INPUT CLIP
Clip to defocus.
Radius (Min: 0.0 Max: 50.0 Default: 1.0 )
Controls the radius of a disk over which each pixel of the input image is spread in the
output image.
Duplicate Edges (Default: On)
On=1: treats the edges of the picture as if they extended outside the input image.
Off=0: the input image is treated as if it were surrounded by black.
Filter quality (Default: Fast)
Exact=1: an accurate (but somewhat slower) algorithm is used which spreads the input
image in a way that is based on the ideal behaviour of real lenses. The input pixels are
distributed over circular regions of the output. In this case, processing time is directly
dependent on the size of the Radius.
Fast=0: a quicker but slightly less accurate algorithm is used.
PRINCIPLE OF OPERATION
In Exact mode, filtering is carried out using an accurately calculated Gaussian
filter and a separable kernel algorithm. Time required depends approximately linearly on
the filter radius. In Fast mode, a recursive application of a Gausian filter kernel
with adaptive spacing is used.