for( j = 0; j < square_root_times; j++)
{
num.re = old_num_re*old_num_re + old_num_im*old_num_im;
- num.re = std::sqrt(num.re);
+ num.re = sqrt(num.re);
num.re += old_num_re;
num.im = num.re - old_num_re;
num.re /= 2;
- num.re = std::sqrt(num.re);
+ num.re = sqrt(num.re);
num.im /= 2;
- num.im = std::sqrt(num.im);
+ num.im = sqrt(num.im);
if( old_num_re < 0 ) num.im = -num.im;
}
if( num_same_root % 2 != 0){
Mat cube_coefs(4, 1, CV_64FC1);
Mat cube_roots(3, 1, CV_64FC2);
- cube_coefs.at<double>(3) = -(std::pow(old_num_re, 3));
- cube_coefs.at<double>(2) = -(15*std::pow(old_num_re, 2) + 27*std::pow(old_num_im, 2));
+ cube_coefs.at<double>(3) = -(pow(old_num_re, 3));
+ cube_coefs.at<double>(2) = -(15*pow(old_num_re, 2) + 27*pow(old_num_im, 2));
cube_coefs.at<double>(1) = -48*old_num_re;
cube_coefs.at<double>(0) = 64;
- cv::solveCubic(cube_coefs, cube_roots);
+ solveCubic(cube_coefs, cube_roots);
- num.re = std::pow(std::abs(cube_roots.at<double>(0)), 1/3);
- if(cube_roots.at<double>(0) < 0) num.re = -num.re;
- num.im = std::sqrt(std::pow(num.re, 2) / 3 - old_num_re / (3*num.re));
+ if(cube_roots.at<double>(0) >= 0) num.re = pow(cube_roots.at<double>(0), 1./3);
+ else num.re = -pow(-cube_roots.at<double>(0), 1./3);
+ num.im = sqrt(pow(num.re, 2) / 3 - old_num_re / (3*num.re));
}
}