I'm just getting interested in image processing and was reading up about scale
spaces. If anyone is familiar with the discipline I have a question. What's
the correct way to go about creating a gaussian scale space? The process of the
correct way to apply the gaussian filter to a digital image is where I'm
initially having trouble. The digital image is discrete, and the gaussian
filter operates on a continuous function. I've read that it's improper to
simply sample the gaussian at various points that correspond to the discrete
points and perform the convolution discretely. It's been mentioned that the
modified Bessel function is the correct discrete analogue to the continuous
gaussian. My other alternative is to interpolate the digital image in some
fashion (bicubic, etc.) and then apply the gaussian to the result of that.
However, once again, I've read that doing that is also improper.
Does anyone know what I'm talking about and if so, how should I go about
creating a gaussian scale space from a digital image?
Gaussian Scale Space
Started by ●June 5, 2009
Reply by ●June 10, 20092009-06-10
On Thu, 4 Jun 2009, Donato Richardson wrote:
> I'm just getting interested in image processing and was reading up
> about scale spaces. If anyone is familiar with the discipline I have a
> question. What's the correct way to go about creating a gaussian scale
> space? The process of the correct way to apply the gaussian filter to a
> digital image is where I'm initially having trouble.
http://en.wikipedia.org/wiki/Scale-space_implementation
--
Kind regards,
Filip Rooms
Universiteit Gent - TELIN/IPI/IBBT
Sint-Pietersnieuwstraat 41, 9000 Gent
+32 9 264 34 15
http://telin.ugent.be/~frooms/
"...very few phenomena can pull someone out of Deep Hack Mode, with two
noted exceptions: being struck by lightning, or worse, your *computer*
being struck by lightning."
(By Matt Welsh)
> I'm just getting interested in image processing and was reading up
> about scale spaces. If anyone is familiar with the discipline I have a
> question. What's the correct way to go about creating a gaussian scale
> space? The process of the correct way to apply the gaussian filter to a
> digital image is where I'm initially having trouble.
http://en.wikipedia.org/wiki/Scale-space_implementation
--
Kind regards,
Filip Rooms
Universiteit Gent - TELIN/IPI/IBBT
Sint-Pietersnieuwstraat 41, 9000 Gent
+32 9 264 34 15
http://telin.ugent.be/~frooms/
"...very few phenomena can pull someone out of Deep Hack Mode, with two
noted exceptions: being struck by lightning, or worse, your *computer*
being struck by lightning."
(By Matt Welsh)