3-D display on fossils

[cherry]

Hi,

I need to do 3-Dimentional display for my speech on fossils. Could anyone explain how to do 3-d display on fossils to give speech?

Thanks,

Cherry

[ScienceExpert123]

Dear Cherry,

That seems like a very interesting project! If you don't have real fossils, you will probably be able to make assorted 3D models with common household items, like cardboard and plastic. You can use a picture of the fossil as a reference.

good luck.....let me know if you have any more questions,
scienceexpert123

[deleted-71417]

Hi,

So you want to give a lecture with 3D displays. This is a difficult problem. Let me summarize the approaches I know about.

The simplest, and probably the only practical one for you, is to use real fossils or physical models (like plastic molds of real fossils). These are inherently 3D.

The next best thing is to use holographic images of the object to be shown. These are specialized photographs made with lasers that project real 3 dimensional images. Common examples of these are the dove image on most VISA credit cards.

Another fairly practical approach is a Quick Time movie or image approach. These are really 2D images, but can be done so you can “walk around” the object to be displayed. Here is a description of a conceptually related system:
http://www.genextech.com/pages/600/Display.htm


All the other approaches try to create a stereoscopic view by delivering two images, which are pictures taken from cameras separated from each other by the distance between our eyes, one image to each eye. There are several ways to do this. Here is a site that summarises several approaches:

http://fullhd3d.panasonic.eu/en_GB/arti ... me-viewing

The oldest is the stereo opticon viewer which was a hand held viewer that used used film strips. It had eyepieces for each eye that let you see separate film images of the same scene. I had one as a kid that had a filmstrip of the Grand Canyon that was dramatically real looking.

Other approaches include movie systems. Some made you wear glasses that had red and green filters for the eyes. The two images were projected in red or green, one color for each eye.

Another system used polarized light, horizontally polarized for one eye, vertically polarized for the other.

Another system used glasses with shutters, so only one eye sees the screen at any one time. The film projected alternating left and right eye images in sequence, and the shutters were sequenced so the correct eye saw the correct image. By flashing images quickly enough, the impression you get is a real time moving image.

The last approach I know about is to slice the two images into extremely narrow vertical strips. These are then combined into one image of alternating eye strips. An array of cylindrical lens is placed in front of the composite picture, with a cylindrical lens over each stripe pair of the image. If this is done correctly each eye sees its intended image, but not the other image. Here is slightly more detailed explanation:

http://www.hft.org/HFT03/paper03/37_Qua.pdf

Those are all the approaches that I know of to “solving” this problem. Good luck on finding a solution that works for you.

Best wishes,

Barrett L. Tomlinson

PS If you want to dig deeper into this topic, here is a site with lots of detailed references to papers in journals:

http://www.visionbib.com/bibliography/s ... ml#TT37382