Go Back   RetouchPRO > Tools > Software
Register Blogs FAQ Site Nav Search Today's Posts Mark Forums Read

Software Photoshop, Lightroom, Paintshop Pro, Painter, etc., and all their various plugins. Of course, you can also discuss all other programs, as well.

Craig's painting with 2d thingies

Thread Tools
Old 03-07-2006, 11:30 PM
Stroker's Avatar
Stroker Stroker is offline
Senior Member
Join Date: Jan 2005
Posts: 370
Craig's painting with 2d thingies

Two simple little filters.
2D Histogram
2D Remap

I originally did those so I could define certain things on my own terms. I can quickly and visually define mid-tones based on any 2 criteria that I want in a way that is truly 2 dimensional. Mostly greyscale masks for making adjustments. Then several things happened and I started to discover more uses.

One unexpected use is extracting. This use is mostly unexplored by myself because it's a bit too hit-or-miss for my tastes. If this were turned into a real-time paint engine, I'm sure this would be uber for extracting in some cases.

First, we have Graig's photograph. Not easy to extract the green painting based on colour values. Why? Because the green in the painting has some yellow and the hat has some yellow/green. Not to mention the yellow in the frame. There is some nasty over-lapping that just plain sucks.

Then we have the photograph after running 2D Histogram. In that, the axis are Green x Yellow. Now, the various hues in 2D Histo are not complete hues. For example, red isn't just red, but also yellow and magenta. It's a straight single channel operation with no ChOps. Also, the CMYK channels do not do the ICC thing (or whatever it's called). With that in mind, just Green x Yellow with a touch of Levels to brighten it up.

Then we have some quick painting. I chose some random, pure colours and painted the major white blobs. One of these distribution blobs has got to be the painting - it's just a matter of figuring out which one. After some quick-n-sleazy painting, I saved it out as a 24-bit (8-bit per channel, 3 channels) bitmap. Yeah, low-tech bitmap, but it's all I got right now.

Back to the original photograph, 2D Remap, used Green x Yellow, and loaded the saved bitmap. What I end up with is uber low-tech segmentation.

The distribution blob that I painted pure green is the blob that I'm after (serendipity). With a little more refining and some frustrating hit-or-miss, I'm sure the green painting could be masked out. Rather, a suitable greyscale mask can be made and then masked out.

Potential in this case? Sure. But I'll leave it to you to pursue it.
Attached Images
File Type: jpg greenhat02.jpg (67.8 KB, 38 views)
Reply With Quote top
Old 03-10-2006, 10:51 PM
Craig Walters's Avatar
Craig Walters Craig Walters is offline
Senior Member
Join Date: Apr 2005
Location: somewhere over there
Posts: 8,786
Blog Entries: 4

in my unending quest for plugins, i ran across this one which is somewhat like what i'm looking for. this one only erases black or white but does allow for color tinting as well. what i want is to erase color as well in a similar manner. it's the Cybia Alphaworks plugin.

this one looks like he might have been headed in the direction i want to go, but that he didnt really tie the colors into the erasure part, only the black and whites.

i'd post an image but erased parts wouldnt show. it's a free plugin.

Reply With Quote top
Old 03-11-2006, 08:24 AM
lkroll's Avatar
lkroll lkroll is offline
Senior Member
Join Date: Jan 2005
Location: Alabama
Posts: 4,685
Is this what you are trying to achieve?

Hey Stroker,

I did this in GIMP using an Invert Light Script-fu. This is easily achieved in PS too if you download Flaming Pear's Tachyon filter (free).
Attached Images
File Type: jpg greenhat02.jpg (26.6 KB, 10 views)
Reply With Quote top

  RetouchPRO > Tools > Software

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
Smudge Painting Tips pstewart Photo-Based Art 16 09-18-2009 01:27 PM
Deep Paint 2.0: Make your Photoshop Image look like a REAL Oil Painting Photomaster Photo-Based Art 28 07-29-2009 01:59 PM
REVIEW - Carrie Woeck Painting Tutorial using Corel Painter DannyRaphael Photo-Art Resources 0 08-20-2007 07:40 PM
Painting From Scanned Newspaper Photo Photomaster Photo-Based Art 6 01-19-2006 09:41 AM
painting jenjen Photo Restoration 4 08-06-2005 09:18 PM

All times are GMT -6. The time now is 08:31 PM.

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