Saving concatenated/ stitched elongated image file in high resolution

Question

Abdul Hannan 2024-3-8

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https://ww2.mathworks.cn/matlabcentral/answers/2092086-saving-concatenated-stitched-elongated-image-file-in-high-resolution

编辑： cui,xingxing 2024-4-27

Hi,

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.

imshow(img)
saveas(gcf,'Figure.png')

I have also tried another way

imshow(img)
fig = gcf;
set(fig, 'units', 'pixels');
set(fig, 'position',[0, 0, 700, 19000]);
set(fig, 'paperunits', 'points');
set(fig, 'paperposition', [0, 0, 700, 19000]);
saveas(fig,'Figure.png')

the img.mat file is 25 MB, but I am not able to save it properly and high resolution.

Need assisstance.

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Answer 1

DGM 2024-3-8

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https://ww2.mathworks.cn/matlabcentral/answers/2092086-saving-concatenated-stitched-elongated-image-file-in-high-resolution#answer_1422851

编辑：DGM 2024-3-8

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).

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Abdul Hannan 2024-3-9

imwrite() is better option thanks.

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Answer 2

cui,xingxing 2024-3-8

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/2092086-saving-concatenated-stitched-elongated-image-file-in-high-resolution#answer_1422796

编辑：cui,xingxing 2024-4-27

Hi,@Abdul Hannan

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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