protected static Kernel2D_F64 gaussian2D_F64(double sigma, int radius, boolean normalize) { Kernel1D_F64 kernel1D = gaussian1D_F64(sigma, radius, false); Kernel2D_F64 ret = KernelMath.convolve(kernel1D, kernel1D); if (normalize) { KernelMath.normalizeSumToOne(ret); } return ret; }