(I assume that when you say "transform", you mean "fourier-transform") Transforming/multiplying/transforming is only faster for fairly large kernels. Weather it is more accurate or not depends on what you're doing, and on the size of the kernel and transforms.
When it comes right down to it, I don't really care *how* it does it.
/ Fredrik (Naranek) Hubinette (T minus 2 weeks)
Previous text:
2004-08-26 09:35: Subject: nice-to-have-function
Is it supposed to be a "normal" convolution? If so, you should be able to transform the image, multiply and invers-transform. That ought to be faster and (probably) more accurate.
/ Marcus Agehall (PacketFront)