Strictly these are false stereo, in that they use the motion of the comet against the background stars to create an illusion of 3D. A friend has described then as an application of 'Cubeism' (different viewpoints) - or possibly 'Futureism' (different times) ! Whatever, it seems to help the brain separate the delicate comet corona and tail from the background stars.
The idea for these was given to me by Patrick Vantuyne's anaglyptic
stereo-image of comet 17P/Holmes :
However these are full-colour stereo-images and you can
zoom into and then pan the stereo-image pairs,
just download my free viewer 'StereoPanorama' :
You can then view these stereo-pairs without any stereo-glasses glasses :
one just has to convince the left eye to look at the left image and the right eye at the right image (some people find it easier to do it cross-eyed, which is also supported). Then you get 3 images, of which the middle one is in stereo !
The virtue of Stereo Panorama is that it maintains the correct image separation for stereo viewing, as one zooms into and pans the images, and also allows one to adjust the brightness and contrast, as one moves around the stereo-image.
To download these images, right-click on the separate left and right images,
and use 'save as',
and then save them to a convenient directory from which StereoPanorama can read them.
(The L+R images are just so you can get an impression of what they look like in StereoPanorama.)
This is a direct copy of Patrick Vantuyne'S
anaglyptic, but as a full- colour stereo-pair :
Left stereocomponent: spaceweather.com/comets/holmes/05nov07/Jack-Newton1.jpg
Right stereocomponent: http://spaceweather.com/comets/holmes/05nov07/Ivan-Eder1.jpg
I found that running a Gaussian sharpen filter on the photo by Ivan Eder exposes a wealth of detail in the streamers; this is the sharpened image. (Run it twice and the effect is even more striking).
17P Holmes 2007 11 4+5 BeauWebber L+R
17P Holmes 2007 11 4+5 BeauWebber L+R zoom
17P Holmes 2007 11 4+5 BeauWebber Left
17P Holmes 2007 11 4+5 BeauWebber Right
This is an attempt to encode the different motions of comet 17P/Holmes and the disconnection event in the ion-tail as different depths in a full-colour false stereo image. Only partially successful, as the velocity vectors can not both be aligned along a left-right eye axis.
Uses the excellent pictures :
17P Holmes 2007 11 9 ed BeauWebber 3L+R
17P Holmes 2007 11 9 ed BeauWebber 3L+R zoom
17P Holmes 2007 11 9 ed BeauWebber 3L
17P Holmes 2007 11 9 ed BeauWebber 3R
Jack Newton has sent me two well matched pictures of the disconnection event, suitably separated in time (8th and 11th Nov. 2007), but with identical scaling and exposure. These give a deep stereo effect, with different velocities evident :
17P Holmes 2007 11 8+11 Disconnection Event Jack Newton L+R
17P Holmes 2007 11 8+11 Disconnection Event Jack Newton L
17P Holmes 2007 11 8+11 Disconnection Event Jack Newton R