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Changed jpegs in camera raw but not changed.

Apr 24, 2012 9:58 PM

Does one have to run a batch on these? When I open them in preview, they are not adjusted or changed, even though they were altered in camera raw. thanks.

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    Apr 24, 2012 10:35 PM   in reply to kevin4545

    Uh huh...when you open the images in Camera Raw and saved the adjustments, all you saved was Camera Raw metadata (which Preview can't parse). If you want the JPEG images to reflect the parametric adjustments, yes, you must actually process the files and bake those adjustments into the file.

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    Apr 25, 2012 3:32 PM   in reply to kevin4545

    kevin4545 wrote:


    …I wonder does that degrades the jpeg if I start with a jpeg, change look in ACR and then use image processor to make 10 quality jpegs?


    Yes, it does.  Every time you save or re-save and close a JPEG, it gets degraded.

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  • Noel Carboni
    23,479 posts
    Dec 23, 2006
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    Apr 25, 2012 6:42 PM   in reply to kevin4545

    If you must start with a JPEG, make changes, and save a JPEG there's no getting around compressing the image data twice.


    Most folks can't see a difference when it's done once, but the degradation, especially around sharp bright/dark edges, will add up if done over and over.



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