The paper I am reading calls for the use of a band-pass convolution that is performed using a difference of Gaussians filter. How does this image processing operation work?
+1
A:
This probably refers to a difference of Gaussians filter. See http://en.wikipedia.org/wiki/Difference_of_Gaussians
In signal processing a filtering is described as the convolution of the original signal with a filter kernel. This is equivalent to transforming signal and filter to the frequency domain, multiply there and transform them back to the spatial domain afterward.
michid
2010-07-28 20:30:03