Step 3: Transform Image

This is final step to get geometrical correction of distorted image. imtransform can do that. Note that the choice of `XData' and `YData' values ensures the registered image will be aligned with the orthophoto.

im1  = imread('image1.bmp');
info = imfinfo('image1.bmp');
registered = imtransform(im1,t_concord,...
                         'XData',[1 info.Width], 'YData',[1 info.Height]);

You can do Step 1-4 once. After that, t_concord can be used repeatably.

The original source of this procedure is written by help of Image Processing Toolbox in MATLAB. Please look and check in detail as you like.