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Refining the Key

Refining the Key

Blurring Grainy Clips

 

Effects > Keyer > Refining the Key > 

Modifying the Edges of the Key

Use the Shrink, Erode, and Blur controls in the Matte menu to enhance the edge of the keyed image.

To access the Matte menu:

1. In the Keyer, click Keyer.

   The Matte controls appear.

   
   

To shrink the edge of the matte:

1. In the Matte menu, enable Shrink.
2. Set a value in the Shrink Width field.

   
   

   (a) Shrink Width field  (b) Blur Width field  (c) Erode Width field  

   This value specifies the width of the border, in number of pixels, that is removed from the edge of the matte.

   The matte before enabling the Shrink filter

   The matte after setting the shrink width value to 1.00

To erode the edge of the matte:

1. In the Matte menu, enable Erode.
2. Set a value in the Erode Width field.

   
   

   This value specifies the width of the matte border, in number of pixels, that will be softened.

   The matte before enabling the Erode filter

   The matte after setting the erode width value to 1.00

To blur the edge of the matte:

1. In the Matte menu, enable Blur.
2. Set values in the Blur Width and Height fields.

   
   

   These values specify the width and height of the Blur filter applied to the edge of the matte.

   The matte before enabling the Blur filter

   The matte after setting the blur width and height values to 1.00

To select a filter option:

1. In the Keyer, click Setup.
2. From the Filter box, select the type of blur filter you want to apply.

   
   

   Select:	To:
   Gaussian Filter	Produce a subtle effect using subpixel resolution. Gaussian blurs usually produce a smooth blur.
   Box Filter	Produce a blur that requires less processing.