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.

Green Screen Extraction Technique

Thread Tools
Old 07-20-2011, 09:26 PM
juano juano is offline
Junior Member
Join Date: Jul 2011
Posts: 1
Green Screen Extraction Technique

Does anyone know of a technique of extracting people off a green screen by duplicating the green channel to create a channel mask.

I attached a screen grab of the channels panel as an example.

I was rummaging through some old files at work and came across this. Apparently it was done by a previous employee.

I am aware of changing the mode to Lab, duplicating the "a" channel and creating a channel mask from the duplicated "a" channel. I am also aware of using the mask panel and using "Color Range" along with "Decontaminate Colors" to create a layer mask.

I tried both of those techniques on this photo and neither of the masks were as good as the mask that was created by duplicating the green channel.

I have tried everything I can think of and I cannot figure out how to change a duplicate of the green channel into a channel mask.

Attached Images
File Type: png Picture 1.png (15.8 KB, 56 views)
Reply With Quote top
Old 07-20-2011, 10:23 PM
mistermonday's Avatar
mistermonday mistermonday is offline
Join Date: Dec 2005
Posts: 3,028
Re: Green Screen Extraction Technique

There are many ways that mask could have been created - manual selections, use of Apply Image command, use of the Calculations command, channel blending, Color Range Selection, Quick Select Tool, and the list goes on. However the choice of an efficient method depends to a large extent on the content of the image. If you can post the actual RGB image, you will likely get a number of good suggestions.
Regards, Murray
Reply With Quote top
Old 07-21-2011, 01:43 AM
pellepiano pellepiano is offline
Senior Member
Join Date: Aug 2004
Location: Stockholm, Sweden
Posts: 393
Re: Green Screen Extraction Technique

I use a Mac, but I just make a selection of the green channel ( Cmd+click on it , probably Cntrl+click o PC )) and then go back to the layer panel and add a layer mask ( this way the selection wil show directly in the layer mask ).
Reply With Quote top

  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
Netbook screen resolution too small for CS5 sylvia1065 Photoshop Help 17 01-23-2011 06:27 AM
Green Screen Compositing Techniques Sistere Photo Retouching 4 06-18-2010 08:56 PM
What do you think of Imacs GLOSS screen??? sponge03 Hardware 16 09-13-2009 04:18 PM
Green Screen Knockout Advice neoteck13 Photo Compositing 6 11-16-2007 07:33 AM
Green screen frame ??? maureeno Non-RetouchPRO Resources 13 06-12-2006 03:23 PM

All times are GMT -6. The time now is 05:29 AM.

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