[Bf-committers] DOF camera parameters.
Thu, 10 Jun 2004 13:25:39 +0200 (CEST)
On Thu, 10 Jun 2004, Jonathan Merritt wrote:
> Hi Alexander,
> Indeed, both circumscribing the circle-of-confusion and z-blur are both
> In the z-blur method, hiding has already been done prior to calculation
> of blur. The advantage that the CoC method has is that hiding is *not*
> done prior to calculation of the blur. Hence, objects with a large
> circle-of-confusion can blur out from "behind" objects that would
> otherwise hide them (which happens in reality due to the fact that the
> lens and aperture of a real camera have a non-infinitesimal width).
> However, even the CoC method (as described) is still a hack, since the
> inside of the circle of confusion is not sampled.
The biggest problem the circle-of-confusion method has, in my opinion,
is that it is awfully slow.
> Shouldn't z-blur be possible as a filtering process (provided you can
> access depth information for each pixel)?
Yes, that's how it works. It uses the zbuffer supplied by Blender
(most of the blurring code is taken from strubi's zblur plugin)
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