How to get clean and high resolution images for figures

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Ameer Fahmi 2020-3-10

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回答： DGM 2021-7-29

I always save figures and graphs in form of JPEG, but it seems a bit foggy and its quality is not good enough to submit it for publication, what is the best option to get high quality images for figures and graphs in Matlab?

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Answer 1

John D'Errico 2020-3-10

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编辑：John D'Errico 2020-3-10

While it is true that a .jpg will not be what you want to achieve, there are better ways to save a file when your target is a high quality result.

I would suggest you do a read here:

https://www.mathworks.com/matlabcentral/answers/100349-how-do-i-print-my-figure-to-a-file-of-publication-quality

where you will see several suggestions offered.

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Answer 2

Image Analyst 2020-3-10

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I never use jpg if I can help it. PNG is better and pretty much the defacto standard these days. You can use PNG format in imwrite() to save the image in PNG format. Use getimage() or getframe() if you need to get the image with any associated graphics in the overlay.

And check your opengl options to avoid jaggy curves and lines.

Or you can use export_fig.

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Answer 3

DGM 2021-7-29

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I know everyone already mentioned it, but I feel the need to emphasize it whenever I can. Unless you understand what settings Matlab uses for JPG output, don't ever use it. If you're accustomed to accepting the compromises of the format when saving images in other applications, you're likely expecting way too much from Matlab.

When saving a figure or writing an image using imwrite(), the settings used for JPG output are 75% quality and 4:2:0 chroma subsampling. Even for a JPG, that's complete garbage quality, especially when you're saving the contents of a figure which is all hard edges and high contrast saturated colors.

Part of the reason why I'm compelled to comment about this is becase these parameter settings aren't clearly documented anywhere (at least not the chroma subsampling). That leaves a lot of people completely oblivious to the amount of damage they're doing to their own work.