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How can I resample an image in matlab?

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bkshn il 15 Nov 2013
Modificato: bkshn il 16 Nov 2013
I want to resample an image in matlab. I use imresample code of by Omer Demirkaya. but I have bellow error.
  • | |Error using griddedInterpolantSample values must be a single or double array.
Error in interp2/makegriddedinterp (line 214) F = griddedInterpolant(varargin{:});
Error in interp2 (line 135) F = makegriddedinterp(X, Y, V, method,extrap);
Error in imresample (line 49) nimg(:,:,i) = interp2(Ox,Oy,img(:,:,i),Nx,Ny,intmethod);| | *
Could you help me how can I resample an image?
Thanks for your help.

Risposta accettata

Walter Roberson
Walter Roberson il 15 Nov 2013
Before you start the interpolation, do
img = im2double(img);
  3 Commenti
Walter Roberson
Walter Roberson il 15 Nov 2013
What happens instead of it "working" ?
bkshn il 16 Nov 2013
Modificato: bkshn il 16 Nov 2013
I found my answer thanks alot for your help

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Più risposte (2)

Image Analyst
Image Analyst il 15 Nov 2013
Why not simply use imresize()?

Alex Taylor
Alex Taylor il 15 Nov 2013
The MATLAB interpolation functions require that the inputs be floating point, since interpolation is a floating point operation. Walter's comment is accurate, if you want to interpolate in double precision floating point, im2double will work.
To Image Analyst's point: are you trying to apply a geometric transformation like scaling, rotating, or a generic affine transformation to an image? If so, it would be easier to look at imresize, imrotate, or imwarp if you have the Image Processing Toolbox. These will take care of the resampling for you.

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