Talk:Autostereogram

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Unfinished tasks from peer review

Jan van Male

• These images are purely made for recreational purposes?
• Are there any limits on the size of the depicted objects?

.....

• Recreational: some people claim autostereograms actually help correct eye problems (assuming that you are using wall-eyed viewing). I think this may be true, but I haven't yet come across real evidence/literature on this. The two-image version (those viewed under stereoscope) actually helped the military discover camouflaged ground vehicles. But... err... yeah, they are mainly for recreation.
• Size: I am not sure what you mean by size. Is it the overal size of the hidden 3D image (that is, the physical dimension of the stereogram - A4, legal, poster size, etc.)? Do you mean the physical distance between the repeating patterns? These all depend on the viewing distance. I was able to see the autostereograms in this article projected on a 12-foot screen, but it required extreme eye divergence. It took me quite a while to master that. Another reviewer in the article discussion page also asked about this. I think I'll add a subsection on this.

Older stuff

is that the only PD example you have? It's has extremely limited contrast for the square and will be hard for inexperianced people to image (it's also _small_) Rick Boatright 22:00, 16 Mar 2004 (UTC)

It's my first image upload and there's a lot of stuff about not making images too big, so I erred on the small side. All I've got is an un-cropped version. What do you mean by contrast? That the square doesn't 'jump out' enough? Please understand that these are time-consuming to make by hand, so if I'm to change it I need to know everything that's wrong with it. --rparle 22:08, Mar 16, 2004 (UTC)

Boy, I know they're time consuming to make by hand. I can't imagine. Ick. But here's the thing. Make a thumbnail with a caption of "too small to view for effect" and link to the full sized image. I _think_ that to get a reasonable "pop" you're going to have to approach 500 pixels wide.... There are times and places that a big image is appropriate. Rick Boatright 00:05, 17 Mar 2004 (UTC)

I've got a few skeletons of pictures lying around and I've got a pretty good idea of what I'm doing right and wrong with them, so I should be able to do one with better contrast and maybe (if we're lucky) a more interesting shape. I'd love to do the wikipedia logo, or at least it's silouette. --rparle 03:12, Mar 17, 2004 (UTC)

The one I've put up now is much higher contrast then the first. It's big enough to see pretty easily I think. --rparle 20:01, Mar 18, 2004 (UTC)

MUCH BETTER! Rick Boatright 05:57, 19 Mar 2004 (UTC)

Thanks for the help Rick, I'm pleased with the current image. It's nice to know that someone is actually seeing the work I've done. --rparle 16:30, Mar 19, 2004 (UTC)

I removed the following line because I had no clue what it was meant to say. If someone wants to clarify, be my guest:

The fact is that there is a clear limit on how much the eyes can go away from each other, it is when there are parallel : about 6 centimeters away.

--Rory ☺ 01:14, Jul 8, 2004 (UTC)

I added quite a few images and paragraphs. Due to server problem, I didn't edit my writing carefully. If anyone is interested in editing my writing, please go ahead. Also, I'll be adding more stuff to the "How To See Them" section in the near future. Fred 2005 Mar 7

Well, the first draft for this page is finished. The article now has expanded How Do They Work and How To See Them sections each with its own subsections. The next step is to expand History and Refererence sections. Fred Hsu 01:10, 13 Mar 2005 (UTC)

limitations

is there a publication of researh on the limitation? i.e. to what extend this method can create illusion of 3D? For example, apparently it can only emulate surfaces, i.e. the viewing angle is only some 20 degrees. For fine can the 3d object illusion be achieved? e.g. can it emulate a mesh of wire? is it possible to extend this method to include color? ... Xah Lee 19:00, 2005 Feb 6 (UTC)

I added a dozen of examples to illustrate some of the issues you brought up. Due to wikipedia server problems, the editing process took 5 times longer than it would have under normal conditions. But this is my first wikipedia editing... perhaps this is the norm :( I will add more paragraphs in the future to address other questions. For instance, the limit for the perceived depth of image is the distance between repeated patters. The limit for the resolution of depth is the physical size of each pixel. Fred 2005 Mar 7

Temporarily removed content

I am replacing this image with a color random dot stereogram showing the same shark used in other illustrations in this article. I don't want to lose the original image. So I moved it here temporarily. Fred Hsu 04:22, 14 Mar 2005 (UTC)

This example is a random dot stereogram featuring a two raised boxes on a flat background. The boxes appear closer than the background because the distance between repeats on the squares is ten pixels shorter than on the background.