ZBlur In the S_ZBlurs Plugin. Blurs areas of the source clip by different amounts using depth values from a ZBuffer input. Separates the input into a number of layers in depth and blurs them by different amounts depending on each layer's depth. Linear fog can also be mixed into the result. To use this effect, first set ZBuffer:Black Is Near or White Is Near according to your Z buffer, then adjust the focus depth and depth of field parameters to get the look you want. To help set the focus depth, you can use Show: In Focus Zone. Inputs: Source:  The clip to be processed. ZBuffer:  The input clip containing depth values for each Source pixel. These values should be in the range of black to white, and it is best if not anti-aliased. Normally black corresponds to the farthest objects and white to the nearest, though this can be adjusted using Z Buffer parameter.

Parameters:

Focal Depth:   Default: 0,  Range: any,  Shared.
The depth of the focus plane; 0 is near and 1 is far. Areas with this Z value will be in focus. Objects near this depth may be in focus depending on the Depth of Field parameter. You can use Show: In Focus Zone to show the Focal Depth when adjusting. If the effect of this parameter seems backwards, you can invert the depth values using the Z Buffer parameter.

Depth Of Field:   Default: 0.1,  Range: 0 to 1,  Shared.
Specifies how wide a range of depths near the Focal Depth will be in focus. If the Focal Depth is 0.5 and Depth of Field is 0.2, all objects with Z values from 0.4 to 0.6 will be in focus. Set to zero to have only objects exactly at the Focal Depth in focus. You can use Show: In Focus Zone to show this when adjusting.

Layers:   Integer,  Default: 5,  Range: 2 to 50,  Shared.
The number of depth layers to separate the source into. More layers require more processing but give smoother results in Z. More layers are sometimes needed to avoid visible seams between the layers.

Mode:   Popup menu,  Default: Interp Layers.
Determines how the differently blurred layers are combined.

Comp Layers:  the closer layers are composited over the farther layers. This method often gives better results if you have objects at different depths overlapping each other with discontinuous values in your depth image. However, this option can be slower, and sometimes artifacts between layers are visible.

Interp Layers:  the layers are interpolated using depth image values. This method gives smoother transitions between layers, and is usually better if there are no sharp changes in your depth image.

Z Buffer:   Popup menu,  Default: White is Near.
How to interpret the values in the Z buffer.

Black is Near:  Black pixels in the Z buffer indicate that the object at that point is near (close to you), and white means far away.

White is Near:  White pixels in the Z buffer indicate that the object at that point is near (close to you), and black means far away.

Show:   Popup menu,  Default: Result.
Selects the type of output

Result:  Shows the normal result of the effect.

In Focus Zone:  Highlights the in-focus areas of the clip to make it easier to select the focal point and depth.

Width:   Default: 0.2,  Range: 0 or greater,  Shared.
Scales the overall amount of blur. This parameter can be adjusted using the Width Widget.

Width Rel:   X & Y,   Default: [1 1],  Range: 0 or greater,  Shared.
The relative horizontal and vertical blur widths. Set Blur Rel X to 0 for a vertical-only blur, or set Blur Rel Y to 0 for a horizontal-only blur. This parameter can be adjusted using the Width Widget.

Params2:

Width Rel Near:   Default: 1,  Range: 0 or greater,  Shared.
Scales the blur width for parts of the image that are nearer than the focal plane.

Width Rel Far:   Default: 1,  Range: 0 or greater,  Shared.
Scales the blur width for parts of the image that are farther away than the focal plane.

Fog Near:   Default: 0,  Range: 0 to 1,  Shared.
The amount of fog to add to nearby (close) objects.

Fog Far:   Default: 0,  Range: 0 to 1,  Shared.
The amount of fog to add to far away objects.

Fog Color:   Default rgb: [0.5 0.5 0.5],  Shared.
The fog color should normally match the sky or background color of the source clip. Use gray for mist, brown for smog, blue for underwater, etc.

See Also:

ZDefocus

ZGlow ZConvolve

Sapphire Plug-ins Introduction

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