问题
I have the following image:
I want to remove the fisheye lens distortion from this image, so I used the following code:
[X,map] = imread('Foam_Image.jpg'); % Read the indexed image
options = [size(X,1) size(X,2) 1]; % An array containing the columns, rows and exponent
tf = maketform('custom',2,2,[],... % Make the transformation structure
@fisheye_inverse,options);
newImage = imtransform(X,tf);
imshow(newImage); % show image
But I get the following error:
Error using imtransform>parse_inputs (line 438)
XData and YData could not be automatically determined. Try specifying XData and YData explicitly in the call to
IMTRANSFORM.
Error in imtransform (line 265)
args = parse_inputs(varargin{:});
I also used imwarp instead of imtransform, but I still get an error. Anyone has any idea why do I get this error and how to fix it?
回答1:
As the message says, you need to manually specify the XData and YData properties during the call to imtransform with the Name-Property arguments syntax.
According to the docs, XData for example is:
A two-element, real vector that, when combined with 'YData', specifies the spatial location of the output image B in the 2-D output space X-Y. The two elements of 'XData' give the x-coordinates (horizontal) of the first and last columns of B, respectively.
and likewise for YData. Therefore, you could modify your call to imtransform like so:
newImage = imtransform(X,tf,'XData',[1 col],'YData',[1 row]);
where col and row are the output of the size function you calculated earlier.
Hope that helps!
来源：https://stackoverflow.com/questions/31115164/error-in-removing-the-fisheye-lens-distortion-of-an-image-in-matlab