Howtosignalprocessing
- What do the Gabor filter parameters mean?
- What is Gabor bandwidth?
- How does Gabor filter work?
- What are log Gabor filter and why are they good?
What do the Gabor filter parameters mean?
There are basically 2 parameters defining the shape of a Gabor filter. One parameter (often denoted with sigma) defines the standard deviation of the Gaussian envelope whereas another parameter (often denoted with omega) represents the wavelength of the sinusoidal plane wave.
What is Gabor bandwidth?
Bandwidth. (b) specifies the spatial-frequency bandwidth of the filter when the Gabor function is used as a filter kernel. The bandwidth is specified in octaves. Values typical of the receptive fields of simple cells lie between 0.4 and 2.5 but the applet accepts other values as well.
How does Gabor filter work?
In image processing, a Gabor filter, named after Dennis Gabor, is a linear filter used for texture analysis, which essentially means that it analyzes whether there is any specific frequency content in the image in specific directions in a localized region around the point or region of analysis.
What are log Gabor filter and why are they good?
The Log-Gabor filter is able to describe a signal in terms of the local frequency responses. Because this is a fundamental signal analysis technique, it has many applications in signal processing. Indeed, any application that uses Gabor filters, or other wavelet basis functions may benefit from the Log-Gabor filter.
