Suchen und Finden
Mehr zum Inhalt
Computer Vision, Imaging and Computer Graphics. Theory and Applications - International Joint Conference, VISIGRAPP 2009, Lisboa, Portugal, February 5-8, 2009. Revised Selected Papers
Preface
5
Organization
6
Table of Contents
11
Invited Papers
14
Human Habitat Data in 3D for the Internet
15
Introduction
15
A Historical Perspective
16
Defining the Concept of “Location-Awareness” on the Internet
18
Creating 3 Dimensional Models via Aerial Photogrammetry
19
Data
19
Data Processing
19
Geometric Accuracy
21
Limitless Detail
22
Economic Justifications
24
Research Challenges
25
Conclusions
27
References
28
Part I: Computer Graphics Theory and Applications
30
Fast Spatially Controllable Multi-dimensional Exemplar-Based Texture Synthesis and Morphing
31
Introduction
31
Related Work
32
Lefebvre and Hoppe's 2D Texture Synthesis
33
Our 2D Texture Morphing Algorithm
33
Initialization
34
Coordinate Jitter
34
Correction Phase
35
3D Texture Synthesis and Morphing
35
Initialization
36
Coordinate Upsampling
36
Correction Phase
36
A New Neighborhood
37
Synthesis and Morphing of Additional Channels
37
Higher-Dimensional Texture Synthesis
38
Results
39
Texture-Enhanced Direct Volume Rendering
41
Comparison with Kopf et al.'s Algorithm
42
Conclusions and Future Work
43
References
43
Extending Marching Cubes with Adaptative Methods to Obtain More Accurate Iso-surfaces
45
Introduction
45
Related Work
46
Methodology
48
Results
50
Conclusions and Future Work
52
References
53
High-Quality Non-planar Projections Using Real-Time Piecewise Perspective Projections
55
Introduction
55
Real-Time Non-pinhole Projections on GPU without Raytracing
56
Piecewise Perspective Projection Overview
57
Piecewise Perspective Projection
58
Real-Time Implementation
59
Single-Pass Implementation with a Configurable Tessellator Unit
60
Applications
61
Cylindrical Projection
61
Texture-Based View Deformation
63
Results
64
Conclusions
66
References
67
An Interactive Fluid Model of Jellyfish for Animation
69
Introduction
69
Previous Work
70
A Numerical Model of Jellyfish
71
Jellyfish Physiology
71
2D Simulation Model
73
Muscle Activation
74
2D Rendering Model
75
3D Extrapolation
76
Results
78
Conclusions and Future Work
80
References
81
Unbiased Closed-Form Solutions for Center of Rotation
83
Introduction
83
Skeleton Extraction Techniques
84
Spherical Curve-Fitting Approaches
85
Monte-Carlo Experiments
85
Cramér-Rao Lower Bound
86
Non-linear Maximum Likelihood Estimator
86
Linear Least Square Method
87
Generalized Delogne-Kása Exposition
88
Unbiased Generalized Delogne-Kása Estimator
89
Multiple Radii Solution
92
Incremental Improved Solution
92
Results
93
Case Study Ð CMU Data
93
Case Study of Eric Camper's ACCAD Data
94
Comparison
94
Summary of Important Results
95
Conclusions and Further Research
96
References
97
A Visualization Paradigm for 3D Map-Based Mobile Services
99
Introduction
99
Conceptual Framework
101
Evaluation of Feature Vectors
102
Image Realism
103
Object Labeling
104
Route Indication
104
Landmark Symbology
105
Discussion of the Results
106
Image Realism
106
Object Labeling
107
Visual-Spatial Abstraction
107
Route Indication
108
Landmark Symbology
108
Contextual Awareness
109
A Visualization Paradigm for 3D Map-Based Mobile Services
109
Visualization Layers
110
Visualization Functions
111
Conclusions and Future Work
112
References
113
New Augmented Reality Techniques for Product Design: The Flip-Flop Menu
114
Introduction
114
Related Work
115
"Jumping" Interaction Technique
116
Flip-Flop Interaction Technique
117
Description
118
Experiment 1: Effect of Marker Arrangement
119
Aim
119
Experimental Protocol
119
Task
120
Results
120
Experiment 2: Effect of Viewing Condition
121
Aim
121
Experimental Protocol
121
Results
122
Discussion
124
Conclusions and Future Work
124
References
124
Part II: Imaging Theory and Applications
126
Analytical Imaging of Traditional Japanese Paintings Using Multispectral Images
127
Introduction
127
Experiment
128
Image Acquisition
129
Spectral Reflectance Reconstruction, Image Calibration and Pigment Identification
130
Results and Discussion
132
Reconstruction of Spectral Reflectance
132
Image Stitching
135
Pigment Estimation
137
Conclusions
138
References
139
Stereo Analysis of Archaelogical Scenes Using Monogenic Signal Representation
141
Introduction
141
Phase Domain Methods
142
Feature Extraction Using Phase Congruency
142
Feature Matching on the Phase Domain
143
Dense Disparity Computation
145
Similarity Function
145
Optimization
146
Implementation - Results
147
Feature Detection - Matching
147
3D Reconstruction Results
149
Conclusions and Future Work
152
References
152
Imaging of the Vocal Tract Based on Magnetic Resonance Techniques
154
Introduction
154
MR Imaging of the Vocal Tract
156
Methods
156
Equipment, Corpus and Subjects
157
Techniques
157
Results and Discussion
160
Conclusions and Future Work
162
References
163
SRAD, Optical Flow and Primitive Prior Based Active Contours for Echocardiography
166
Introduction
166
System and Methods
168
Parametric Active Contour Review
168
SRAD Measurements
170
Optical Flow Estimates
171
Primitive Shape Measurements on Contour Points
173
Fusion Characteristics
174
Results and Discussion
175
Conclusions
178
References
178
Part III: Computer Vision Theory and Applications
180
Scene Segmentation from 3D Motion and Category-Specific Information
181
Introduction
181
Scene Segmentation Using MRFs
182
Low-Level Information
184
Category-Specific Information
185
Context Information
188
Experimental Results
189
Conclusions
192
References
192
Hierarchical S(3)-Coding of RGB Histograms
194
Introduction
194
Notations and Basic Facts
195
Implementation
198
S(3) Experiments
199
Hierarchical Transforms and Bin Quantization
203
Summary
205
References
206
Monocular SLAM Reconstructions and 3D City Models:Towards a Deep Consistency
207
Introduction
207
Transformations Model
209
Non-rigid Transformations Model
209
Transformations Parametrisation
209
Non-rigid ICP
210
Constrained Bundle Adjustment
212
Classical Bundle Adjustment
212
Proposed Constrained Bundle Adjustment
213
Experimental Results
216
Synthetic Sequence
216
Real Sequence
219
Conclusions
219
References
219
GPU-Based Euclidean Distance Transforms and Their Application to Volume Rendering
221
Introduction
221
Related Work
222
Problem Description
223
Algorithm
223
Vector Propagation
223
GPU-Based Implementation and Generalizations
225
Errors in 2D Vector Propagation
226
Generalization to 3D
226
Results and Discussion
227
Bandwidth and Runtime Complexity
227
Empirical Validation
227
Applications
230
Conclusions
233
References
233
Efficient Robust Active Appearance Model Fitting
235
Introduction
235
Fast-Robust PCA
237
Fast-Robust Training
238
Fast-Robust Reconstruction
238
Experimental Results
240
Robust AAM Fitting
242
Active Appearance Model
243
Robust Fitting
243
Experimental Results
244
Conclusions
245
References
246
Semi-supervised Distance Metric Learning inHigh-Dimensional Spaces by Using Equivalence Constraints
248
Introduction
248
Method
250
Problem Setting
250
Learning Full Rank Distance Metrics
251
Learning Low Rank Distance Metrics
252
Extensions to Nonlinear Cases
254
Experiments
254
Experiments on Gender Database
255
Experiments on Birds Database
256
Image Segmentation Applications
258
Summary and Conclusions
258
References
258
Orthogonal Distance Least Squares Fitting:A Novel Approach
261
Introduction
261
Review of Relevant Concepts
262
Proposed Algorithm
263
Orthogonal Distance from a Conic
263
Solving for the Orthogonal Point
265
Conic Fitting Algorithm
266
Experimental Results
268
Quadric Fitting
271
Discussion
273
References
273
Optical Inspection of Welding Seams
275
Introduction
275
Image Acquisition
276
Methods
277
Statistical Geometric Features
278
Specularity Features (SPEC)
279
Radial Encoding
281
Feature Analysis
282
Classification
282
Experiments and Results
282
Results of Feature Analysis
283
Results of Classification
285
Conclusions
287
References
287
A Multiscale Morphological Binarization Algorithm
289
Introduction
289
Related Work
290
Proposed Operator
291
Results
294
Binarization of Ill-Illuminated Images
295
Document Image Binarization
296
Other Possible Applications
300
Conclusions
300
References
300
On the Suitability of Different Features for Anomaly Detection in Wire Ropes
302
Introduction
302
Feature Extraction
304
Linear Prediction Based Features
305
Local Binary Pattern
306
Co-occurrence Features
306
Features Based on Pattern Irregularity
307
HOG Features
307
One-Class Classification
308
Decision Making
308
Experiments and Results
309
Comparison of Features
310
Robustness to Outliers
311
Generalization Ability
311
Discussion and Outlook
312
References
313
Importance Sampling as One Solution to the Data Association Problem in Multi-target Tracking
315
Introduction
315
Related Work
316
Rao-Blackwellized Resampling Particle Filter
317
Bayesian View of Tracking
318
Particle Filtering
318
Sampling New Configurations
319
Weighting
321
Resampling
321
Estimate of the State
322
Aspects of Multiple Associations
322
Parallel Association Sampling
322
Restricting the Associations
323
Implementation
324
Experimental Results
325
Simulation
326
Tracking of Soccer Players
327
Conclusions
330
References
330
Photo Repair and 3D Structure from Flatbed Scanners Using 4- and 2-Source Photometric Stereo
332
Introduction
332
Related Work
333
Normal Capture from Four Images
334
Photograph Repair Application
336
Defect Maps from Normals
337
Normal Component From Two Images
338
Infilling Algorithms
345
Additional Applications
346
Conclusions
347
References
347
Markerless Human Motion Capture Using Hierarchical Particle Swarm Optimisation
349
Introduction
349
Related Work
350
Particle Swarm Optimisation
351
PSO with Inertia
351
The Inertia Weight
352
Body Model and Cost Function
352
Body Model
352
Cost Function
353
HPSO Algorithm
353
Initialisation
354
Hierarchial Pose Estimation
354
Next-Frame Propagation
355
Experimental Results
355
Conclusions and Future Work
361
References
361
Textured Image Segmentation Using Active Contours
363
Introduction
363
Proposed Approach
364
Filters and Feature Selection
364
Local Spectral Histogram
367
Deducing Optimal Bin Size
368
Active Contour Based on Wasserstein Distance
369
Results
371
Conclusions
374
References
374
Author Index
376
Alle Preise verstehen sich inklusive der gesetzlichen MwSt.