RetouchPRO

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


Photo Retouching "Improving" photos, post-production, correction, etc.

Fix Color Image with Channels

Reply
 
Thread Tools
  #1  
Old 06-06-2012, 10:17 PM
nazca13's Avatar
nazca13 nazca13 is offline
Member
 
Join Date: Oct 2011
Location: miami
Posts: 68
Fix Color Image with Channels

If you know for example the blue channel has a lot of marks, how can you use the red and green to fix the blue while keeping the image color consistant. I don't want it black-and-white, but keep its color.

Or how could you exaggerate the garbage in the blue channel and use the green channel (best channel) to fix just those garbage areas.
Reply With Quote top
  #2  
Old 06-06-2012, 10:44 PM
chillin's Avatar
chillin chillin is offline
Senior Member
 
Join Date: Sep 2006
Location: The Golden State
Posts: 1,324
Blog Entries: 1
Re: Fix Color Image with Channels

Could you post a sample?
Reply With Quote top
  #3  
Old 06-07-2012, 07:16 AM
Indrasish Indrasish is offline
Junior Member
 
Join Date: Jun 2012
Location: India
Posts: 1
Re: Fix Color Image with Channels

Yes I agree, without a sample it is difficult to understand.
Reply With Quote top
  #4  
Old 06-07-2012, 09:23 AM
redcrown redcrown is offline
Member
 
Join Date: Jan 2006
Posts: 87
Re: Fix Color Image with Channels

I think you will find that editing the channels directly does not work. Doing so will introduce all kinds of wierd colors. So trying to "fix" the blue channel by cloning on it or copying portions from another channel is not productive.

The better way and more common way to fix "marks" in the image while preserving colors is with a technique called "frequency separation." Google that phrase for tons of examples and tutorials. Better yet, go to Youtube and search with that phrase. There are many examples there.
Reply With Quote top
  #5  
Old 06-07-2012, 12:18 PM
nazca13's Avatar
nazca13 nazca13 is offline
Member
 
Join Date: Oct 2011
Location: miami
Posts: 68
Re: Fix Color Image with Channels

Here is the original
Attached Images
File Type: jpg chris-baby-orig.jpg (86.5 KB, 74 views)
Reply With Quote top
  #6  
Old 06-07-2012, 12:22 PM
nazca13's Avatar
nazca13 nazca13 is offline
Member
 
Join Date: Oct 2011
Location: miami
Posts: 68
Re: Fix Color Image with Channels

Here is my work so far... curve adjustment first, followed by some spotting with healing brush and spot healing brush.

I tried the hue/sat and the selective color technique to reduce the yellow, but no luck.. I found out that it is actually more red than yellow, but at the same time the photo has the typical honeycomb texture applied. Couldn't see that at first until I zoomed in.

WIll follow advice on frequency... but maybe I am too much into this yellow type spots.. they are the leg, shirt, hair, and obvious face..

thank you
Attached Images
File Type: jpg chris-baby-after.jpg (88.1 KB, 67 views)
Reply With Quote top
  #7  
Old 06-07-2012, 01:44 PM
CKAJCA CKAJCA is offline
Member
 
Join Date: Jan 2009
Posts: 44
Re: Fix Color Image with Channels

First of all there is low contrast in the image so drag in the black and white points using levels adjustment. Then use the middle eyedropper of a curves adjustment layer and click on the white of the eye and that will get you very close to the correct colours. Use of the healing bush or spot healing will clean up the skin very quickly
Reply With Quote top
  #8  
Old 06-07-2012, 02:02 PM
nazca13's Avatar
nazca13 nazca13 is offline
Member
 
Join Date: Oct 2011
Location: miami
Posts: 68
Re: Fix Color Image with Channels

Your right... I tried the spatial frequency technique, increased contrast, and added some vibrance with a surface blur (for the honeycomb background).. here is the final photo.

The spatial frequency absolutely amazes me, because it took care of stains..now I have to learn more about this to understand how it actually worked.. cool..
Attached Images
File Type: jpg chris-baby-after-final.jpg (85.9 KB, 47 views)
Reply With Quote top
  #9  
Old 06-07-2012, 02:06 PM
CKAJCA CKAJCA is offline
Member
 
Join Date: Jan 2009
Posts: 44
Re: Fix Color Image with Channels

Quote:
Originally Posted by nazca13 View Post
Your right... I tried the spatial frequency technique, increased contrast, and added some vibrance with a surface blur (for the honeycomb background).. here is the final photo.

The spatial frequency absolutely amazes me, because it took care of stains..now I have to learn more about this to understand how it actually worked.. cool..
On my calibrated monitor the skin looks very magenta :-( mainly the face
Reply With Quote top
  #10  
Old 06-07-2012, 08:30 PM
Coriolanus Coriolanus is offline
Junior Member
 
Join Date: May 2012
Posts: 2
Re: Fix Color Image with Channels

You could try fixing the spots and color in Lab-mode.
Example (not spot on but to give an impression):
Attached Images
File Type: jpg nnn.jpg (98.0 KB, 33 views)
Reply With Quote top
Reply

  RetouchPRO > Technique > Photo Retouching


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
rgb cmyk channels kyleb Photo Compositing 8 09-10-2013 06:19 AM
How to fix that image? World War II karmelo Image Help 8 05-27-2012 01:33 PM
Please help to Fix closed eyes skajay Photo Retouching 10 01-03-2012 08:55 AM
Fix image with eyes shot Ycam1 Image Help 9 08-08-2011 02:28 PM
FS (what else) : where do you fix the color then? Aladdin Photo Retouching 7 02-22-2011 12:01 AM


All times are GMT -6. The time now is 04:59 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