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PHOTO: 23550302: Potatoes: isolation rejection

Displaying 1 to 8 of 8 matches.
surajps
Member is a contributor and has less than 250 Photo downloads
Posted Tue Mar 26, 2013 10:20PM
Hello friends,

Many of my files has been rejected due to the following reason:
"The execution of isolation contains stray areas that are either too feathered or rough."
Honestly, I want to understand this reason technically- what does this mean and how to fix it.
The link to one of these rejected files is:
https://www.dropbox.com/sh/u9i38a6cxki6iis/Vxyr9c7Z_B/DSC_9538%23.jpg
https://www.dropbox.com/s/xfbmvh6vflknvj5/DSC_9538%23.jpg

(Edited on 2013-03-27 08:56:24 by surajps)

(Edited on 2013-03-27 12:52:16 by donald_gruener)
vandervelden
Member is a Diamond contributor and has 25,000 - 199,999 Photo downloadsMember is a contributor and has less than 250 Flash downloadsMember is a contributor and has less than 250 Illustration downloadsExclusive
Posted Wed Mar 27, 2013 2:49AM
You don't say what your workflow is to isolate the image - this would help to give us a clue to the cause of the problem.

When I look at the potatoes at 100% in Lightroom there are tiny speckles of colour all around the entire edge of the potatoes. Maybe that's the reason - although I don't imagine that these would show in print.

PS - Can you delete some of the acres of white space in your post?

(Edited on 2013-03-27 02:50:02 by vandervelden)
Difydave
Member is a Diamond contributor and has 25,000 - 199,999 Photo downloadsMember is a contributor and has less than 250 Flash downloadsMember is a contributor and has less than 250 Illustration downloadsExclusive
Posted Wed Mar 27, 2013 3:34AM

Looks to me as if the edge is quite sharp all round, it could do with being less sharp at the rear of the left potato where you can see the focus falls off. There is also a small amount of grey halo on the left potato, near where the edge meets the shadow underneath, and on the left potato where the two potato edges meet on the upper edge. There is also a sort of "web" where the edges meet there.


You are always going to have trouble isolating objects which are sitting directly on a background. It's far easier to get them off the background, light them appropriately, and blow out the background with another light or lights.
donald_gruener
Member is a Diamond contributor and has 25,000 - 199,999 Photo downloadsMember is a contributor and has less than 250 Flash downloadsMember is a contributor and has less than 250 Illustration downloadsExclusiveMember has had a submission accepted to the Designer SpotlightMember has had a File Of The WeekForum Moderator
Posted Wed Mar 27, 2013 12:51PM
Yes, this:


Posted By Difydave:

Looks to me as if the edge is quite sharp all round, it could do with being less sharp at the rear of the left potato where you can see the focus falls off. There is also a small amount of grey halo on the left potato, near where the edge meets the shadow underneath, and on the left potato where the two potato edges meet on the upper edge. There is also a sort of "web" where the edges meet there.


The edge is too sharp all the way around, and WAY too sharp where the potato is blurred by bokeh. The webbing is a definite problem.

The speckled gradient where the shadow fades to white also does not look natural, which is also part of what contributed to this rejection.
surajps
Member is a contributor and has less than 250 Photo downloads
Posted Thu Mar 28, 2013 12:36AM
Hi veterans,
Thanks a lot!! Studying your observations I got the point and accordingly retouched and dimished the size of the file. As I shoot raw, so getting back the original file is not an issue. Please examine it and say your opinion whether this time any possibility to have the file accepted with istock. the link for the retouched fil is:

https://www.dropbox.com/s/npbsm0duvv7hz1k/DSC_9538%23%23.jpg

To me, it is still a long way to cover in getting perfect isolation but I will practice, practice and practice.

(Edited on 2013-03-28 00:38:01 by surajps)

(Edited on 2013-03-28 09:16:29 by kelvinjay)
slobo
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Posted Thu Mar 28, 2013 8:56AM
it is improved but needs a little more feathering in out of focus areas.
donald_gruener
Member is a Diamond contributor and has 25,000 - 199,999 Photo downloadsMember is a contributor and has less than 250 Flash downloadsMember is a contributor and has less than 250 Illustration downloadsExclusiveMember has had a submission accepted to the Designer SpotlightMember has had a File Of The WeekForum Moderator
Posted Thu Mar 28, 2013 12:46PM
This is definitely better overall, and the shadow looks MUCH better.

I agree with slobo that the isolation is still too hard on the rearmost edge of the large potato, which is more out of focus than that edge appears.

There is still a bit of "webbing" between the two potatoes.
surajps
Member is a contributor and has less than 250 Photo downloads
Posted Fri Mar 29, 2013 11:12AM
Thanks Slobo and Donald! With your review I have now a much cleaner figure about appropriate feathering and hardness of edge in  isolated images.


Hope, with practice I will go nearer and nearer to the perfection. Thank you very much again for the priceless support you rendered to me!

(Edited on 2013-03-29 11:13:47 by surajps)
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