Computer Graphics Motivation and Introduction

Transcription

1 Computer Graphics Motivation and Introduction Andrej FERKO Comenius University Bratislava May 2006, online

2 Background: Bratislava & Graz

3 Agenda 1. Introduction & Motivation 2. Computer Graphics Functions 3. Rendering Pipeline 4. What Is Possible? 5. Conclusions...

4 ? Does this exist?

5 ! KUBOID by P. Eliáš

6 KUBOID by P. Eliáš

7 Communication Interfaces Author - Application Programmer - GS Author - User WWW APP GS WS Eg.. OpenGL Workstation What is interesting for users?

8 Ambiguity Interesting Unlimited Communication A S AP GS WS H AH! AHA! HAHA! Arthur KOESTLER, 1964

9 Web Graphics Human visual system fed through GUI perceives the content dominantly through web pages WWW AP GS WS GUI HVS

10 Parallel Use of Space in Graz... Real world photo by A. F., Graz 2001

11 Where is the Ambiguity? (Very Individual)?

12 Where is the Ambiguity?

13 Where is the Ambiguity? Ambassadors by H. Hobein, jr.

14 Pavol Elias gives the construction of existing paradoxical 3D objects by cutting them into unambiguous parts Here are two unambiguous parts

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16 Towards the Troublems... VRML world by M. Grabner, TU Graz 2002

17 Categories of Ambiguous Web Graphics Categories of ambiguous messages created and communicated by web graphics: static (stills) and dynamic (animations, interactive 3D worlds) One view 2+ views N views (using mirrors)

18 On Model of a Human Being The Act of Creation (creatology): A S H AP GS WS AH! AHA! HAHA! Association >> bissociation Arthur KOESTLER: no labyrinth, no mouse, just bissociating two contexts

19 Human Human Interface The Act of Creation (creatology): A S H AP GS WS AH! AHA! HAHA! The same is interesting without web Art, scientific discovery, comic inspiration (Humor) Note that Humor is undefined like Set or Shape

20 Serious Unambiguous Messages White box Black Box: known to unknown Knowledge Increase (electric circuits CFD Big Bang or humor theory) Labyrinth and Mouse (standard brainstorming creatology)

21 On Model of a Human Being Communication World Champions: NLP V A K O G Visual Auditory Kinesthetic Olfactory Gustatory John GRINDER & Richard BANDLER, NLP = Neurolinguistic Programming

22 On Model of a Human Being Input Completion: Add Symbolic Channel S Symbolic (glyphs,.exe) V Visual A Auditory K Kinesthetic O Olfactory G Gustatory

23 Agenda 1. Introduction & Motivation 2. Computer Graphics Functions 3. Rendering Pipeline 4. What Is Possible? 5. Conclusions...

24 Compare Reality - Synthesis

25 Photography ~ computer graphics Controlled Error: Model, Algorithm Solution ISO: Computer graphics: methods & techniques for construction, manipulation, storage and displaying pictures using computer.

26 CG Functional Unit known model wireframe or surface representation: geometric tranformations, visibility calculations, interpolations and raster manipulations photorealistic quality: the lighting and rendering equations solved to simulate the illumination, shading, shadows, natural and synthetic textures and colors viewing: parallel or perspective projections) create the image space animation: kinematic & dynamic data compute/capture, hierarchy of motions, interpolations in the scene and in the resulting sequence of frames (fps)

27 Photography ~ computer graphics ISO: Computer graphics: methods & techniques for construction, manipulation, storage and displaying pictures using computer. [Dobkin97]: Computer graphics is a radiometrically weighted counterpart of computational geometry 8D (x, y, z, t) (r, g, b, transparency) Schnellkurs

28 Serious Unambiguous Messages White box Black Box: known to unknown Problem, model, algorithm, software, results Knowledge++ (electric circuits CFD Big Bang/humor theory) Labyrinth and Mouse (standard brainstorming creatology)

29 On Model of a Human Being Problem Application Program - Solution AP GS WS GUI HVS

30 On Model of a Human Being Application Programmer - GS Author - User AP GS WS Triple Schizophrenia in Computer Graphics Reference Model (ISO)

31 Science Discovery

32 Design Invention

33 SIGGRAPH Slide Show

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39 Graphics vs. Visualization Controlled Error: Model, Algorithm Solution AP GS WS Computer Graphics >> Visualization ε > 0 >> ε > infinity

40 Agenda 1. Introduction & Motivation 2. Computer Graphics Functions 3. Rendering Pipeline 4. What Is Possible? 5. Conclusions...

41 Categories of Ambiguous Web Graphics Categories of ambiguous messages created and communicated by web graphics: static (stills) and dynamic (animations, interactive 3D worlds) One view 2+ views N views (using mirrors)

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67 Towards the Troublems... Real world photo from P. Bourkes homepage

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72 Agenda 1. On Model of a Human Being 2. Rennaissance Analogy 3. Towards the Troublems of Humor Theory 4. Conclusions AH!

73 Earth in the Night AHA!

74 HAHA! Parallel Use of Space in Graz... Real world photo by A. F., Graz 2001

75 Agenda 1. Introduction & Motivation 2. Computer Graphics Functions 3. Rendering Pipeline 4. What Is Possible? 5. Conclusions...

76 On Model of a Human Being Controlled Error: Model, Algorithm Solution AP GS WS Computer Graphics >> Visualization ε > 0 >> ε > infinity

77 Etruscan Liver, Cholera in London Sheep Liver & Names of Gods The idea of representing data visually has been around for much longer than computer based visualisation. The linking of the spread of cholera to water supply provides an early example of the use of visualisation in problem analysis. During the cholera outbreak in London, Dr. John Snow identified a large grouping in the Soho area. He went on to plot the homes of the 500 victims who died in the first 10 days of September 1854 on a map of the area. This simple representation of the data he had collected showed that the grouping of cholera sufferers in the area was centred round a particular water pump. Investigation of this water pump established that it had been contaminated by a leaking cesspool.

78 Opel OMEGA

79 . Bratislava

80 Chatam Sófer M. by J. Krizik WCH?

81 Virtual Heart of Central Europe, Culture 2000 Awarded by EuroPrix Quality Seal keur, 150 keur from EC, ready to submit Pirelli Award follow-up (SK, SI, PL, CZ), submitted, 256 keur

82 Navigation&Cooperation in VEs: Virtual Bratislava ( ) SKK, SKK from Slovak government, APVT agency Follow-up Key researchers M. Zimanyi, S. Stanek & P. Kubini

83 Metaphor Confrontation of Meanings Pritaca, comparison... For example, desktop metaphor, GUI...Sweeping, D&C, Simulated Annealing... Recall Koestler & bisociation

84 March of the Napoleon Army 1D

85 Volume.. Surface sampled data geometric model 3D reconstruction discrete voxel space isosurfacing voxelization image synthesis continuous geometric space volume rendering surface rendering image 3D

86 MatLab: mored

87 Viz-Course Contents 1. Introduction, motivation reference model, scenarios, graphics and visualization difference 2. Data data types, coordinate representations, data connectivity 3. Mathematical models and languages 4. Representation scalar, vector, tensor, multivariate, using color, glyphs 5. Visualization software 6. Information Visualization graph drawing, algorithm animation, 7. Recent Directions data sonification, visualizing relativity, NPR in scientific visualization...

88 Visualization of Data 1D, 2D, 3D: Rendering 4D: Animation (Juran.) nd - in general: Open Problem Glyphs, faces by statistician Herman Chernoff other metaphors: terrain, garden, IFS...

89 Glyphs UNICODE glyphs: 7, α, β, γ, δ, Σ, θ, ω?, *,, symbolic information Visualization glyphs

90 Visualization Glyphs

91 Chernoff Faces 20D

92 Facial Representation of nd Data? 362D Susan Brennan, 1985 and

93 Reagan.

94 Parallel Coordinates INSELBERG, A. DIMSDALE, B "Parallel Coordinates: A Tool for Visualizing Multi- Dimensional Geometry," Proc. of the First IEEE Conference on Visualization. 361 (1990).

95 Volumendarstellung (19), Dr. Bartz Voxelintensitäten Gradient Skew 2. Ableitung Kurtosis

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97 Used even in movies: CSIs, Assa, Hackers 2, Amelie de Montmartre

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100 Visualization Magic Magic Mirror by Jerome Grosjean et al. Magic Tunnel by Bernhard Reitinger et al.

101 Chernoff Faces 20D

102 NPR Visualization (SIGGRAPH 2001)

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104 Final Fantasy

105 IMAGINATION/VR

106 Xmas Tree in Heaven Christmas Tree Awarded Case Study, TU Vienna

107 Xmas Tree in Heaven

108 Conclusions... pg.netgraphics.sk Computer graphics reference model Visual information processing motivation and methodology Thank You for Your attention

109 Computer Graphics Motivation and Introduction Andrej FERKO Comenius University Bratislava May 2006, online