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Saving concatenated/ stitched elongated image file in high resolution

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Using 'vertcat' I have concatenated various images. Now how I can save this concatenated image, so its pixels remain good.
I am trying to save this but image is blurr and details are not visible.
I have also tried another way
fig = gcf;
set(fig, 'units', 'pixels');
set(fig, 'position',[0, 0, 700, 19000]);
set(fig, 'paperunits', 'points');
set(fig, 'paperposition', [0, 0, 700, 19000]);
the img.mat file is 25 MB, but I am not able to save it properly and high resolution.
Need assisstance.

Accepted Answer

DGM on 8 Mar 2024
Edited: DGM on 8 Mar 2024
Do not save images by taking screenshots of figures. No saveas(), no print(), no exportgraphics(). The result is a degraded, padded facsimile of the original. It's not the same thing.
If you have an image, save the image using imwrite(). If you care about image integrity, use a lossless format like TIFF or PNG (I see you already are).

More Answers (1)

cui,xingxing on 8 Mar 2024
Edited: cui,xingxing on 27 Apr 2024
Have not try with imwrite?
If it's a custom plot image,you can try use exportgraphics build-in function to solve your problem. And specify "Resolution " name-value to custom your resolutions.
Hope it help you!
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