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Wade H. Massie
08-09-2006, 07:50 PM
I had a couple of scanned night shots rejected today due to excessive noise, and I'm wondering what I can do to fix this. The rejected photos are:
http://www.railpictures.net/viewreject.php?id=276870
and
http://www.railpictures.net/viewreject.php?id=276879

On both shots I adjusted the levels on my scan software to darken the sky - I've noticed that not doing so can cause cause the darkest areas to have some red and green pixels. Also, the scanner was set to its highest resolution, 3200dpi.

I've had some luck scanning night shots before:
http://www.railpictures.net/viewphoto.php?id=151162
and
http://www.railpictures.net/viewphoto.php?id=154325

Thanks for any advice,

-Wade

Niles
08-09-2006, 11:27 PM
Since most of the problom is in the skys try this. It usally works for me. Cut around the sky then slightly blur just the sky. When I do that it seems to blend everything together. Let me know if this helps.

ericb
08-10-2006, 01:01 AM
Since most of the problom is in the skys try this. It usally works for me. Cut around the sky then slightly blur just the sky. When I do that it seems to blend everything together. Let me know if this helps.
To me it looks like the problem is excessive compression artifacts not noise. Make sure you pay attention to the compression settings when saving the image as a jpeg.

a231pacific
08-10-2006, 02:01 AM
Wade,

I asked a similar question a month ago on the Railroad Photography forum and received this helpful answer from "Switched Out."


Originally Posted by a231pacific
How do you remove noise?

Answer from "Switched Out" (Christine):
I use a plug in called "Noise Ninja" http://www.picturecode.com it is also available as a stand alone program. Another program that rates very high is "Neat Image" http://www.neatimage.com/ I tried them both before settling on Noise Ninja. I found that while Neat Image was easier to use then Noise Ninja the latter gave me better control.

Another program that is also available in standalone or plugin versions is "icorrect editlab pro" http://www.pictocolor.com/editlabpro.htm This program is brilliant at exposure and colour correction.

I have since downloaded the trial version of "Neat Image" and it does a great job with sky noise. I can only use it on the image after it has been resized for RP, since the trial version only works on 1024 X size images. I haven't decided whether to buy it yet, as CS2 does contain a noise reduction program and I'm considering upgrading from PS7 to CS2.

Give it a try, I think you will be impressed. And a big thank you to Christine!

Michael Allen

trainmonster
08-10-2006, 03:47 AM
Here is your shot done up with Neat Image. (Photoshop plugin) I also cropped the top, getting rid of the black band along the top. See what you think.

Does look like compression noise though.

Rich

Ween
08-10-2006, 03:49 AM
How do you make Neat Image run in PS?

trainmonster
08-10-2006, 06:34 AM
How do you make Neat Image run in PS?

Hafta have the registered version-comes in a stand-alone and plugin.

Rich

Switched out
08-10-2006, 06:37 AM
How do you make Neat Image run in PS?You need the "Plug-in Version" like the Home+ or the Pro+ versions according to the web site, the demo version does not work as a plug-in. Check out Plugin info (http://www.neatimage.com/ug5/H-Using-plug-in.htm)

Give it a try, I think you will be impressed. And a big thank you to Christine!Glad it was of some use Michael, I was wondering how you were getting on with it.
I had a couple of scanned night shots rejected today due to excessive noise, and I'm wondering what I can do to fix this.
Wade it looks to me as if the sharpening program you use has tried to sharpen the grain of the negative or slide. Try changing your work flow, reduce noise then sharpen.

Cheers,

Christine.

Wade H. Massie
08-10-2006, 01:18 PM
Thanks everyone for all of the helpful responses. Using gaussian blur on the sky, I was able to get my NS shot accepted: http://www.railpictures.net/viewphoto.php?id=154571

I'll scan the RF&P shot again, and I'll start by turning off the scan software's unsharp mask setting. If that doesn't work, I'll give Neat Image or Noise Ninja a try.

Thanks!

-Wade

a231pacific
08-10-2006, 03:48 PM
Actually the trial version does work as a plug in with PS7, at least it does for me! Just download the trial version and then go to filters in Photo Shop and it will be down at the bottom of the list.

The advantage of "Neat Imagae" is that you don't have to outline the sky, it simply builds a profile and bingo, the noise is gone! You do need an area of reasonably uniform image for it to work properly though.

Michael Allen