Download presentation
Presentation is loading. Please wait.
1
Passive Stereo Projection in the Classroom
Lessons learned putting a system together Eric Wiebe Bethany Smith
2
Motivation Addressing the need for sensorially rich instructional experiences Leveraging perceptual processes to enhance learning Meeting the infrastructure realities of the classroom
3
How does the system work?
Stereopsis - binocular depth cue The right and left eye (65mm apart) record slightly different projections of the same 3-D scene The brain uses these discrepancies to recreate the 3-D nature of the scene - the sensation of depth How do you send two different projections to the two eyes from a flat screen?
4
Types of Stereo Projection
Two-image systems Optics to separate right/left eye reception Free fusion One screen/two images Active shutters One image Color anaglyphs Polarized anaglyphs
5
Polarized 3-D Stereo
6
System Components Screen 2 projectors Polarizing Filters and glasses
Computer Dual output graphics card
7
Screen Rear projection Front projection Vendor: Tierney Brothers
Disney Black Snapper Screen 72” x 96” More room needed Users can be close to the screen without blocking the projection Very Delicate Front projection DaLite Silver Screen Less room needed - viewers take up the same space as the projection throw Durable Vendor: Tierney Brothers Cost: $1800 Vendor: B & H Cost: $300
8
Screen Frame & Cart Custom made from 80/20 modular structural aluminum
Specification issues Determining true size of screen Determining number, type and spacing of snaps Construction issues Portable, but sturdy Vendor: Bertelkamp Screen: $900 Cart: $600
9
Projectors inFocus LP530 DLP Projector 2000 Lumens
Filters cut down light output High Lumens needed Heat Circulation Issues Enhanced connectivity module Monitor attachment and remote control Projector stacker Mobile State Contract Connectivity module added $500 Vendor: CDW Projector: $4500/pair Stacker: $500
10
Polarizing Filters & Glasses
Linear Cheaper Variety of styles Theme Park Satisfactory Orientation issues Circular More expensive One style Aviator Vendor: Berezin Filters: $25/pair Glasses: $45 for 30 pairs Vendor: Berezin Filters: $230/pair Glasses: $200 for 10 pairs Berezin just came out with theme park style circular polarizing glasses at $10 a piece.
11
Computer Windows or Linux machine Video Card nVidea Quadro4 750 XGL
Open GL Stereo features Two monitor out Issues determining the selection of the stereo features Vendor: Dell Cost: $2000 Vendor: Page Computer Cost: $350
12
3-D Printer Creates a physical 3-D model of a virtual 3-D model
IGES and STL export from popular 3-D modelers Binder/powder and fused deposition most common low-cost techniques Expands the sensorial experience into the haptic realm
13
Virtual 3-D Model
14
Physical 3-D Model
15
Software Applications
Pokescope Basic stereo pair application VRCAD viewer For viewing AutoCad files OpenGL Based Software
16
Current Applications vPython Engineering Graphics Earth Science
Graphics library extension to Python Used in physics education for simulation Engineering Graphics Engineered object representation Bringing together virtual and physical models Earth Science Targeting middle/high school earth science Enhancing understanding of surface and sub-surface features
17
Examples
18
Current Research Logistical and practical use of system in the classroom Efficacy of system for enhancing understanding Individual differences Concept/representation interaction Task/representation interaction
19
Future Research Combining current eye-tracking research with 3-D system Does binocular cueing influence perceived feature salience? Using eye-tracking to control display of 3-D content
20
http://ced.ncsu.edu/vise eric_wiebe@ncsu.edu bethany_smith@ncsu.edu
Visit our website or us for more information
Similar presentations
© 2025 SlidePlayer.com. Inc.
All rights reserved.