image resampling to modify mesh

Federico Paolucci

2022 12 17

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hello,

I would like some advice on this: I have an image characterized by a rectangular mesh and I would like to convert it to a square mesh by resampling.

Thanks for your suggestions

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DGM 2022-12-17

编辑：DGM 2022-12-17

在 MATLAB Online 中打开

That's awfully vague. An example of the expected inputs and outputs would help. Otherwise, all I can suggest is imresize().

% a "rectangular mesh"

sz = [101 301];

A = zeros(sz);

A(:,1:20:sz(2)) = 1;

A(1:10:sz(1),:) = 1;

% show it

% the cells are rectangular, so is the image.

imshow(A)

% resize it

B = imresize(A,sz.*[2 1],'nearest');

% show it

% the cells are square, but the image is rectangular

imshow(B)

% resize it

C = imresize(A,sz(2).*[1 1],'nearest');

% show it

% the image is square, but the cells are rectangular

imshow(C)

Federico Paolucci 2022-12-17

编辑：Federico Paolucci 2022-12-17

ok, in particular I'm going to have as input A{i,1}, in which we have a column and a number i (from 1 to 100) of rows. I will therefore have a 100X1 cell, in which each "box" corresponds to a rectangular image, in fact for example the second corresponds to 206x1280, the second 204x1280 and so on. what I should do is convert from pixel to mm and resample the mesh, which characterizes each image, passing x=0.1, y=0.075 to x=0.1,y=0.1 (the mesh is composed by pixels). for this i think to use "griddata".

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