1,  Range: any.
The severity of the lens distortions. Make negative to invert the direction of the distortions.

Blur Lens:   Default: 36,  Range: 0 or greater.
Smooths out the edges in the lens image by this amount before using it.

Rotate Warp Dir:   Default: 0,  Range: any.
Rotates the warping direction by this many degrees. If non-zero, this can add some unusual twisting effects to the lens distortion.

Warp Red:   Default: 0.5,  Range: any.
The magnitude of lens distortion for the red end of the spectrum. Make negative to invert the direction of the red distortions.

Warp Blue:   Default: 1,  Range: any.
The magnitude of lens distortion for the blue end of the spectrum. Make negative to invert the direction of the blue distortions.

Steps:   Integer,  Default: 8,  Range: 3 to 100.
The number of color samples along the spectrum to include. More steps give a smoother result, but require more time to process.

Color1:   Default rgb: [1 0 0].
The color at the 'red' end of the spectrum.

Color2:   Default rgb: [0 1 0].
The color in the middle of the spectrum.

Color3:   Default rgb: [0 0 1].
The color at the 'blue' end of the spectrum.

White Balance:   Check-box,  Default: off.
When enabled, the three colors are adjusted internally so they sum to white. In this case, the colors of unwarped regions are not affected and the average color of the result remains the same.

Wrap:   X & Y,  Popup menu,  Default: [Reflect Reflect].
Determines the method for accessing outside the borders of the source image.

No:  gives black beyond the borders.

Tile:  repeats a copy of the image.

Reflect:  repeats a mirrored copy. Edges are often less visible with this method.

Filter:   Check-box,  Default: on.
If enabled, the image is adaptively filtered when it is resampled. This gives a better quality result when parts of the image are warped smaller.

Blur Matte:   Default: 0,  Range: 0 or greater.
Blurs the Matte input by this amount before using. This can provide a smoother transition between the matted and unmatted areas. It has no effect unless the Matte input is provided.

Invert Matte:   Check-box,  Default: off.
If on, inverts the Matte input so the effect is applied to areas where the Matte is black instead of white. This has no effect unless the Matte input is provided.

Matte Use:   Popup menu,  Default: Luma.
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.

Opacity:   Popup menu,  Default: Normal.
Determines the method used for dealing with opacity/transparency.

All Opaque:  Use this option to render slightly faster when the input image is fully opaque with no transparency (alpha=1).

Normal:  Process opacity normally.

As Premult:  Process as if the image is already in premultiplied form (colors have been scaled by opacity). This option also renders slightly faster than Normal mode, but the results will also be in premultiplied form, which is sometimes less correct.

See Also:

Distort DistortBlur DistortRGB

EmbossGlass WarpChroma Sapphire Plug-ins Introduction

© 2007, GenArts, Inc. All rights reserved.