How to increase image size while keeping image sharp?

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Kevin
Kevin el 11 de Mayo de 2021
Comentada: Kevin el 11 de Mayo de 2021
Hi everyone,
This is a pretty general question. I took a screenshot of the MATLAB toolstrip (actually part of it).
It looks great except I want it bigger. So I use imresize( ),
B = imresize(A, 4);
but it looks pixelated.
Is there a better way to do this?
  2 comentarios
Jonas
Jonas el 11 de Mayo de 2021
did you try the imsharpen() function?
Kevin
Kevin el 11 de Mayo de 2021
Just try it out. Does not help (it does not make it worst).

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Respuestas (1)

Image Analyst
Image Analyst el 11 de Mayo de 2021
You need to use the nearest option:
B = imresize(A, 4, 'nearest');
  5 comentarios
Image Analyst
Image Analyst el 11 de Mayo de 2021
Yes, it can be, which is good for me because that's my whole career and it's good if people think it's hard because they are impressed with my work.
Post your original image if you want.
Kevin
Kevin el 11 de Mayo de 2021
Here is the mat-file that has the original image.
Actually I have also tried using IrfanView and this is what I did:
load tmp.mat
imshow(A)
% Select "Save As" and save the image as PNG file
Open the image in IrfanView and press + a few times to enlarge the image. The result is better than what I get in MATLAB. So there is a solution. What magic in IrfanView?

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