PHOTO:Wind turbine. PurpleFringing.OverProcessing

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Mak_photo
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Posted Sun Dec 16, 2012 8:19AM
Hey guys,


I uploaded this photograph

https://dl.dropbox.com/u/57670414/_MG_0639-Edit.jpg


and I got the following rejection reasons: 


This image appears to be over-filtered/over-processed which has affected the image quality. This may include Photoshop filters & effects (over-sharpening, excessive adjustments to levels, curves, contrast, hues, gaussian blurs, saturation, added textures, noise reduction...) or other manipulations. We feel the image would have more value to designers with minimal or no post processing effects so that the designers could add their own post-processing effects. Some images can benefit from minor touch-ups to grab the viewer?s attention and there is no definitive line to what editing makes or breaks a great image but the end result should be a single image that can still be molded into a design. Inspectors judge images based on quality, composition and usability. If you require further explanation regarding this rejection, please submit a ticket to Scout (http://www.istockphoto.com/contact_ticket.php)

For more information about iStock Standards, please visit:
http://www.istockphoto.com/tutorial_1.0_account.php

=============================

This file has unacceptable levels of chromatic aberration, also referred to as 'purple fringing' or could also be a red glow. This fringing is normally apparent around the edges of swift color shifts like dark colored leaves against a bright sky or reflective surfaces. If you require further explanation regarding this rejection, please submit a ticket to Scout (http://www.istockphoto.com/contact_ticket.php). For information about iStock lighting standards please see: 
http://www.istockphoto.com/article_view.php?ID=524


 


This was my work flow: I shoot in raw, I imported the picture to lightroom as DNG. the picture was extremely washed out so I pulled the blacks slider in lightroom to 39 and applied strong curves, clarity(+21) and vibrance(+41). Then I went to Photoshop and removed all the purple fringing that I could see. 


My question is where did I miss the remaining fringing? and what went wrong in my post processing that caused the rejection? did I push the blacks too high (the histrogram shows that I didnt lose any details in the shadows).


Thanks for your help!

(Edited on 2012-12-16 09:19:37 by kelvinjay)
esp_imaging
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Posted Sun Dec 16, 2012 8:49AM
It's too dark now. Ease back on the "strong curves", clarity and vibrance adjustments.

I can't see a problem with fringing / CA,
Mijau
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Posted Sun Dec 16, 2012 8:50AM

Looks underexposed to me, and it's noisy. Maby it's oversaturated. The noise may be an effect of overusing Lightroom sharpening???


Good luck.
kelvinjay
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Posted Sun Dec 16, 2012 9:22AM
Looks very noisy but I don't see any problematic CA. There is one blade with a bluish kind of line on it, but nothing that I'd say was enough to really warrant rejection.
Mak_photo
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Posted Sun Dec 16, 2012 9:56AM

thanks for the feedback.


@kelvinjay i used lightroom's noise reduction for the photograph that i uploaded. so should i do what @esp_imaging suggested? lower the curves, clarity and vibrance ? 


 
Mak_photo
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Posted Sun Dec 16, 2012 10:14AM
I reprocessed the photo....https://dl.dropbox.com/u/57670414/_MG_0639-Edit-2.jpg


will that work ?


thanks

(Edited on 2012-12-16 10:28:57 by kelvinjay)
kelvinjay
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Posted Sun Dec 16, 2012 10:28AM
You shot it at 100 ISO, so there should be little or no noise. It looks like your original attempts to process it exacerbated whatever noise there was but the 2nd edited version you just uploaded looks much cleaner.

There seems to be some oddness going on with the clouds near the bottom, maybe it's natural but there are a few weird lines that look like cloning mistakes. The fact that it's a very common subject (iStock has nearly 20,000 photos of wind turbines already), means I'd not expect it to sell much, but I think it looks broadly acceptable. If you can do anything to slightly reduce that pale blue line on the upper edges that is a bit CA like, that may be better.
itsskin
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Posted Sun Dec 16, 2012 3:08PM
Hi Mahmoud!

I took a liberty and reprocessed your second image like this in lightroom/ACR

https://dl.dropbox.com/u/17452116/iStock/_MG_0639-Edit-2-2.jpg

Be sure NOT to apply any sharpening to your image before adjustments, as it will introduce artifacts and limit your editing latitude.
Look at your pictures at 100% and at 10% and be sure you like them both
Mak_photo
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Posted Sun Dec 16, 2012 4:12PM

Hi Ilya!


Well your version of the photo looks WAAAY better . I'm using lightroom 3.4 and I was wondering how would the white and blacks slider translate to the old version? I'm still working on my postprocessing skills and getting better at understanding what is allowed and what is not. I never apply any sharpening to my photos in my workflow, even when I upload them to iStock is that a good strategy?


@kelvinjay: I relooked at the original DNG file that I have after reseting it and I still see noise in the sky is that normal? or is lightroom introducing noise when it converts the CR2 files to DNG files? 


Thanks!
Mak_photo
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Posted Sun Dec 16, 2012 4:28PM

so i tried to replicated what itsskin did.


https://dl.dropbox.com/u/57670414/_MG_0639-Edit.jpg


is this acceptable?
esp_imaging
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Posted Sun Dec 16, 2012 5:19PM
/
/You still have some weird lines, and cloning problems or something at the bottom of the shot.
Mak_photo
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Posted Sun Dec 16, 2012 5:26PM
i didnt do any cloning to the photo. I just removed two elements that were on the bottom left and right corners. what lines exactly ?
itsskin
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Posted Mon Dec 17, 2012 5:08AM

Posted By Mak2662:

Hi Ilya!


Well your version of the photo looks WAAAY better :). I'm using lightroom 3.4 and I was wondering how would the white and blacks slider translate to the old version? I'm still working on my postprocessing skills and getting better at understanding what is allowed and what is not. I never apply any sharpening to my photos in my workflow, even when I upload them to iStock is that a good strategy?


@kelvinjay: I relooked at the original DNG file that I have after reseting it and I still see noise in the sky is that normal? or is lightroom introducing noise when it converts the CR2 files to DNG files? 


Thanks! :)


There are many different ways to do similar things. In LR3 you can try bringing lights in tone curve to around 45, contrast +32, Clarity +35, Vibrance +20, Saturation -15.

Also note, that LR by default applies sharpening. Please set it to zero instead of +15.
esp_imaging
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Posted Mon Dec 17, 2012 5:20AM
Posted By Mak2662:
i didnt do any cloning to the photo. I just removed two elements that were on the bottom left and right corners. what lines exactly ?

There's a blue line a few pixels wide at the bottom of the shot below the cloud. Plus the blue streak in the cloud at the bottom immediately left of the pylon looks wierd.
kelvinjay
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Posted Mon Dec 17, 2012 5:34AM
These are the bits I was on about:

screen121217-123425
Mak_photo
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Posted Mon Dec 17, 2012 10:02AM

I'll try to fix those although I'm pretty sure those are natural.


Thanks a lot guys, your help was great!!


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