Function GABOR_2D

Package

Short description

Usage

    gab = GABOR_2D(N, M, sigma0, slant, xi, theta, offset, precision)

Input

    N (numeric): width of the filter
    M (numeric): height of the filter
    sigma0 (numeric): standard deviation of the envelope
    slant (numeric): excentricity of the elliptic envelope
            (the smaller slant, the larger angular resolution)
    xi (numeric):  the frequency peak
    theta (numeric): orientation in radians of the filter
    offset (numeric): 2-D vector reprensting the offset location.
    Optional
    precision (string): precision of the computation. Optional

Output

    gab(numeric) : N-by-M matrix representing the gabor filter in spatial
    domain

Description

    Compute a Gabor wavelet. When used with xi = 0, and slant = 1, this 
    implements a gaussian
    Gabor wavelets have a non-negligeable DC component which is
    removed for scattering computation. To avoid this problem, one can use
    MORLET_2D_NODC.

See also

• morlet_2d_nodc
• morlet_2d_pyramid