matlab实现gabor filter (9) 效果很好

最新推荐文章于 2021-03-19 08:25:35 发布

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最新推荐文章于 2021-03-19 08:25:35 发布 · 4.5k 阅读

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#matlab #filter #lambda #matrix #function #vector

本文介绍了如何在MATLAB中实现Gabor滤波器，并提供了调用代码示例，展示了生成的滤波器组图像，效果显著。

gabor filter:

function result = gaborkernel2d(lambda, sigma, theta, phi, gamma, bandwidth)
% VERSION 2004-04-05
% CREATED BY: N. Petkov and M.B. Wieling, Groningen University
%
% GABORKERNEL2D(LAMBDA, SIGMA, THETA, PHI, GAMMA, BANDWIDTH) 
%   fills a (2N+1)*(2N+1) matrix with the values of a 2D Gabor function. N is computed from SIGMA.
%     LAMBDA - preferred wavelength (period of the cosine factor) [in pixels]
%     SIGMA - standard deviation of the Gaussian factor [in pixels]
%     THETA - preferred orientation [in radians]; can be a 1D array 
%     PHI   - phase offset [in radians] of the cosine factor; can be a 1D array
%     GAMMA - spatial aspect ratio (of the x- and y-axis of the Gaussian elipse)
%     BANDWIDTH - spatial frequency bandwidth at half response,
%       BANDWIDTH, SIGMA and LAMBDA are interdependent. To use BANDWIDTH, 
%       the input value of one of SIGMA or LAMBDA must be 0. Otherwise BANDWIDTH is ignor