MATLAB Answers

Correct image distortion with reference image

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windmill on 2 Nov 2020
Commented: Hezha Sadraddin on 15 Jun 2021
Hey, how can I correct an image for lense distortion using a reference image and control points and perform a cross correlation between the two images afterwards? I feel like the code that I have used is not the best way to do it...
orthophoto = imread('cropped_image.tif');
figure, imshow(orthophoto)
unregistered = imread('cropped_image2.tif');
figure, imshow(unregistered)
[movingPoints, fixedPoints] = cpselect(unregistered,orthophoto,'Wait',true);
cpselect(unregistered, orthophoto)
mytform = cp2tform(movingPoints, fixedPoints,'projective');
t = fitgeotrans(movingPoints, fixedPoints,'projective');
registered = imtransform(unregistered, mytform);
Rfixed = imref2d(size(orthophoto));
registered = imwarp(unregistered,t,'OutputView',Rfixed);
figure1 = imshow(registered);

Answers (1)

Prabhan Purwar
Prabhan Purwar on 12 Nov 2020
The best approach to correct image for lens distortion is to first get the camera intrinsics either from camera calibration(best) or through a set of images using control points (has scope for research). Then you may make use of undistortimage function.
Kindly have a look at the following link for more details:
Hope it helps!!
  1 Comment
Hezha Sadraddin
Hezha Sadraddin on 15 Jun 2021
Hey Prabhan Purwar
I estimated camera paramters from a set of pics and now I want to apply these paramters to undistort images which were not used in camera calibration. Can I do that?

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