How opencv getGaborKernel function parameters related to orientation and scale parameters?
I assume theta is orientation, but what refers to scale?
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Here are the meaning of parameters:
ksize
Size of the filter returned.sigma
Standard deviation of the gaussian envelope.theta
Orientation of the normal to the parallel stripes of a Gabor function.lambda
Wavelength of the sinusoidal factor.gamma
Spatial aspect ratio.psi
Phase offset.ktype
Type of filter coefficients. It can be CV_32F
or CV_64F
.The orientation can be modified by theta
and the scale by i.e. lambda
. Here you have a good tutorial about What do the Gabor filter parameters mean?. Update September 2020: The link to What do the Gabor filter parameters mean? no longer works. Try Through The Eyes of Gabor Filter instead.
I also attach the image from the site above:
Copyright by Juergen Muller