RetouchPRO

Go Back   RetouchPRO > Technique > Photo Restoration
Register Blogs FAQ Site Nav Search Today's Posts Mark Forums Read


Photo Restoration Repairing damaged photos

Purple marks on old slides

Reply
 
Thread Tools
  #1  
Old 01-13-2009, 03:56 PM
shedder shedder is offline
Junior Member
 
Join Date: Jan 2009
Location: Bristol, UK
Posts: 1
Purple marks on old slides

I've just joined this forum. Over the past year or so I've been digitizing my old negatives and slides, using A Nikon Coolscan V scanner, scanning to DNG format using Vuescan, and then editing using Photoshop CS3, finally saving as jpegs.

Recently I've started scanning some of my old slides (20-30 years old), and a significant number have blue/purple marks (mould?) on them, particularly in the darker areas of the slide. I've attached an example.

Can anyone suggest what I can do about this, either by way of treating/cleaning the slide, or some techniques I could use in photoshop?
Attached Images
File Type: jpg scan-090112-0009a.jpg (54.3 KB, 160 views)
Reply With Quote top
  #2  
Old 01-13-2009, 07:43 PM
mistermonday's Avatar
mistermonday mistermonday is offline
Moderator
Patron
 
Join Date: Dec 2005
Posts: 3,028
Re: Purple marks on old slides

That doesn't look like mold but then again I have never seen the likes of it on the thousands of slides that I have scanned. There are many of them so to minimize the effort, I would try the following:
Duplicate the background layer. Then Image>Apply Image and select either layer as the source, select the Red channel, blend mode normal, opacity 100%, OK. Change the blend mode of the layer (now grayscale) from normal to Luminosity. Add a blank layer on top with the blend mode set to Color. Choose a soft brush. Alt Click near a purple stain to sample the "good" color and now paint over all the purple dots. When you get to a different area like the red vest, take another color sample. You should be able to cover the image very quickly.
Depending on your image, sometimes the Green channel will be more even and show less of the purple spots so use it.
This scan is pretty small, noisy, and over pixelated, so I just shifted the level in the Blue channel.
Regards Murray
Attached Images
File Type: jpg Shedder Purple RevMM.jpg (165.6 KB, 62 views)
Reply With Quote top
  #3  
Old 01-13-2009, 11:23 PM
Dave.Cox's Avatar
Dave.Cox Dave.Cox is offline
Senior Member
 
Join Date: Feb 2007
Location: GrandPrairie.TX
Posts: 536
Re: Purple marks on old slides

I have seen something similar to this, but usually in the red channel and not the blue channel. It looks to me like some uneven fading of the pigments in the slide. Most of the damage seems to be in the blue channel. I did most of the repair by healing in the blue channel. I then added a levels adjustment layer to get rid of the blue cast.
Attached Images
File Type: jpg scan-090112-0009a2.jpg (36.3 KB, 59 views)
Reply With Quote top
  #4  
Old 01-14-2009, 01:17 AM
chillin's Avatar
chillin chillin is offline
Senior Member
 
Join Date: Sep 2006
Location: The Golden State
Posts: 1,324
Blog Entries: 1
Re: Purple marks on old slides

I used HSL + curves to get rid of the purple cast.
Healing brush took care of the bluish spots.
The difficult part was to clear the noise. I had to add noise couple of times with a darken & lighten blending, after that I've applied just a bit of noise ware.
Attached Images
File Type: jpg scan-090112-0009achillin.jpg (156.7 KB, 54 views)
Reply With Quote top
  #5  
Old 01-14-2009, 09:47 AM
Graphics23's Avatar
Graphics23 Graphics23 is offline
Senior Member
 
Join Date: Feb 2006
Location: Lynn, Massachusetts
Posts: 123
Re: Purple marks on old slides

I corrected this with three channel blends;

Green into Blue, Darken mode, 100%. Fixed spots and blue cast.
Red into Red, Linear Burn mode, 15%. Toned down clipped reds.
Green into Red, Darker Color mode, 30%. Improved detail in Red channel.

Then ran Reduce Noise filter. Very moderate settings.

Finished with an Exposure Adjustment layer set to lighten. Revealed just a little more detail in the shadows.

Regards,

Michael
Attached Images
File Type: jpg scan-090112-0009a-G23.jpg (90.6 KB, 63 views)
Reply With Quote top
Reply

  RetouchPRO > Technique > Photo Restoration


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is Off
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Cleaning Slides ? coraki History, Conservation, and Repair 10 10-04-2015 10:01 AM
Slides to CD bcarll Non-RetouchPRO Resources 13 05-02-2009 09:20 PM
Mold removal from old slides: one solution richardsullivan Photo Restoration 1 07-20-2008 12:51 AM
Scanning large Slides Stringbean Input/Output/Workflow 6 03-07-2008 11:12 PM
Photoshop, Lightroom, or Elements- lots of slides illinileo Software 7 01-22-2008 06:42 PM


All times are GMT -6. The time now is 12:59 PM.


Powered by vBulletin® Version 3.8.4
Copyright ©2000 - 2017, Jelsoft Enterprises Ltd.
SEO by vBSEO ©2011, Crawlability, Inc.
Copyright © 2016 Doug Nelson. All Rights Reserved