Table 2.

The values of the Gabor filter parameters.

Parameters	Values
Number of scales	8
Number of orientations	8
Wavelength ($\lambda$)	$4\pi ;4\sqrt{2}\pi ;8\pi ;8\sqrt{2}\pi ;16\pi ;16\sqrt{2}\pi ;32\pi ;32\sqrt{2}\pi$
Orientation ($\theta$)	$0;\frac{\pi }{8};\frac{2\pi }{8};\frac{3\pi }{8};\frac{4\pi }{8};\frac{5\pi }{8};\frac{6\pi }{8};\frac{7\pi }{8}$
Maximum frequency	0.250
Frequency ($f$)	$0.250;0.177;0.125;0.088;0.062;0.044;0.031;0.022$
Sigma ($\sigma$)	$4\sqrt{2}\pi ;8\pi ;8\sqrt{2}\pi ;16\pi ;16\sqrt{2}\pi ;32\pi ;32\sqrt{2}\pi ;64\pi$
Phase offset ($\psi$)	0.1
Spatial aspect ratio ($\gamma$)	$\sqrt{2}$
Envelope	Gaussian