How to use the rotation and translation vector to translate undistorted image?
Assume that I have
cv::Mat image;
std::vector<cv::Point> image_coordinates;
std::vector<cv::Point> corresponding_output_coordinates;
I want to generate an output image such that the coordinates matches.
Normally I think I can use
auto transform=cv::findHomography(image_coordinates,corresponding_output_coordinates);
cv::Mat output;
cv::warpPerspective(image,output,transform,{output_width,output_height});
but it seems that the images are distorted too. So I think I can use cv::undistortImage
: (pseudocode)
Mat intrinsic;
Mat distCoeffs;
vector<Mat> rvecs;
vector<Mat> tvecs;
cv::calibrateCamera(
<vector containing 1 element = corresponding_output_coordinates converted to 3d coordinate>,
<vector containing 1 element = image_coordinates>, image.size(),
intrinsic, distCoeffs, rvecs, tvecs);
Mat result;
cv::fisheye::undistortImage(image, result, intrinsic, distCoeffs);
Now what should I do with rvecs
and tvecs
so that the result is rotated and translated to the correct position?