07-03-2021, 07:53 AM
Quote:...Hello! I've found my images look better when I import an images resolution higher than 100 pix/in.
What is an optimal setting for importing an image to not lose quality?
What sort of file format are you importing ? It reads like it might be a PDF ? The ones that import with a ppi setting, a quick rundown.
A Portable Document Format something.pdf
The default is 100 ppi. It can be 100% vector like a svg and import any resolution, but when containing an embedded image not often above 300 ppi. When the pdf has embedded text rather than an embedded image, Gimp will render the text as good as possible for the chosen ppi. Best bet is 300 ppi.
PDF format is very much a 'finished' format not meant for editing. A PDF editor or a more general application such as LibreOffice Draw is preferred.
A Vector format filename.svg
You can safely adjust the resolution or the imported image size and the result is rendered to bitmap format in Gimp as good as it gets. Once inside Gimp the usual applies, any scaling up or down will degrade the image.
A Postscript Document: typically filename.eps
This is essentially a vector format but in Gimp acts more like a raster image. My experience is try-and-see, sometimes a high ppi looks a bit jaggy, all depends on the image. The application I use to create eps outputs at 200 ppi.