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Author Topic: how effective is uprezing?  (Read 5317 times)

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Greg Boiarsky

« on: September 23, 2006, 18:38 »
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I'm about to begin submitting to Alamy.  I have an EOS 10D, which is 6.3 megapixel and produces tiffs about 15 megabytes in size.  Alamy requires 48 megabytes.  I have found that I need to interpolate to roughly 5000 by 3300 pixels.

Will this pass QC at Alamy?  What uprezing routine do you use--bicubic, multistage bicubic, or Qimage (or something similar)?

Do interpolated photos sell well?


« Reply #1 on: September 23, 2006, 18:49 »
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Can't comment as to sales but all of my 10D images have been accepted. I've used both stair interpolation and bicubic.

« Reply #2 on: September 24, 2006, 01:15 »
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They sell. But I can't say I can't say whether they sell well or not. Nothing to compare with.

As for interpolation ... my camera produces images of about 17mb and I interpolate them up to just over Alamy's 48mb minimum using Phototshop 7. I'd advise you use ONLY the bicubic option (the other two are faster but give markedly inferior results) and do it in 10% steps as I believe that this gives even better results.

I've made this process into an 'action' on one of the F keys, so it's pretty much automated.

« Reply #3 on: September 24, 2006, 05:44 »
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i tested upsizing with both the step method and doing it in one step, and i can't say i noticed any difference.

I use bicubic smoother, ans that is meant for upsizing.  bicubic sharpen is meant for downsizing.

I also us a 10D so you shouldn't have any problems.

Greg Boiarsky

« Reply #4 on: September 24, 2006, 17:27 »
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Thanks, gang.  I'll use QImage to uprez.  My informal tests show that it produces sharper results even with sharpening turned off.

« Reply #5 on: September 24, 2006, 17:50 »
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I am quite confused about some agencies REQUIRING upsizing.  This seems to contradict good photo editing, since upsizing can degrade an image.

Does anyone understand the reasoning behind this?

« Reply #6 on: September 25, 2006, 01:50 »
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I am quite confused about some agencies REQUIRING upsizing.  This seems to contradict good photo editing, since upsizing can degrade an image.

Does anyone understand the reasoning behind this?

No idea ... ours not to reason why   ;)

« Reply #7 on: September 25, 2006, 07:06 »
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I am quite confused about some agencies REQUIRING upsizing.  This seems to contradict good photo editing, since upsizing can degrade an image.

Does anyone understand the reasoning behind this?

nope, dunno.  I think it is pretty silly as well.

« Reply #8 on: September 26, 2006, 08:30 »
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I'm about to begin submitting to Alamy.  I have an EOS 10D, which is 6.3 megapixel and produces tiffs about 15 megabytes in size.  Alamy requires 48 megabytes.  I have found that I need to interpolate to roughly 5000 by 3300 pixels.

Will this pass QC at Alamy?  What uprezing routine do you use--bicubic, multistage bicubic, or Qimage (or something similar)?

Do interpolated photos sell well?


TLR Image Resizer Action for Photoshop is your friend http://www.thelightsrightstudio.com/photoshop-tools.htm and best of all, it's free. It is a Godsend....I live by it!

« Reply #9 on: September 26, 2006, 09:22 »
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I am quite confused about some agencies REQUIRING upsizing. This seems to contradict good photo editing, since upsizing can degrade an image.

Does anyone understand the reasoning behind this?

nope, dunno. I think it is pretty silly as well.
YOu would think they would upsize it themselves (when/if needed) using the best software (they can afford it) rather than get us to do it. Like shutterstock does.


 

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