Stereograph Of Nebula Options

[Harry]

The following pictures are the synthesized stereographs for Eagle Nebula (originally taken by HST). Please view them with parallel eyes or crossed eyes.
For other planetary stereographs, visit;

http://139.134.5.123/tiddler2/stereographe...bula/nebula.htm

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[Harry]

Perhaps someone may think measuring the deviation from focal point is meaningless for astronomical objects since their focal length from telescope is regarded as infinity. However as shown in the following stereographs of clouds on earth synthesized by Stereographer (please view them with parallel eyes or crossed eyes which you prefer), we can see those clouds perspectively even their focal length is almost infinity for our eyes. Namely our eyes are thought to recognize 3-dimensional feature of object without perceiving the difference of geometrical focal length.

Also I attached the synthesized stereographs of Orion Nebula (please view them with parallel eyes or crossed eyes which you prefer.)

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[Bob Shaw]

Perhaps someone may think measuring the deviation from focal point is meaningless for astronomical objects since their focal length from telescope is regarded as infinity. However as shown in the following stereographs of clouds on earth synthesized by Stereographer (please view them with parallel eyes or crossed eyes which you prefer), we can see those clouds perspectively even their focal length is almost infinity for our eyes. Namely our eyes are thought to recognize 3-dimensional feature of object without perceiving the difference of geometrical focal length.

Also I attached the synthesized stereographs of Orion Nebula (please view them with parallel eyes or crossed eyes which you prefer.)

Harry:

I've (oddly enough) wanted to make 3D images of clouds for years, but I confess that the only methods I could come up with involved several cameras at different locations. I can't for the life of me see how real stereo images can be generated from (in Terrestrial terms) any objects which are within the hyperfocal distance(s) of a single image taken with one lens. By definition, they are are on one plane!

It may be that physiological tricks can be played with images which will persuade us that depth is present, but I don't think that they represent the actual 3D structures, however interesting the results appear!

Bob Shaw

[Rob Pinnegar]

...I can't for the life of me see how real stereo images can be generated from (in Terrestrial terms) any objects which are within the hyperfocal distance(s) of a single image taken with one lens.  By definition, they are are on one plane!

There's no way we can get _real_ stereo images, of course. My gut-instinct guess is that the closest we could get would probably be Proxima Centauri and Alpha Centauri A/B, using photos taken over the course of several years. Even for this example, though, the mutual revolution of A and B during the time lapse between images would probably spoil the effect (unless we waited exactly one A/B orbital period).

However, it should be possible to manipulate images to artifically incorporate information about distance, by moving pixels around. That's probably what is being done here.

[Harry]

There's no way we can get _real_ stereo images, of course. My gut-instinct guess is that the closest we could get would probably be Proxima Centauri and Alpha Centauri A/B, using photos taken over the course of several years. Even for this example, though, the mutual revolution of A and B during the time lapse between images would probably spoil the effect (unless we waited exactly one A/B orbital period).

However, it should be possible to manipulate images to artifically incorporate information about distance, by moving pixels around. That's probably what is being done here.

If our left eye were one light year away from right eye, then we would have easily seen those stars in perspective...
Yes, the displacement of pixel depends on the deviation from focal point on each spot. However I must confess in the case of stars my software hardly estimates the correct deviation. Therefore even if using my software, Proxima Centauri and Alpha Centauri A/B will not be seen in perspective.

The following stereograph synthesized by Stereographer is for Ring Nebula (view: parallel eyes). It seems to have egg-shape rather than "ring".

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[jamescanvin]

The following stereograph synthesized by Stereographer is for Ring Nebula (view: parallel eyes). It seems to have egg-shape rather than "ring".

Which of course is probably close to reality (rings like this are nearly always spherical(ish) shells) but that must be a coincidence right? Your not guessing the 3D structure before making these images are you; just running a mathematical routine?

James

[Harry]

Which of course is probably close to reality (rings like this are nearly always spherical(ish) shells) but  that must be a coincidence right? Your not guessing the 3D structure before making these images are you; just running a mathematical routine?

James

Of course I don't have any idea about the 3-dimensional shape of nebula before running the software (I think no one knows it!) Regarding the pictures shown in my previous posts, I've never modified those pictures with sharpening or color enhancing before and after applying Stereographer for them.

The following picture is the stereograph for Lagoon Nebula (view: parallel eyes).

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[dilo]

Of course I don't have any idea about the 3-dimensional shape of nebula before running the software (I think no one knows it!)

Wath beauties, I'm increasingly delighted by these stereograph, Harry, indipendently from their real accuracy!
It seems that program decide automatically the depth structure, I'm right?

[Harry]

Wath beauties, I'm increasingly delighted by these stereograph, Harry, indipendently from their real accuracy! 
It seems that program decide automatically the depth structure, I'm right?

Yes. As explained in the site Stereographer, my method estimates the deviation from focal point on each spot of the image by evaluating the extent of blurry. Of course for telescope the focal length of any astronomical object is regarded as infinity. However if that object has fractal appearance, it is possible to estimate the deviation from focal point (i.e. infinitely remote place) with the similar manner.

The following picture is the stereograph for Pencil Nebula (view: parallel eyes.) By the way, if available, could you show us other anaglyphs? For, I was so impressed by the anaglyph you've made.

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