Is there a two-dimensional sinc interpolation software?
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Jaime De La Mota Sanchis
am 30 Sep. 2021
Beantwortet: Nikeet Pandit
am 10 Mai 2022
Hello everyone. I have found this package of software. I am interested in doing a two-dimensonal sinc interpolation as defined in the diapositives 15 to 18 of this presentation. Unfortunately. I haven't found anything.
Can anybody point me to some code that might work?
Best regards.
Jaime.
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Star Strider
am 30 Sep. 2021
One-dimensional sinc interplation is described in Ideal Bandlimited Interpolation. It may be possible to adapt it to a 2D problem.
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2 Kommentare
Matt J
am 30 Sep. 2021
Bearbeitet: Matt J
am 30 Sep. 2021
Yes, it is possible, but this is only valid for plaid upsampling, not arbitrary interpolation.
Image=double(imread('cameraman.tif'));
M=length(Image);
t=1:M;
dt=0.2;
ts = -M:dt:2*M;
[Ts,T] = ndgrid(ts,t);
A=sinc(Ts - T);
A([1:M/dt,end+1-M/dt:end],:)=[];
ImageInterpolated = A*Image*A.';
whos Image ImageInterpolated
imshow(ImageInterpolated,[])
Weitere Antworten (2)
Matt J
am 30 Sep. 2021
Since interpolation is commonly approximated by cubic spline interpolation, which you have an option for in interp2.
Vq = interp2(X,Y,V,Xq,Yq,'spline');
Nikeet Pandit
am 10 Mai 2022
We know that Fourier is a seperable transform... so if we want to do a Fourier 2D transform its equivalent to doing 1D transform on rows and then columns. I assume then this property holds for sinc interpolation... So I adapted the 1D example for sinc interpolation they provide on the sinc(x) documentation ... and then I applied the interpolation to the rows and then interpolation to the columns and it seemed to work
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