Help with first scan


Posted by moose henderson on Mon Dec 27, 2004 10:56 pm

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Requesting help, this is my first digital scan with a Nikon Coolscan IV; shot on Velvia. Scanned at 12 bit, 30% brightness added, no sharpening, no other adjustments during scan. Within PS CS, applied curves and USM only. What are your impressions of the scan, what could I have done to improve the scan.

On the light table, it is tack sharp. The final web output looks a little soft, the eye does not appear tack sharp on the web output
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by E.J. Peiker on Mon Dec 27, 2004 11:16 pm
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It looks good on this end - a little selective USM on the bird's head is perhaps needed but that has nothing to do with the scan
 

by Mike Wilson on Mon Dec 27, 2004 11:22 pm
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The scan looks fine. More USM as EJ said and maybe lighten it up some in the midtones to bring out more detail in the perch. I use the same scanner and usually have to take out some of the blue which I cools the colors down a bit. Great image.
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by moose henderson on Mon Dec 27, 2004 11:25 pm
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Mike Wilson wrote:The scan looks fine. More USM as EJ said and maybe lighten it up some in the midtones to bring out more detail in the perch. I use the same scanner and usually have to take out some of the blue which I cools the colors down a bit. Great image.
Thanks Mike and EJ, I understand how to do selective USM on the head, how do you lighten up the midtones-would you use curves-if so I know how to do that. I assume you would do the midtones and the USM in PS, not during the scan?
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by Mike Wilson on Mon Dec 27, 2004 11:29 pm
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john j. henderson wrote:how do you lighten up the midtones-would you use curves-if so I know how to do that. I assume you would do the midtones and the USM in PS, not during the scan?
You can either use curves or levels. When using levels, move the middle(midtone) slider to lighten or darken the midtone values. I would do everything in PS and not do any sharpening or brightness changes with the scanning software.
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by moose henderson on Mon Dec 27, 2004 11:39 pm
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Mike Wilson wrote:
john j. henderson wrote:how do you lighten up the midtones-would you use curves-if so I know how to do that. I assume you would do the midtones and the USM in PS, not during the scan?
You can either use curves or levels. When using levels, move the middle(midtone) slider to lighten or darken the midtone values. I would do everything in PS and not do any sharpening or brightness changes with the scanning software.
Thanks Mike, so lighten the whole image another 1/2 stop or so. The original slide was fairly dark but I shot it dark to save the whites. The exposure latitude of the film must be fairly shallow because it was only 1.0 hrs after sunrise and it was not overly bright or contrasty. When looking at the histogram in Nikon Scan, it cover the whole range from 1-255 with most of the peak at the low end but sufficient data in the 1-10 range of whites.
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by KK Hui on Mon Dec 27, 2004 11:52 pm
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You are getting some good advices from Mike already ...
I too would leave all the manipulation in PS after the scan, John. :roll:
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by Michael Dossett on Tue Dec 28, 2004 1:33 am
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I read somewhere to do most adjustments of color in the scan preview before scanning, but I'm not sure where now. In any event, I use the same scanner and I tend to use the Nikon Scan software to adjust the curves and levels slightly before I scan (Photoshop allows you to import with Nikon Scan as your TWAIN source). I suppose it doesn't make a huge difference although if you do this, you will see that you can make further more fine adjustments after the scan. I tend to prefer the results with this method (adjusting prior to scan and fine tuning post-scan) but I'm sure it can be done either way.
 

by AForns on Tue Dec 28, 2004 8:29 am
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Looks good from my end John !!! You can also use plug-ins that allow selective sharpening !!!

btw is that at the Venice Rookery? That bird looks familiar 8)
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by moose henderson on Tue Dec 28, 2004 8:38 am
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AForns wrote:Looks good from my end John !!! You can also use plug-ins that allow selective sharpening !!!

btw is that at the Venice Rookery? That bird looks familiar 8)
yes, it is venice about 10 days ago.

what plug-ins allow selective sharpening? I have used NIK and PS USM
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by Alan Murphy on Tue Dec 28, 2004 8:57 am
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John, scans never reproduce the sharpness that's on the slide and they tend to muddy up the darks. Other than sharpening this up a bit, you could run this through the shadow recovery filter to bring out more detail in the blacks. It's a nice shot.
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by moose henderson on Tue Dec 28, 2004 9:02 am
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Alan Murphy wrote:John, scans never reproduce the sharpness that's on the slide and they tend to muddy up the darks. Other than sharpening this up a bit, you could run this through the shadow recovery filter to bring out more detail in the blacks. It's a nice shot.
Alan, what is a shadow recovery filter
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by Cliff Beittel on Tue Dec 28, 2004 9:02 am
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I would try to do as much adjustment as possible within the NikonScan software--that way you start with all your pixels intact in Photoshop (where any adjustment you make is discarding pixels). Rather than make significant changes at the preview level, I do most adjustments after the scan is finished, but before saving the file, which allows me to see the results at a 100% view. Here, I suspect you might benefit from an S curve--i.e., fix a midpoint (not necessarily the midpoint), then pull the bottom half of the curve to the left (brightening the dark areas of the image). That will take the top half of the curve to the right (i.e., darken the whites). That probably isn't necessary here, so you might want to lock down the top of the curve before pulling the bottom half to the left. Velvia is famous for going dark very quickly with underexposure.
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by Alan Murphy on Tue Dec 28, 2004 9:07 am
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john j. henderson wrote: Alan, what is a shadow recovery filter
John, in PS CS, if you go to Image>Adjustments>Shadow/Highlight. Play with the sliders until you like what you see.
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by moose henderson on Tue Dec 28, 2004 9:11 am
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Alan, thanks-I have used the shadow/highlight tool before, just never knew it was a filter
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by AForns on Tue Dec 28, 2004 10:37 am
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John Photokit Sharpener will allow selective sharpening. It is a very sophisticated program with lots of features. You can find a review in the Luminous Landscape http://www.luminous-landscape.com/revie ... ener.shtml
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