Image interpolation with a sample image

I am trying out image interpolation on Matlab, with the following sample image.

I'm not exactly sure why my code isn't working.

%Interpolation

figure
imagesc(V);
colormap gray;
axis image;
axis off;
title("Original");

grayImage = rgb2gray(V);

Vn = interp2(grayImage,3);

imagesc(Vn);
title("Modified");

Answer 1

[Image Analyst]

Try using imresize() instead of interp2().

[nika mong]

Hello, dear ser, I have problems writing code, which method can increase the resolution of a sub-pixel offset image, can you help please

[Image Analyst]

nika, I don't know what that is. To learn MATLAB, try MATLAB Academy - free 2 hour training.

Answer 2

[Vipresh Gangwal]

what do you mean it is not working? Also there seems to be a lot of salt and pepper noise in your image . That might be impacting the interpolation.

There is an example on the interp2 doc page. Try replicating same steps for your data.

https://www.mathworks.com/help/matlab/ref/interp2.html

[MX Zhang]

I did try the sample on the link. Here's my code:

figure
imagesc(cdata);
colormap gray;
axis image;
axis off;
title("Original");

%grayImage = rgb2gray(V);

%Vn = interp2(grayImage,3);

Vn = interp2(cdata);

imagesc(Vn);
title("Modified");

But I get an error when I perform it:

Error using  .' 
Transpose on ND array is not defined. Use PERMUTE instead.

Error in interp2 (line 96)
    V = V.';

Error in Interpolation (line 14)
Vn = interp2(cdata);

[Image Analyst]

cdata is a color image, which is a 3-D image. You can't use interp2() on a color image.

Any reason why you didn't like my solution?