RetouchPRO

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


Photo Compositing Collage, montage, masking, selections, combining, etc.

Masking a cloudy sky from complex subject

Reply
 
Thread Tools
  #1  
Old 04-20-2008, 06:40 PM
bestremera bestremera is offline
Member
 
Join Date: Apr 2006
Posts: 51
Masking a cloudy sky from complex subject

Hi,

I've included an image in which I'm trying to mask out the clouds.
I tried to include a copy of my results but the attachments button only let me manage my existing uploaded file and now upload a second image.

The problem is with masking a sky that has texture and a fairly wide tonal range (for clouds anyway) from a complex subject with many small and large openings that the clouds can be seen through.

I convert to black and white and dramatic skies are my personal holy grail.

My best attempt has gaps throughout the image.

Can someone give me a real detailed tutorial of how best to make this mask and accomplish my end result?

Thanks, Bob
Attached Images
File Type: jpg GWBoriginal.jpg (80.5 KB, 113 views)
Reply With Quote top
  #2  
Old 04-20-2008, 07:23 PM
ktg222 ktg222 is offline
Senior Member
 
Join Date: Oct 2007
Posts: 114
Re: Masking a cloudy sky from complex subject

Bob,

Is this what you are trying to achieve?

k
Attached Images
File Type: jpg GWBoriginal-F.jpg (55.4 KB, 105 views)
Reply With Quote top
  #3  
Old 04-20-2008, 07:40 PM
KR1156 KR1156 is offline
Senior Member
 
Join Date: Sep 2005
Location: outside of the box.
Posts: 628
Re: Masking a cloudy sky from complex subject

utilize the blue channel for your mask. do it.
Reply With Quote top
  #4  
Old 04-20-2008, 07:57 PM
bestremera bestremera is offline
Member
 
Join Date: Apr 2006
Posts: 51
Re: Masking a cloudy sky from complex subject

Yes to both or you.

I did use the blue channel. It had the most contrast.
But my mask wasn't complete, there were gaps along several of the vertical cables on the lower right and other areas.
KTG222, your mask is so tight, it's exactly what I want to achieve before I convert to b&w.

Once you find the correct channel, what are the steps I would use to 'utilize' it and make a proper, tight mask like yours?

Thanks again, Bob
Reply With Quote top
  #5  
Old 04-20-2008, 10:26 PM
mistermonday's Avatar
mistermonday mistermonday is offline
Moderator
Patron
 
Join Date: Dec 2005
Posts: 3,028
Re: Masking a cloudy sky from complex subject

Bob, if you have PS CS3 you can use the B&W Adjustment Layer without having to mask. There are two methods. The 1st is to just add the adj layer, place the eye dropper tool on the area of the sky which is Blue and then hold down the mouse / pen and drag the scrubby slider to the left to darken. Do the same to the white cloud to brighten it and add contrast.
If you would prefer to see what is happening in color before going to B&W, add the B&W adjustment layer with no adjustments (just click OK) and change the layer's blend mode to Luminosity. Then double click the adj layer icon to bring up the sliders. Use the eyedropper and scrubby sliders to build the contrast where you want it. When you are done, just change the blend mode of the adj layer back to Normal (or other blend mode).
Regards, Murray
Attached Images
File Type: jpg Bestremera MM1.jpg (133.4 KB, 59 views)
Reply With Quote top
  #6  
Old 04-20-2008, 10:45 PM
Kevin Connery's Avatar
Kevin Connery Kevin Connery is offline
Member
 
Join Date: Jun 2002
Location: Anaheim, CA
Posts: 82
Re: Masking a cloudy sky from complex subject

Another approach is to use non-RGB data.

I copied the file and converted to LAB mode.
Duplicated the B channel and increased 'contrast' in it
Inverted the channel, copied it, and pasted the copy in as a new layer.
Set the blending mode to Linear Dodge.
Boosted contrast with a small Curve tweak.
Convert back to RGB for the finishing up.

Even on this small JPEG, it maintained most of the details in the vertical cabling; on a larger file, much more contrast boosting could be done to get the major cables to black.

On the other hand, if you simply wanted a more dramatic sky and don't need a mask for another purpose, that's easily done without manual masking: use a contrast boosted and inverted B channel as a mask on a darkening Curves or Levels layer. Since only the blues will be affected, and the bridge and clouds don't have any blue, the sky gets more contrast.
Reply With Quote top
  #7  
Old 04-21-2008, 04:35 AM
bestremera bestremera is offline
Member
 
Join Date: Apr 2006
Posts: 51
Re: Masking a cloudy sky from complex subject

Thanks Kevin and Mistermonday,

I'll try both of those options.
By the way, I have CS2.

Bob
Reply With Quote top
Reply

  RetouchPRO > Technique > Photo Compositing


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
Fixing washed out sky gatorjack Photo Retouching 4 03-24-2008 05:02 PM
Any tricks or tips for masking hair? AliasAngel Photo Retouching 15 03-11-2008 05:52 PM
masking issues jadams007 Photo Retouching 6 11-27-2007 09:08 PM
Sky sky sky! vanormc Photo Retouching 3 10-31-2007 06:23 AM
picture from @ 1900 AtlanaAnna Photo Restoration 25 11-23-2005 04:28 PM


All times are GMT -6. The time now is 02:40 AM.


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