Autostereograms: analysis and algorithms.

by Lau Shek Kwan Mark.Thesis (M.Phil.)--Chinese University of Hong Kong, 2001.Includes bibliographical references (leaves 85-86).Abstracts in English and Chinese.Chapter 1 --- Introduction --- p.1Chapter 1.1 --- Historical Background --- p.2Chapter 1.2 --- Introduction to Autostereograms --- p.5Chapter 1.2.1 --- Geometrical Model --- p.5Chapter 1.2.2 --- IS-separation --- p.6Chapter 1.2.3 --- The Hidden Surfaces --- p.7Chapter 1.2.4 --- False Target and Echo --- p.8Chapter 1.3 --- The Autostereogram Generation Algorithm --- p.10Chapter 1.4 --- Further Applications of Autostereograms --- p.15Chapter 1.5 --- Organization of Thesis --- p.17Chapter 2 --- Analysis of Autostereograms --- p.20Chapter 2.1 --- IS-separation --- p.21Chapter 2.2 --- Autostereogram Generations --- p.25Chapter 2.3 --- Surface Reconstructions --- p.26Chapter 2.4 --- Visual Distortions --- p.28Chapter 2.4.1 --- Problem Model For Vertical Distortions --- p.30Chapter 2.4.2 --- Change of Depth Field --- p.33Chapter 2.4.3 --- Non-linear Distortion --- p.35Chapter 2.4.4 --- Lateral Distortions --- p.38Chapter 2.5 --- Discrete Autostereograms --- p.40Chapter 2.5.1 --- Truncation Problem --- p.41Chapter 2.5.2 --- Computer Algorithms for Autostereograms --- p.42Chapter 3 --- Analysis of Echoes --- p.48Chapter 3.1 --- Causes of Echoes --- p.49Chapter 3.1.1 --- Insufficient Lengths of The Periods of Repeating Patterns --- p.51Chapter 3.1.2 --- Overlapping of Copying Steps --- p.51Chapter 3.2 --- Avoidance of Type 1 Echoes --- p.52Chapter 3.3 --- Avoidance of Type 2 Echoes --- p.55Chapter 3.4 --- Autostereogram Encoding Any Surface --- p.58Chapter 4 --- Autostereogram as A Cryptosystem --- p.65Chapter 4.1 --- Introduction to Cryptography --- p.66Chapter 4.1.1 --- Mathematical Structure of Cryptosystems --- p.67Chapter 4.1.2 --- A Classical Cryptosystem´ؤSubstitution Cipher --- p.68Chapter 4.2 --- Autostereogram as a Cryptosystem --- p.72Chapter 4.2.1 --- Autostereogram as a Variation of Substitution Cipher --- p.74Chapter 4.2.2 --- Practical Considerations --- p.76Chapter 5 --- Conclusion and Future Works --- p.79Chapter 5.1 --- Future Works --- p.80Chapter A --- Excessive Removal of Copying Steps --- p.81Chapter B --- Publications Resulted from the Study --- p.8