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uuglypher
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I need your opinions...

Postby uuglypher » Tue Oct 24, 2017 11:38 pm

3D image pairs...Please compare effects of contrast

I am preparing educational handouts relating to a presentation and a workshop on
2D-to-3D conversion.

The handouts will be in B&W and I am particularly curious about the extent to which image contrast may affect the perceived 3D effect.

These three stereo triplets are presented for your comparison and comments.

For those unfamiliar with viewing stereo triplets:

View the left and middle images by parallel gaze, or ....
view the middle and right images by crossed gaze..
(Use whichever technique you find most comfortable.)

Note that the images used are my own and are not to be downloaded nor manipulated in any way without gaining my explicit permission.

Dave
0E74FEBC-B386-4EF3-80DF-4F372BA5FAF7.png
E5B17C43-9898-4103-8A6F-295E3F71565C.png
FC3E9FF6-EEE0-44FD-A9E6-FF3E5D60456A.png

Matt Quinn
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Re: I need your opinions...

Postby Matt Quinn » Wed Oct 25, 2017 1:40 am

Dave, With crossed gaze, high contrast is the best. Matt
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Psjunkie
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Re: I need your opinions...

Postby Psjunkie » Wed Oct 25, 2017 2:12 pm

Sorry I can be of no help here....

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uuglypher
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Re: I need your opinions...

Postby uuglypher » Fri Oct 27, 2017 2:40 am

Matt Quinn wrote:Dave, With crossed gaze, high contrast is the best. Matt

Thank you, Matt,
I appreciate your looking and making comment re: my reason for posting.

Dave

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Re: I need your opinions...

Postby Duck » Fri Oct 27, 2017 4:37 am

Hey Dave, it seems I can cross my eyes easier than I can do the parallel gaze. The thing is, they both give me the same 3D results so I'm not sure what the technical differences are. Anyhow...

Both the medium and high contrast create easily readable effects, on screen, where you are presenting these. However, when it goes to print you have to realize that if you are using just a regular office printer it will automatically increase the contrast so you need to keep that contrast gain in mind when printing your handout. Then, if you opt to photocopy that handout, some copiers can increase contrast further. Some copiers will also decrease the black point causing a tonal shift in the print. My suggestion is to run a variety of samples through on a page, have them photocopied by the service you intend on using and viewing the results yourself. You may find that while the high contrast image here gives best results on screen it could potentially be too contrasty in print.

Hope this helps.
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Re: I need your opinions...

Postby St3v3M » Mon Nov 06, 2017 3:54 pm

uuglypher wrote:... I am preparing educational handouts relating to a presentation and a workshop on
2D-to-3D conversion. ...

If you don't mind, please tell us more about the class! S-
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