canyonblue17
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Oversharpened rejection without using sharpening tool?

Tue Sep 05, 2017 6:20 pm



I did not use the sharpening tool on this photo at all. I'm sure I threw in a little contrast, a little extra color, but the photo was clean and sharp from the beginning. Can basically raw photos come out of a 7-year-old camera with a 5-year-old lens oversharpened? Any help, or education, is always greatly appreciated.
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airkas1
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Re: Oversharpened rejection without using sharpening tool?

Tue Sep 05, 2017 6:49 pm

Can't view the image in the uploaded size when linked like that, so here is a better link for future references: http://imgproc.airliners.net/photos/air ... 0c74ac1768
That said, it looks ok to me.
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canyonblue17
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Re: Oversharpened rejection without using sharpening tool?

Tue Sep 05, 2017 7:18 pm

Thanks for the help as always. I will submit it through the Appeal process.
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airkas1
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Re: Oversharpened rejection without using sharpening tool?

Tue Sep 05, 2017 7:46 pm

I just saw in the appeal messages that it got rejected. I don't know what to say, it really doesn't look oversharpened to me :frown:
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canyonblue17
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Re: Oversharpened rejection without using sharpening tool?

Tue Sep 05, 2017 8:09 pm

Now photo is rejected for a completely different reason - underexposed??? If it was underexposed - why wasn't that included in the first rejection?
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canyonblue17
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Re: Oversharpened rejection without using sharpening tool?

Wed Sep 06, 2017 4:01 am

Is it common to have a photo rejected for one reason - then after having a head screener say it looks ok - to then have it rejected for a completely different reason? And have the screener add a personal note that only states "screener correct"? There is no explanation for the first rejection - and almost no explanation as to why a second rejection reason was added. I've been posting on this site for years and have never had this happen. What gives?
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airkas1
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Re: Oversharpened rejection without using sharpening tool?

Wed Sep 06, 2017 5:15 am

Unfortunately it's not that uncommon. The 'screener correct' comment refers to the oversharpened, the underexposed is explanatory enough not to warrant a further comment. Upon appeal, the entire image is judged again, not just the items that it was rejected for. That's why sometimes reasons are added/removed. The fact that underexposed wasn't mentioned before is either because the screener missed it or didn't think it's underexposed. My guess is the latter.

I still don't know what else to say, as the image is passable for me. The appeal HS thinks it's oversharpened and underexposed and another HS said oversharpened, high contrast and compression.
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Miguel1982
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Re: Oversharpened rejection without using sharpening tool?

Wed Sep 06, 2017 8:06 am

Replying - late, I know - to the original question. Yes, an image can be oversharpened even though no sharpening tool or technique was used.

This is due to the fact that a large size reduction occurs on post processing. In my case, images straight out from the camera measure 5300-something pixels on the larger side. Let's say that after the inevitable cropping we are at 5000 px. Once I resize it to 1200px, I have basically "merged" every four-five adjacent pixels into one. That, on high-contrasted edges, can result in jaggies.

Solutions? Either reduce the amount of sharpening that the camera applies or resize to larger sizes. Or both.

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jelpee
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Re: Oversharpened rejection without using sharpening tool?

Wed Sep 06, 2017 12:38 pm

I also find that it helps to resize in steps: I typically resize to 1600 pixels and then resize again to 1200 pixels. Not sure if there is any science behind it but it reduces the incidence of jaggies when resizing.

Jehan
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canyonblue17
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Re: Oversharpened rejection without using sharpening tool?

Wed Sep 06, 2017 3:47 pm

Thanks so much for the information and tips. My fear in reducing the in-camera sharpening is that it will lead to way more blurry results that can't be fixed with edit sharpening. It's a delicate balance. I will try the step-down size reduction though and see if that helps.

As far as the underexposed rejection. I'm still kind of surprised by that. There is plenty of light in the photo. The bottom of the aircraft is a little darker - because of the angle of the sun (almost directly above the aircraft) there was little way to avoid that. Any solutions or advice on that would be greatly appreciated - I had several rejections for underexposed when there appeared to be lots of light in the photo. Thanks again for everyone's input - you guys are how I went from the ultimate amateur - to someone who has been published in the New York Times and Wall Street Journal.
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Miguel1982
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Re: Oversharpened rejection without using sharpening tool?

Thu Sep 07, 2017 6:46 am

It might sound too obvious, but the only way to avoid that is not to shoot when the sun is overhead the aircraft, simple as that.

If that is not an option, you could lighten the shadows in post-processing, but be aware that it usually leads to flat, unnatural-looking shots and/or halos.

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