JPEG: Non destructive handling or Re-Compression again?

hghoyer

• June 12, 2022 12:39

with my fuji i mostly prefere JPEG. Its so nice to have the picture out of the cam.

If i just want to crop a picture a little bit: Whts the Workflow in Capture One with JPEGS?

How does C1 handle this case: Is there a Re-Compression and the JPEG Quality goes down?

Or is the EXPORT without re-compression?

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  Ian Wilson

  • June 12, 2022 13:05

  

  The crop you apply to a JPG in Capture One is non-destructive - Capture One does not alter an original file whether it is raw, TIF, or JPG. If you want a cropped JPG, you will indeed have to export, and you will get a JPG generated by Capture One that bakes in your crop (and if you have made any adjustments, perhaps to brightness, or to remove dust spots, our whatever, those as well). You will get the highest quality using the quality slider at 100, but whether you need that rather depends on what you want the output file for. You might want it for a print, but you are unlikely to need it for an image you want to post on a website. And because the adjustments to the original JPG were non-destructive, you still have that, and you can always generate a different version of the output another time for a different purpose.

  Ian

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  hghoyer

  • June 12, 2022 14:11

  Thanks. And no, I meant more: By re-exporting the image, the image is compressed again... That means it has significantly more compression artifacts... And details may be lost. Right?

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  Ian Wilson

  • June 12, 2022 18:25

  

  Well if you export it at 100 quality, I would have thought that additional artefacts would be minimised. The question is, can you see them? If you can't, there is no need to worry. 

  And if you were to crop the image in a destructive editor, and save it as cropped, don't you run into the same issue anyway? My understanding is that you lose quality in a JPG every time you re-save it.

  Ian

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  SFA

  • June 15, 2022 14:43

  If you re-edit you already cropped jpg version you would lose some pixels. You have already cropped some out and then compressed the data to get the jpg.

  So long as you are not overwriting your original file the best option would be to go back to the out-of-camera jpg and make additional changes there. That way maximum detail is retained from the jpg.

  Of course the RAW file would offer more flexibility by offering a lot more data but that is a different discussion.

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