How band pass filtering is physically achieved by convolving logGabor filter generated with some center frequency?

Hi, I am trying to understand LogGabor filters in frequency domain.I understand that A complex Gabor filter is defined as the product of a Gaussian kernel times a complex sinusoid.

    "The goal is to isolate an 80 hertz band of frequencies centered on 2 kHz. "

My doubt is -How this is physically achieved by convolving logGabor filter generated with center frequency 2 hz. How it actually gives the required output?I am not able to visualize this. I am using gaborconvolve.m function from http://www.csse.uwa.edu.au/~pk/studentprojects/libor/sourcecode.html

Answer 1

[Laurent]

The difference betwwen Gabors and log-Gabors is small for low bandwidths but important:

the gaussian enveloppe is on the linear scale of frequencies for Gabors, but on a logarithmic scale for frequencies for log-Gabors (hence the name).

if you are interested in more info + python code, something similar is coded using the package available @ https://pythonhosted.org/LogGabor/