I'm working on a camera calibration through a series of pictures of a checkerboard. The original size of the images are 2048x2448. After transformation, the resulting corrected image with 'imwarp' is only 310x367. Although the transformation seems correct, the resolution seems very low to me and I'm wondering why the resolution dropped so significantly. The transformation I performing is some minor intrinsic/extrinsic corrections.
Here is the code used. The variable 'cameraParams' is obtained after successfully using the "camera calibration tool" from the "Computer Vision Toolbox v10.2". Both the raw image (.bmp) and the 'cameraParams.mat' are attached.
Thanks for the help.
[im_a, newOrigin] = undistortImage(imread(strcat(figlocation,fig_name)), cameraParams);
imagePoints = squeeze(cameraParams.ReprojectedPoints(:,:,end));
tf = fitgeotrans(imagePoints,cameraParams.WorldPoints,'projective');
[xf1,xf1_ref] = imwarp(im_a,tf,'cubic');
figure;imshow(im_a);title('image')
figure;imshow(im_b);title('transformed image')
