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Correct image distortion with reference image

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windmill
windmill on 2 Nov 2020
Answered: Prabhan Purwar on 12 Nov 2020
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)
pause
[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);
saveas(figure1,'undistorted.tif');

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Answers (1)

Prabhan Purwar
Prabhan Purwar on 12 Nov 2020
Hey,
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!!

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