Gabor的核函数参考的wiki
使用实数Real的公式计算核函数代码：
Mat getGaborFilter(float lambda, float theta, float sigma2,float gamma, float psi = 0.0f){if(abs(lambda-0.0f)<1e-6){lambda = 1.0f;} float sigma_x = sigma2;float sigma_y = sigma2/(gamma*gamma);int nstds = 3;float sqrt_sigma_x = sqrt(sigma_x);float sqrt_sigma_y = sqrt(sigma_y);int xmax = max(abs(nstds*sqrt_sigma_x*cos(theta)),abs(nstds*sqrt_sigma_y*sin(theta)));int ymax = max(abs(nstds*sqrt_sigma_x*sin(theta)),abs(nstds*sqrt_sigma_y*cos(theta)));int half_filter_size = xmax>ymax ? xmax:ymax;int filter_size = 2*half_filter_size+1;Mat gaber = Mat::zeros(filter_size,filter_size,CV_32F);for(int i=0;i<filter_si
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