 |
In Photoshop, to apply the Optimized Anaglyph method described in the article to which you refer, you would need to do the following:
Channel Mixer - Left Chip:
* Red Output Channel: Red - 0%, Green - 70%, Blue - 30%
* Green Output Channel: Red - 0%, Green - 0%, Blue - 0%
* Blue Output Channel: Red - 0%, Green - 0%, Blue - 0%
Channel Mixer - Right Chip:
* Red Output Channel: Red - 0%, Green - 0%, Blue - 0%
* Green Output Channel: Red - 0%, Green - 100%, Blue - 0%
* Blue Output Channel: Red - 0%, Green - 0%, Blue - 100%
Paste the Left Red Channel into the Right Red Channel, then:
Levels Adjustment (Red Channel):
* Input: 0 | 1.5 | 255
* Output: 0 | 255
Originally posted 5 months ago.
(
permalink
)
ByteMyzer edited this topic 5 months ago.
|
 |
I went and tried it on an image that had particularly bad retinal rivalry because of bold primary colors. The Optimized Anaglyph certainly cured the retinal rivalry, and made the image easier to fuse. But of course the colors underwent a big change too.
Posted 5 months ago.
(
permalink
)
|
 |
I have to believe that curing the retinal rivalry has to change the image colors unless we use different viewing filter coloration or crossed-eye or flicker techniques.
Posted 5 months ago.
(
permalink
)
|
 |
"Paste the Left Red Channel into the Right Red Channel"
Please explain this step further. Thanks again!
Jeff: With color filters over your eyes, you can't see the true image colors anyway. For me, curing retinal rivalry produces a much more solid and convincing 3d image, and I feel that's worth much more than a large color depth, as far as anaglyphs are concerned.
Originally posted 5 months ago.
(
permalink
)
crookedtool420 edited this topic 5 months ago.
|
 |
Hi Matthew, thanks for the process steps.
Crooked had a good question and I want to ask about
"Levels Adjustment (Red Channel):"
Which chip does this refer to, both?
Posted 5 months ago.
(
permalink
)
|
|
crookedtool420:
After you channel mix both chips, copy the Left Chip, select the Red Channel of the Right Chip, and paste. (Consult the help file for your particular version of Photoshop)
DanD3Dman:
This refers to the anaglyph after you've combined the chips. Go to Image > Adjustments > Levels:
* Channel: Red
* Input Levels: 0 | 1.5 | 255
* Output Levels: 0 | 255
Posted 5 months ago.
(
permalink
)
|
|
ByteMyzer: I appreciate all the help. Just one more question, though. I'm sorry, I'm new to this, but what's a chip?
Posted 5 months ago.
(
permalink
)
|
|
The Left and Right images, or "chips" represent the Left and Right eye views of a subject, respectively.
Posted 5 months ago.
(
permalink
)
|
 |
hey, look at all these players..
The channelmixer is the key allright. This seems a bit extreme though. I allways mix the red with the blue in the left image to reduce rivals. I never ever mess around with the green channel because I want to fix the problem where it is, not create new problems in the proces. I use Hue/Saturation in the right image to control the colors. This is ofcourse what I do, it does not mean it is the best way. I´ve uploaded my version of Seans 2D>3D conversion as evidence material here.. www.flickr.com/photos/42224310@N00/2680073501/
So now there is the original plain anaglyph, the optimized version and my compromize aiming to get a little bit of both. Please help us by telling us in which direction you would like to see your 1st choice of anaglyph go.
If you really want some fun, then join in by making your version of the challenge. I´m sure Sean will provide you with the chips too.
Posted 5 months ago.
(
permalink
)
|
|
Yes, absolutely I will. Anyone who wants to try to optimize the Club Penguin pic for comparison, just send me a message and I will send you the left and right images.
Posted 5 months ago.
(
permalink
)
|
|
All of the contenders are posted here, and also here on my site, for easy comparison.
Posted 5 months ago.
(
permalink
)
|
 |
This topic pretty much explains why I use AnaBuilder if I am going to post anaglyphs online. Once you have modified the config files for speed on your computer, the program works quite well for a java application. There is a lot that you can do in the filters area. There are numerous presets for strong colors in your images that work very well. Perhaps I'm a bit lazy not wanting to use Photoshop or PSP (okay, not perhaps ... usually), but I don't see why you would want to reinvent the wheel when someone else has put so much time and effort into the cause.
Posted 5 months ago.
(
permalink
)
|
|
Okay Mike, let´s see that Anabuilder version please.
Posted 5 months ago.
(
permalink
)
|
|
Okay ... AnaBuilder and Cosima anaglyphs should be posted soon. Even I was surprised by the results.
Posted 5 months ago.
(
permalink
)
|
 |
Here is my shot with the least-squares algorithm.
www.flickr.com/photos/e_dubois/2688787053/
Ghosting is rather strong.
Posted 5 months ago.
(
permalink
)
|
 |
Yes...if you take that last one and split the RGB channels you can see quite a lot of "left eye" in the "right eye" and vice versa - much more than you get caused by jpeg compression. Guess that is a result of the strong colours in the orginal?
Originally posted 5 months ago.
(
permalink
)
Dan (aka firrs) edited this topic 5 months ago.
|
|
There, I have all nine anaglyphs by Mike Bittner on the page now. Some of them are very good, I just might become a convert to AnaBuilder myself.
I do find it strange that the AnaBuilder "Dubois" anaglyph is not identical to Eric Dubois's anaglyph. Are there variations of the Dubois algorithm?
Posted 5 months ago.
(
permalink
)
|
|
I have a couple of comments on the last point.
1. The least-square algorithm that I developed uses the spectral transmission curves of the glasses and the spectral density of the RGB display primaries. The version I use is for red-cyan glasses, specifically ones from American Paper Optics, and for a CRT display. Thus there is in principle a different transformation for each glasses - display pair. I did notice that ghosting was less visible on a CRT display than on an LCD display for my image. I have not implemented the algorithm for LCD spectral responses yet.
2. I have no idea how the algorithm is implemented in AnaBuilder. In my own implementation, I assume that the left and right images are gamma corrected, so I apply gamma, do the transformation in the linear domain, then apply gamma correction to the final anaglyph. If AnaBuilder does not do that, it might explain the slightly different tone scale. My own implementation uses MATLAB and is not portable.
Posted 5 months ago.
(
permalink
)
|
 |
Here's my shot at optimization:
farm4.static.flickr.com/3103/2699328439_b556ee104f_o.jpg
I desperately tried to preserve some red in this anaglyph.
In Photoshop CS3, I desaturated the blues and cyans by about 50% in the left chip, and the reds by about the same amount in the right chip. I did switch to Lab mode before the adjustments.
Originally posted 4 months ago.
(
permalink
)
jaysdesk edited this topic 4 months ago.
|
|
I posted your adjustment to the page. Good job of preserving the red, and the colors generally.
Posted 4 months ago.
(
permalink
)
|
|
Here is my "secret sauce" method cooked up really quickly, but specifically for this image.
farm4.static.flickr.com/3177/2701629835_a163386a0e_o.png
Posted 4 months ago.
(
permalink
)
|
|
Dan, it looks good. But could you give at least a general description of the steps you took to get it?
Posted 4 months ago.
(
permalink
)
|
|
Not easily but it involved changing the shape of the R, G and B histograms of the L and R views and then using using the saturation blend mode to overlay the modified image over the original. The intended effect was to clip the highest R, G and B values, muddy the purest R, G and B colous, and yet leave the the rest of the colours more or less intact. It was literally five minutes of tinkering while wearing the glasses until I got an image that had tolerable retinal rivalry. Then I made the anaglyph.
No idea if any of that is logical, but I think it worked nevertheless.
Originally posted 4 months ago.
(
permalink
)
Dan (aka firrs) edited this topic 4 months ago.
|
|
I uploaded yet another version of club_Penguin that I believe compares favorably to my earlier posting, with a difference that this one is stupefyingly easy to do and describe. Best of all it can be done in Photoshop Elements.
Here is the Link : www.flickr.com/photos/fromjaysdesk/2742210997/
Originally posted 4 months ago.
(
permalink
)
jaysdesk edited this topic 4 months ago.
|
 |
Just tried on an image making the left chip black and white, and the right chip colour to see what happened, I was ammazed to see that it gave a similar effect to the optimization as at the top of this article.......
Originally posted 2 months ago.
(
permalink
)
3dbeadyeyes2 edited this topic 2 months ago.
|
|
3dbeadyeyes2,
That's why the principle behind the Half-Color Anaglyph works.
Because the Red filter only passes one color, the most that the viewer can perceive about the image is its brightness, not its color. Therefore you might as well grayscale the Left chip before rendering the anaglyph.
This by itself does not accommodate all colors. You may still encounter extreme retinal rivalry for purely Red color components because, unaltered, the Right chip contains no Red information in the Green or Blue channels. Thus, any Red objects will appear extremely dark through the Cyan filter in contrast to the Red filter view.
Posted 2 months ago.
(
permalink
)
|
 |
hi, any one has advise for printing anaglyphs?
Posted 2 months ago.
(
permalink
)
|
|
Hello, santisan,
You're more likely to get attention from your question as a separate question if you post it as a NEW topic, not as a reply to this one.
Posted 2 months ago.
(
permalink
)
|
|
thanks ByteMyzer
Posted 2 months ago.
(
permalink
)
|
Would you like to comment?
Sign up for a free account, or sign in (if you're already a member).
|
Anaglyph (Red-Cyan 3D Pictures) /
Discuss
Feed – Subscribe to Anaglyph (Red-Cyan 3D Pictures) discussion threads
Flickr Blog |
About Flickr |
Terms of Use |
Your Privacy |
Copyright/IP Policy | Report Abuse
|
Deutsch
|
English
|
Español
|
Français
|
|
Italiano
|
Português
Copyright © 2008 Yahoo! Inc. All rights reserved.
Bookmark on Delicious
