RetouchPRO

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


RP Tutorials Discussion for tutorials published via our automated system, and about the tutorial publishing system itself.

Meta-images. Why and how.

Reply
 
Thread Tools
  #1  
Old 04-02-2004, 07:31 AM
Rexx's Avatar
Rexx Rexx is offline
Senior Member
 
Join Date: Jan 2004
Location: Norway
Posts: 177
Post Meta-images. Why and how.

This tutorial’s evil intent is to twist your mind into accepting the concept of meta-images. After the initial brainwash the really creative ones out there will definitely come up with some weird and ingenious uses of Blend modes Difference and Exclude and the Image>Calculations Add and Subtract options! :-)
This is all written for PS 7 or any compatible version.
[details]
Reply With Quote top
  #2  
Old 04-02-2004, 07:35 AM
Rexx's Avatar
Rexx Rexx is offline
Senior Member
 
Join Date: Jan 2004
Location: Norway
Posts: 177
Unhappy Sorry, no images yet

Image upload doesn't work from Firefox either. I will have to upload from my PC. Just wait a little bit... (It's no fun without the images, really)
Reply With Quote top
  #3  
Old 04-02-2004, 08:23 AM
Rexx's Avatar
Rexx Rexx is offline
Senior Member
 
Join Date: Jan 2004
Location: Norway
Posts: 177
Sorry, I give up
Reply With Quote top
  #4  
Old 04-02-2004, 10:00 AM
Leah's Avatar
Leah Leah is offline
Senior Member
 
Join Date: Aug 2002
Location: London, UK
Posts: 518
I've sent you a PM about this - let's hope we can get it sorted out as I know you have a keen audience on the edge of their collective seats!
Reply With Quote top
  #5  
Old 04-02-2004, 01:51 PM
Leah's Avatar
Leah Leah is offline
Senior Member
 
Join Date: Aug 2002
Location: London, UK
Posts: 518
OK everyone - Vegard's images are now attached to the tutorial. I will admit that on first reading it makes my brain hurt but there's a lot of useful food for thought in there. It must have taken forever to put together!
Reply With Quote top
  #6  
Old 04-02-2004, 02:25 PM
Rexx's Avatar
Rexx Rexx is offline
Senior Member
 
Join Date: Jan 2004
Location: Norway
Posts: 177
Thumbs down

Thank you Leah, that was incredibly helpful of you!

And you are right, it took me ages to write and research. It feels great to have finished

Now I am really really curious to see if any of this can be used for anything!
Reply With Quote top
  #7  
Old 04-03-2004, 07:39 AM
Flora's Avatar
Flora Flora is offline
Senior Member
 
Join Date: Mar 2002
Location: Milan, Italy
Posts: 2,325
Blog Entries: 3
Hi Vegard,

Wow....you've really done your research homework... didn't you!!!!! Thank you very much for taking the trouble to write it all down ....

You know I was one of the first in line "on the edge of my seat!" waiting for your Tutorial ....

.... But the only action I could successfully reproduce was the discovery of a previously saved 'hidden writing' on the picture .....

I must be really 'thick', but couldn't create an acceptable mask to use for a Noise reduction purpose (with or without the Calculations steps, which, I think, I followed religiously...)

The Mask I got, beside the edges, contained and kept all the noise of the picture, so, when I applied it, parts of the picture were blurred, and this was fine, but whatever was selected by the mask (the noise particularly) was even more evident than before as the rest of the picture was smoother .... Was I supposed to 'refine' the mask somehow? What did I do wrong?

I know you are going to hate me, but would it be possible to see a snapshot of the final mask you got and used?

Thank you very much in advance!

P.S. For my experiments I downloaded and used the same picture as you did......

Reply With Quote top
  #8  
Old 04-03-2004, 11:01 AM
Rexx's Avatar
Rexx Rexx is offline
Senior Member
 
Join Date: Jan 2004
Location: Norway
Posts: 177
Unhappy My apologies, Flora!

Oh no, Flora, I am so sorry!

While writing the tutorial, one of the sentences that fell victim to the Delete key was "This tutorial will not teach you how to beat Neat Image"! Truly!

When I finish my noise reduction action (remember it is 90% finished, and you know by now what that means...), I will write another tutorial on that, but that is far outside the scope of this one. It is really really difficult! I have written an action that performs beautifully on this test image, but doesn't work at all on another.

The action I had in mind when mentioning it briefly in the tutorial, was just a general one that does the tedious and boring work of doing an R, G and B Subtract.

You are right, if you create a mask from such a Subtract, you will also get all the noise unless you refine it. At the time being, I don't believe it is possible for anyone to do anything better than David Marsit's action, that I recommend in the tutorial. That would probably be a waste of time, which in my case is an "intended" waste of time I like learning.

You *may* get your mask to work better if you don't accept the entire mask. You should allow for some (2-5) levels of slack. That is, everything that is equal or "almost equal" gets blurred. That translates to creating a mask "from the histogram" where you don't include the left 2-5 levels. You can do this with Levels and/or Blend-If. Many operations, and another good reason for either writing an action or staying away from it.

So again, I am so sorry for misleading you. This tutorial is just trying to teach the basics. My noise reduction action is in fact not an action at all, but a JavaScript, and I still cannot compete with David Marsit's action. I produce a better sea than he does on this test image, but his sky is far superior to mine.

My best suggestion now is, if you want to learn about noise reduction, download his action and study it. Try to understand what it does. I don't! He does some very clever things there. But my approach is completely different from his. He uses the first one I mention, Find Edges and proceed from there. I use the other one, the one that is in the tutorial.

One important fact I have learnt about noise is that it doesn't look like I thought!

Otherwise, I actually had YOU (among others) in mind with reference to the creative ones out there! Can you find anything else than noise reduction to use this tutorial for? Some wild things? I am an analyst, not an artist

A PS on hidden text. The Conspiracy Theory gang believe al Quaida are sending secret messages hidden inside porn pictures. Some researchers said they had never found any. Hmmm...
Reply With Quote top
  #9  
Old 04-03-2004, 02:07 PM
Flora's Avatar
Flora Flora is offline
Senior Member
 
Join Date: Mar 2002
Location: Milan, Italy
Posts: 2,325
Blog Entries: 3
Hi Vegard,

I am thick! .... I took your tutorial to be 'an end in itself' instead of an open highway to other possibilities!!!!


Quote:
Originally Posted by Rexx
Can you find anything else than noise reduction to use this tutorial for? Some wild things?
I'll start experimenting with it .... mind you.... I'm still experimenting with Roger_ele's "Blend if" Tutorial which is also 'an open highway' .... but, up to now I've come up with nothing exciting!!!

Reply With Quote top
  #10  
Old 04-03-2004, 02:26 PM
Rexx's Avatar
Rexx Rexx is offline
Senior Member
 
Join Date: Jan 2004
Location: Norway
Posts: 177
Don't be silly! Of course you're not thick

Quote:
Originally Posted by Flora
I'll start experimenting with it .... mind you.... I'm still experimenting with Roger_ele's "Blend if" Tutorial which is also 'an open highway'
Now here is some fun over Easter...

If you take one of the "Raw masks" (potential mask material) that you have created with a meta-image technique and do a Blend-if on this mask with a black or white layer...

Blend-if is great fun!

Sigh, I wish I could come up with something useful like you do, instead of just fun and weird things to do with Photoshop
Reply With Quote top
Reply

  RetouchPRO > Technique > RP Tutorials


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



All times are GMT -6. The time now is 11:23 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