Muutke küpsiste eelistusi

E-raamat: Eyestrain Reduction in Stereoscopic Vision [Wiley Online]

  • Formaat: 190 pages
  • Ilmumisaeg: 10-Jun-2016
  • Kirjastus: ISTE Ltd and John Wiley & Sons Inc
  • ISBN-10: 1119318335
  • ISBN-13: 9781119318330
Teised raamatud teemal:
  • Wiley Online
  • Hind: 174,45 €*
  • * hind, mis tagab piiramatu üheaegsete kasutajate arvuga ligipääsu piiramatuks ajaks
Eyestrain Reduction in Stereoscopic VisionSuurem pilt
  • Formaat: 190 pages
  • Ilmumisaeg: 10-Jun-2016
  • Kirjastus: ISTE Ltd and John Wiley & Sons Inc
  • ISBN-10: 1119318335
  • ISBN-13: 9781119318330
Teised raamatud teemal:
Wiley Online e-raamatudRohkem infot Wiley Online kohta
Raamatu kodulehekülg: https://onlinelibrary.wiley.com/doi/book/10.1002/9781119318330
Stereoscopic processes are increasingly used in virtual reality and entertainment. This technology is interesting because it allows for a quick immersion of the user, especially in terms of depth perception and relief clues. However, these processes tend to cause stress on the visual system if used over a prolonged period of time, leading some to question the cause of side effects that these systems generate in their users, such as eye fatigue.

This book explores the mechanisms of depth perception with and without stereoscopy and discusses the indices which are involved in the depth perception. The author describes the techniques used to capture and retransmit stereoscopic images. The causes of eyestrain related to these images are then presented along with their consequences in the long and short term. The study of the causes of eyestrain forms the basis for an improvement in these processes in the hopes of developing mechanisms for easier virtual viewing.
Acknowledgments ix
Introduction xi
Chapter 1 Principles of Depth and Shape Perception
1(24)
1.1 Function of the eye
1(1)
1.2 Depth perception without stereoscopy
2(7)
1.2.1 Monocular cues
2(5)
1.2.2 Proprioceptive cues
7(2)
1.3 Depth perception through stereoscopic vision
9(1)
1.4 Perception of inclinations and curves
10(12)
1.4.1 Perception of inclination and obliqueness
10(4)
1.4.2 Perception of curves
14(8)
1.5 Artificial stereoscopic vision
22(3)
Chapter 2 Technological Elements
25(16)
2.1 Taking a picture
25(1)
2.2 Reproduction
26(8)
2.2.1 Colorimetric differentiation
27(1)
2.2.2 Differentiation by polarization
28(2)
2.2.3 Active glasses
30(1)
2.2.4 Auto-stereoscopic screens
31(2)
2.2.5 Virtual reality headsets
33(1)
2.3 Motion parallax restitution
34(7)
2.3.1 Pseudoscopic movement
34(1)
2.3.2 Correcting pseudoscopic movements
35(5)
2.3.3 Monoscopic motion parallax
40(1)
Chapter 3 Causes of Visual Fatigue in Stereoscopic Vision
41(18)
3.1 Conflict between accommodation and convergence
41(3)
3.2 Too much depth
44(2)
3.3 High spatial frequencies
46(6)
3.3.1 Limits of fusion
49(1)
3.3.2 Comfort and high frequencies
50(2)
3.4 High temporal frequency
52(1)
3.5 Conflicts with monoscopic cues
52(1)
3.6 Vertical disparities
53(2)
3.7 Improper device settings
55(4)
3.7.1 Quality of image and display
55(1)
3.7.2 Differences between left and right images
56(1)
3.7.3 Speed of correction of pseudoscopic movements
57(2)
Chapter 4 Short- and Long-term Consequences
59(4)
4.1 Short-term effects
59(3)
4.1.1 Decreasing ease of accommodation
59(1)
4.1.2 Decrease in stereoscopic acuity
59(2)
4.1.3 Effects on the punctum proximum
61(1)
4.1.4 More subjective effects
61(1)
4.2 Long-term consequences
62(1)
4.2.1 Long-term effects on children
62(1)
Chapter 5 Measuring Visual Fatigue
63(12)
5.1 Visual acuity
63(2)
5.1.1 Different possible measurements
64(1)
5.1.2 Optotypes
64(1)
5.2 Proximum accommodation function
65(1)
5.3 Ease of accommodation
66(1)
5.4 Stereoscopic acuity
67(4)
5.4.1 Tests of distance vision
67(1)
5.4.2 Tests of near vision
68(3)
5.5 Disassociated heterophorias
71(1)
5.6 Fusional reserves
72(2)
5.7 Subjective tests
74(1)
Chapter 6 Reducing Spatial Frequencies
75(56)
6.1 Principle
75(1)
6.2 Technical solution
75(41)
6.2.1 Wavelets
76(16)
6.2.2 BOX FILTER
92(6)
6.2.3 Using a rolling average and other "blurs"
98(5)
6.2.4 Comparison of algorithms
103(11)
6.2.5 Chosen solution
114(2)
6.3 Experiment
116(2)
6.3.1 The task
116(2)
6.4 Measurements of fatigue taken
118(2)
6.4.1 Objective measurements
118(1)
6.4.2 Procedure
119(1)
6.4.3 The subjects
120(1)
6.5 Result
120(11)
6.5.1 Proximum accommodation function
120(1)
6.5.2 Ease of accommodation
121(1)
6.5.3 Stereoscopic acuity
122(1)
6.5.4 Effectiveness in execution of the task
122(1)
6.5.5 Subjective measurements
123(1)
6.5.6 Conclusions
124(1)
6.5.7 Discussion
124(7)
Chapter 7 Reducing the Distance Between the Virtual Cameras
131(24)
7.1 Principle
131(11)
7.1.1 Usefulness of stereoscopy in depth perception
132(1)
7.1.2 The objects
133(9)
7.1.3 Hypothesis
142(1)
7.2 Experiment
142(3)
7.2.1 Tasks
142(1)
7.2.2 Experimental conditions
143(1)
7.2.3 Subjects
144(1)
7.2.4 Measurements
144(1)
7.3 Results
145(7)
7.3.1 Results for fatigue
145(2)
7.3.2 Perception results
147(5)
7.4 Discussion
152(3)
7.4.1 Influence on visual fatigue
152(1)
7.4.2 Influence on visual perception
153(2)
Conclusion 155(2)
Bibliography 157(10)
Index 167
Laure Leroy is Associate Professor at the University of Paris 8 in France. Her research focuses on virtual reality systems.
Püsilink: https://www.kriso.ee/db/9781119318330_pe.html
Märksõnad: