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06/29/2008 03:46:37 PM · #1 |
Recently I have started uploading some photos to istockphoto. Many of my images have been rejected for artifacting when the image is viewed at 100%. I'm wondering if there is anything I can do to either get rid of the artifacting, or if I'm doing something wrong while taking the picture. Here's an example.
The image was taken at f 2.8 with a shutter speed of 1/25 sec, and an ISO of 64. I have all my camera settings to the highest resolution...
Any help would be enormously appreciated. Thanks in advance! :) |
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06/29/2008 03:54:32 PM · #2 |
honestly i can't see anything wrong with this image, it's beautifully sharp (tho the focus is on the foot rather than its eye) and i don't see any artifacts at all.
maybe running it through neat image to remove a little background noise helps but otherwise i have no idea why it was rejected... |
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06/29/2008 04:04:19 PM · #3 |
another cool method to remove "artifacts" is by duplicating the background layer, set its blending mode to color, then run a slight gaussian blur (approx. 4-10%) on that layer (and maybe mask the subject so that it will only effect the oof background/foreground). works wonders sometimes.
hope that helps :) |
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06/29/2008 04:27:41 PM · #4 |
| I don't see any artifacting either. Perhaps a little image noise at full view on the blurry background, but nothing abnormal or excessive. If that's the problem, there are lots of software adjustments that can fix that. Damn good shot IMO. Razor sharp on the toad. Perhaps that's a generic excuse that they offer when they simply choose to reject it and need a reason that sounds good. If they reject this sort of stuff, then I am far away from being good enough to do stock. |
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06/29/2008 05:05:13 PM · #5 |
Magnify your iStock submissions to 200% and take a look. Sometimes you might well see clumping and noise. Mephisto's suggestion is good. Another suggestion is to reduce the image size. Doing so makes any noise harder to find. Most image sales tend to be of smaller sizes anyway. My 350XT had noise issues about ISO 400 and I had to use a lot of work-arounds and extra processing to deal with this problem. Now, with a 5D, I rarely do much processing to get images accepted at various agencies. I think the background bokeh areas tend to exacerbate the problem. I suspect the noise issue the iStock inspector sees here is in the out of focus background. Gentle gaussian blur will help - but it is difficult to hide the use of it.
Message edited by author 2008-06-29 21:07:21. |
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06/29/2008 05:51:41 PM · #6 |
I spent a LOT of time trying to find what they might have meant, and finally found a small example. Look at the eye, specifically at the horizontal yellow band across the top of the eye. In the lower portion of that band, there are 'square pixels' (jpg artifacts). Granted, this shot is gorgeous anyway...
Hope this helps. :)
Message edited by author 2008-06-29 21:52:32.
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06/30/2008 05:01:33 AM · #7 |
| Thanks you all very much for your helpful suggestions. I'll try them out and hopefully it will work! :) |
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06/30/2008 05:17:41 AM · #8 |
To stay away from artifacting, shoot RAW.
Shooting JPEG, then sharpening while in JPEG will give you artifacts.
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