In Lightroom CC, I work with * .jpg files imported from a mobile phone (Samsung Gallaxy S9), not with RAW files.
I made changes in Lightroom and I export my images.
(Q) What quality should I use when exporting to keep the same quality as the original jpeg image?
My desire is not to introduce artifacts or decrease the quality or to significantly enlarge the file.
I would have thought Quality = 100 to get the best quality, but in some quick tests the file size has increased instead of staying roughly the same size as the original. I'm not sure what that means.
I looked for answers and found these links useful:
Does JPEG to JPEG export Lightroom reapplication compression? – request if an original image is of quality 80 and has been modified and re-exported, should the second export be "Quality 100" or "Quality 80".
Google search for
lightroom exporting jpg images what quality should I use?– Interesting article that explains lighroom export & # 39; s quality works in strips or 93 to 100% were identical, 85-92% were identical. Article so interesting, but it did not answer my question.
Google search for
Does jpeg file store the quality used when compressing it?but nothing useful appeared. If the JPEG standard stored the compression technique and the values used to generate the image, it might be possible to find the original compression used and use the same value when creating the file. jpeg exported.
What quality should I use for JPEG?says: In general, the quality 90 to 100% and more
high quality, 80-90% are
medium qualityand 70-80% is of low quality. Is perfectly logical (not!).
In my case, I'm dealing with images taken from a cellphone, so I'm not sure of the original "quality" of the JPEG image.