Sponsor Message:
Aviation Photography Forum
My Starred Topics | Profile | New Topic | Forum Index | Help | Search 
Grain Reduction  
User currently offlineNicolaki From , joined Dec 1969, posts, RR:
Posted (15 years 8 months 2 weeks 3 days 18 hours ago) and read 1321 times:

Howdy everyone!
I would like to know is there anything possible to do to reduce the grain of a photo after having scanned it, preferably with Paint Shop Pro or Photoshop?

Nicolas Bourbillon

6 replies: All unread, jump to last
User currently offlineCkw From UK - England, joined Aug 2010, 813 posts, RR: 12
Reply 1, posted (15 years 8 months 2 weeks 3 days 15 hours ago) and read 1172 times:

Probably not without a trade-off in other respects - sometimes smoothing helps (particularly in sky areas) but this will reduce the apparent sharpeness of other areas.

The question is why are you getting problem grain in the first place? Even 400 ASA (with decent film!) - if properly exposed should not produce offensive grain. Grain is usually only a problem if the image is underexposed.

If you have an even slightly underexpsoed image and you try and compensate during scanning, you will increase the problem. Instead, try making the initial scan true to the original (ie. slightly underexposed) and then adjusting the scanned image using "tone curve" in photoshop.

Another trick which might work - scan the image at a high resolution (much higher than required) and then in photoshop resample the image down to the required size, followed by application of unsharp mask.



Colin K. Work, Pixstel
User currently offlineUSAir_757 From United States of America, joined Jun 2000, 996 posts, RR: 8
Reply 2, posted (15 years 8 months 2 weeks 3 days 10 hours ago) and read 1151 times:


Paint Shop Pro 7 beta has a grain reduction feature.

Click for large version
Click here for full size photo!

Photo © C. Wassell

C. Wassell

-Cullen Wassell @ MLI | Pentax K5 + DA18-55WR + Sigma 70-300 DL Macro Super
User currently offlineFastGlass From United States of America, joined Jan 2002, 0 posts, RR: 4
Reply 3, posted (15 years 8 months 2 weeks 3 days 2 hours ago) and read 1147 times:

If you have grain, I hope it is AFTER you have altered the scan (as in sharpening). IF you have grain after a RAW scan, you will have a tough time softening the scan without losing sharp details.

User currently offlineTomH From United States of America, joined May 1999, 960 posts, RR: 2
Reply 4, posted (15 years 8 months 1 week 1 day 7 hours ago) and read 1102 times:

A few of my older B&W negs had objectionable grain, most noticeable in the sky portion of the photo. What works for me in reducing the grain is to manually draw a mask around the sky. I do this by zooming in and meticulously tracing around the subject aircraft and any other objects so they aren't affected by the next step. Then I apply a softening blur to the masked area. Be sure to experiment so the softening doesn't smooth out desirable objects in the sky-like clouds. Do this after your final sharpening/unsharpening.

You shouldn't have to do this often, so if you are constantly plagued by graininess, you need to find the root cause. Good luck.

User currently offlineChris28_17 From United States of America, joined Jul 2000, 1439 posts, RR: 9
Reply 5, posted (15 years 8 months 1 week 1 day 4 hours ago) and read 1093 times:

hey tom! thats exactly how i fixed this picture... sorry i havent learned to actually post the picture but here is a link, check it out...



User currently offlineTomH From United States of America, joined May 1999, 960 posts, RR: 2
Reply 6, posted (15 years 8 months 1 week 9 hours ago) and read 1078 times:

Dramatic sihouette effect you got there Chris. I sure don't see any grain anywhere, either. Nice job-almost as good as B&W !!!!!!

Top Of Page
Forum Index

This topic is archived and can not be replied to any more.

Printer friendly format

Similar topics:More similar topics...
Guidance On A Grain Rejection Please posted Sun Aug 20 2006 11:51:51 by Garry
Best Way To Reduce Grain In This Case Is..... posted Mon Jun 5 2006 05:50:26 by Flamedude707
RAW Shooter/ Noise Reduction posted Tue Mar 14 2006 15:01:05 by Dendrobatid
Is Image Stabaliser/Vibration Reduction Any Good? posted Tue Dec 21 2004 16:13:18 by Speedbird128
Advanced Noise Reduction And Sharpening posted Tue Oct 12 2004 03:43:55 by Futterman
Reducing Grain With Photoshop posted Thu Jun 17 2004 09:38:06 by F4wso
Difference Between Grain And Noise? posted Fri Mar 26 2004 05:19:28 by MartinairYYZ
PS Noise Reduction Trick posted Fri Mar 26 2004 00:26:30 by Ckw
Photoshop CS Noise Reduction posted Sun Mar 21 2004 20:29:17 by ExitRow
Eliminating Grain On Scans posted Wed Jan 1 2003 01:36:21 by Serge