Creative Effects > 3D Keyer > Creating a Precise Key > 
Using YUV Softness
 
 
 

If you are not satisfied with the softness result—for example, if graininess still remains in the softened areas, try using YUV Softness. This option calculates the softness according to the YUV colour space.

YUV Softness often creates softened areas that are smoother and is typically useful for shadows and transparencies. However, since it removes more noise, the resulting softness range is less precise.

NoteYou can switch between RGB and YUV Softness and retain their settings.

To use YUV Softness:

  1. Select YUV from the Softness box.

    Show small imageShow large image

  2. Sample for softness as described in Setting the Softness.
  3. Minimize the noise as described in Removing Noise from Softened Areas.

Compare YUV with RGB Softness

Select RGB Softness from the Softness box. The previous RGB Softness range is still in effect. Compare the results with the YUV Softness. Generally, the softness ellipsoid is larger with YUV Softness, as shown in the following example.

Show small imageShow large image

With RGB Softness, the softness ellipsoid is bound by the convex hull

Show small imageShow large image

With YUV Softness, the softness ellipsoid is scaled according to the Y component of YUV colour space

If you are satisfied with the result, use YUV Softness. If not, return to RGB softness.