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JPG files become obscured around and in between letters

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I'm editing sheet music.


After working with a JPG pic for a while in paint.net, 'clutter' begins to appear around the various letters and note objects.


Also, the letters and objects themselves become less well defined.


See example.  One is the original, the other has been worked on in paint.net.


Any way this can be avoided?



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This is a result of JPEG's lossy compression. Saving an image as JPEG, then loading/opening it again, and resaving it, will cause this sort of artifacting.


Using PNG, PDN, TIFF, TGA or BMP will avoid this because they use lossless compression.


If you must work with JPEG, make sure the Quality slider is set as high as possible when you're in the Save Configuration dialog.

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