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imported jpeg photos with noise after unsharp mask in photoshop #1
mauro camorani's picture
by mauro camorani
September 29, 2013 - 3:38pm

Hallo, I am new and congratulations for this website.
I have this problem with Aperture (last update version). I have some photos in RAW/NEF format, I use Camera Raw for the main adjustment and then I use unsharp mask in photoshop for get sharpening. Photos are saved in jpeg max quality and I import the Jpeg files in Aperture. Here two problems: one, the worst, some pictures present a very huge noise. The second, if i don't have a noise problem, when I view this photos, for a few seconds photo looks good and sharp (I see loading… indicator). Then photos become blurry.
Now, if I export one of this photos or I view in Iphoto or in mac Preview, photo is very good. If I don't use unsharp mask (from photoshop), all is ok!!! I tried to import files directly in Iphoto and photos are good.
I think the problem is Aperture because if I print the picture it is correct, no noise, as I look in iPhoto! Same thing about the second problem. In Aperture picture looks blur but if I make a print, photo is perfect.
I have alredy repair permissions, database and rebuild the library. I have alredy try to re-import the photos and I have remove preference playlist and application support playlist as indicated by Apple.
I don't know solutions!!
Thank you.

Walter Rowe's picture
by Walter Rowe
September 30, 2013 - 10:22am

Check your Preview settings. You may have small previews being blown up greater than 100% when viewing full size in the viewer. Go under Preferences and set the preview size to unlimited, delete previews, and regenerate them. See if that makes them look more clear.

mauro camorani's picture
by mauro camorani
October 5, 2013 - 7:00pm

Yes I use the full size raw file. I use ACR because ACR is (for me) familiar. RGB file in ACR is the same than in Aperture. But, in ACR and then in photoshop I can use LAB mode to saturate color and I use unsharp mask in L channel. That, normally, does not create artifacts. Photos are then converted in RGB. As I wrote, final photos look like very good in iPhoto, preview, Lightroom or printed. In aperture, photos with unsharp mask are not good. If I use unsharp mask in RGB mode is the same. If I don’t use unsharp mask, problem does not exist. Setting in photoshop: unsharp mask factor 100 (from 50 to 200) radius 1 (max 2) and threshold 0 or more.
I opened a discussion inside Apple official community. You can see an example of the problem.
Thank a lot.

https://discussions.apple.com/thread/5382478

Walter Rowe's picture
by Walter Rowe
October 2, 2013 - 8:10am

+1 Butch. Good suggestion. I look forward to seeing Mauro’s response.

mauro camorani's picture
by mauro camorani
October 2, 2013 - 6:29pm

Yes, I use Camera Raw for the main adjustments. Then I use Photoshop for unsharp mask and the photos are then imported in Aperture. In ACR I see in blue Adobe RGB(1998) 16 bit, 2848 per 4288 (12,2 MP), 300 ppi.
Vertical photo

mauro camorani's picture
by mauro camorani
October 2, 2013 - 3:10am

Thank you, my preview settings are ok. I tried to delete and regenerate preview but the problems are not disappear. Problems appear only with photos with unsharp mask applied in photoshop.

Butch Miller's picture
by Butch Miller
October 2, 2013 - 4:58am

mauro - you say you are using Camera RAW for the main adjustments of the images in question, what resolution and pixel dimensions are you choosing for the image when you open it in Photoshop? … it should be shown in blue underlined text at the bottom of the ACR window.

If you are downsizing the images to any great degree, the resulting images after USM is applied may indeed show artifacts.

Walter Rowe's picture
by Walter Rowe
October 5, 2013 - 3:35am

Sounds like you are using the full size raw file. A larger or smaller size would include a “+” or “-” sign next to the MP number in parenthesis, indicating the number is larger or smaller than the “native” (original) size of the raw file.

Are you using ACR because you feel it produces a better RGB file than Aperture? Because you are used to the controls ACR provides?

Have you tried not using USM (unsharp mask) in Photoshop? I never use USM. I use Smart Sharpen instead. It provides better fine tuning and I think produces a nicer image.

Also, what values are you using for sharpening? Are you over sharpening your images? You might be seeing “halo” effects or other issues related to over sharpening.

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