https://en.wikipedia.org/wiki/Lossless_compression#Graphics

Just use PNG :-D

On Sun, Oct 29, 2017 at 9:50 AM, Michael <bmike1@gmail.com> wrote:
What are the lossless formats?

On Oct 29, 2017 12:01 PM, "Brien Dieterle" <briend@gmail.com> wrote:
Yeah, even if your original image is jpg you need to save/export to a lossless format after editing unless you are ok with some quality loss

On Oct 29, 2017 8:57 AM, "Michael" <bmike1@gmail.com> wrote:
 you mean what I export to in darktable?

On Oct 29, 2017 11:43, "Brien Dieterle" <briend@gmail.com> wrote:
Use a lossless format, such as png

On Oct 29, 2017 7:25 AM, "Michael" <bmike1@gmail.com> wrote:
I was just moding a photo in darktable and zoomed in and found something that I didn't want visible. so I finished the dt edits and exported to jpg and opened it in gimp. I zoomed in to blur the items.... and I practically didn't have to do anything! the pixels were were all big and ugly after I zoomed in.
--
:-)~MIKE~(-:

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