Bit of 3D fun

[multiweb]

Ok, it's raining (again) and I'm bored :P
Anyone used those cool stereoscopic PS actions from Astroanarchy (http://astroanarchy.blogspot.com/)?

[marki]

Never been able to workout how two exact pics side by side are 3D:shrug:. Are we supposed to wear glasses or something? Nice pics by the way:thumbsup:.

[multiweb]

:) You're supposed to focus on the central line then cross your eyes until your head hurts. Then relax your vision to come into focus and you should see some 3D happening. I think Rho is the easiest to get started. When you've got the sweet spot you can flick the pics through looking at the same spot. If it's not working I'll supply the chardonnay :lol: :thumbsup:

[marki]

Well I starred hard and crossed my eyes until I felt dizzy and fell off my chair......still no go and I am sure ethanol wont help either, I will just see 4 pics instead of one :).

Mark

[multiweb]

It's a bit tricky the first time then it's easy to reproduce. Set your head about 50cm from your monitor, look at the central line and cross your eyes until you see a picture the width of each panels (left or right) in the middle. Once you got that you're 99% there. The rest is to focus to see the picture in 3D. Just try to keep the central picture width the same.

[TrevorW]

I think I need more wine

Thanks Marc

[David Fitz-Henr]

Yes, great fun - I love this sort of stuff!
I've achieved stereo viewing in two ways :

1. The way Marc describes. For the third image (Rho Ophiuchus?) the image appears to have three layers - stars on a layer in the distance, nebula in the middle layer and more stars on a foreground layer.

2. I dug out an old stereo viewer passed down from my grandmother, set the zoom on the screen to 50% (to match the spacing where the photos normally go) and positioned in the bottom left of screen, and positioned the viewer so I could vary the distance by sliding it under my lcd screen. There was still three layers, but there were different stars in the foreground layer.

With 1., your left eye is seeing the right hand image and vice versa.
With 2., you left eye sees the left image and right eye sees the right image.

[gregbradley]

I could do it but I can't say its easy.

Greg.

[multiweb]

Ha! Not trying hard enough mate! Gotta earn it :P



I wasn't aware of a device to view these panels. The action set generates two versions: cross and parallel vision. I posted the parallel output because that's the only one where I could see depth in the neb as well. The other one mostly created layers of stars and neb. I think the offset is based on luminosity or similar.

[David Fitz-Henr]

You've never seen an old 3D viewer!?! It's basically like a pair of glasses (positive lenses) with a metal slide attached in front on which there is a holder for the stereo photo. You slide the photo(s) toward/away from the lenses to a position that they are in focus. With the 3D viewer, the left eye focuses on the left image, etc. So I would say that the parallel version of the images you posted would be better suited to this. In fact, I'm a bit surprised that you get a 3D effect by crossing your eyes to view the opposite side images as well.

[MrB]

I suspected these were made in parallel mode as they appeared to be in 'reverse' or 'negative', that is, the depth goes back behind the plane rather than coming out.
The only difference between cross and parallel is which eye gets which image, with parallel the left eye should see the left image and the right eye the right image(as David's viewer does for him), with cross its the opposite, left eye see's right image. Thats why I get a 'reverse' effect when crossing my eyes for these parallel images.
I swapped the images in PS and got what I would consider the correct 'positive' image.

[RobF]

Is this person also "J.P.M" on Cloudy Nights do you know Marc?

[multiweb]

Nup, never seen one. :shrug: On my screen I started looking a the crosseyed version. When I got it right I flicked quickly between the cross and parallel. I found the parallel had depth in the nebulosity and the cross version had only a flat neb layer sandwiched between two star layers. One at the back and one at the front. Once you got the trick it's pretty easy to do it again.

[multiweb]

Interesting - will check that again.


Possibly. I'm not on CN much. He's in northern Europe somewhere. He's got a very long last name impossible to say. :) There are stacks of stereo examples on his website (http://astroanarchy.blogspot.com/)even anaglyphic.

[RobF]

Yes - just looked more closely. I'm pretty sure it is - he has a QHY9 and has done some awesome NB work.

[DavidU]

A 2005 wooded chardonnay? I may just try a beer:D

[Buddman]

Wow, love the third image. The dustcloud seems to float in front of the star field.

If I can get my eyes to re-align I'll be fine.

Adam

[Octane]

The last one looks like there's a horse galloping into the frame from bottom right.

Nicely done.

H

[bmitchell82]

hehehe i have been fiddling with this technique for a while marc and like you said its kinda hard to get right.

for me all i do is go mega cross-eyed. as hard as you can go, then start letting your eyes relax slowly, you'll see the image starting to come together then bam there it is

[multiweb]

I couldn't put it in words but there it is. That's exactly it. :thumbsup:

[David Fitz-Henr]

Well, I thought I'd post a couple of pics of my stereoviewer (complete with some old stereo cards from around the turn of the 19th-20th century) so you could see what it actually looks like. The photo seen seated in the stereo viewer is of some college girls in 1902 making some candy. I wonder what the odds are of any of them still being alive today and googling this webpage - probably "astronomical" !

[multiweb]

:eyepop: That'd be a collector item now. Awesome! :thumbsup:

[Hagar]

Marc, find something else to do when you are bored. My old eyes struggle to focus on a single image let alone these painfull optical gymnastics.

[multiweb]

:lol: Did you see it though? Just before the migraine ;)

[Spanrz]

OK, so how does one see it in 3D with only one eye? ;) :P

I so need 2 eyes..............:sadeyes:

[tlgerdes]

Sorry Guys, I think this is partly my fault.

I made mention to Marc of the idea of making 3D astro pics from a pair of ED80 Binos. He couldnt afford the Binos so he has done it another way.:screwy::lol::lol::eyepop::P

[multiweb]

Not true - I'm halfway there ;)

[tlgerdes]

Still need another ED80, FF IV and QHY8. Can't see your wife accepting that delivery docket.:rofl::rofl:

[multiweb]

That's why I've put your address for delivery. Gotta take one for the team mate. :)

[tlgerdes]

Happy to help mate, anytime you want stuff hidden, happy to hold onto it for you, just dont expect me not to use it.:thumbsup:

Now that's an idea, great stereoscopic effect, synchronised image taking 30kms apart.:lol: