Review. Stephen J. Guy


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1 Review Stephen J. Guy
2 Overview Pixar short Review last class Review course
3 Area of Graphics Image Processing Rendering Modeling Animation Misc
4 Area of Graphics Image Processing Rendering Modeling Animation
5 Image Processing What s a Pixel? A little square A 2D sample! So what? Continuous Image Digital Image
6 Sampling Theory and Images Sampling theory affects: Scaling and shrinking Rotating General transforms Filtering/Convolution Compositing
7 Aliasing What is aliasing? Many signals can fit any set of samples Solution? Limit the frequency based on number of samples Nyquist limit Blur Take More Samples
8 Image Processing Stateoftheart Computational Photography Texture Synthesis Image Completion Recoloring Lazy Snapping Photo tourism
9 Texture Synthesis Slide from A. Efros
10 Texture Synthesis p nonparametric sampling Input image Search the input image for all sufficiently similar neighborhoods and pick one match at random
11 Texture Synthesis for Hole Filling Fill in whole in onion skin order
12 Image Processing Stateoftheart Image Completion Criminisi et al. (CVPR 03) Automatic Inpainting
13 Image Processing Stateoftheart Image Completion Sun et al. (SIGGRAPH 05) User Driven
14 Image Processing Stateoftheart Image Completion Hays & Efros (SIGGRAPH 07) Using a Big Database
15 Timestamp Removal Automatic detection & removal of timestamp (Guy 08)
16 Digital Forensics Politically motivated texture synthesis! Automated duplicate detection Forgery detection
17 Area of Graphics Image Processing Rendering Modeling Animation
18 Rendering 2D View of 3D Geometry Rasterization Raytracing Lighting Models
19 3D to 2D Various Options
20 Parallel Views Oblique Cabinet Orthographic Views Cavalier Fortification Diagrams
21 Perspective Views
22 Transformations p(x,y,z) Modeling Transformation 3D World Coordinates Viewing Transformation Projection Transformation WindowtoViewport Transformation 22 p'(x,y ) 3D Object Coordinates 3D Camera Coordinates 2D Screen Coordinates 2D Image Coordinates Transformations map points from one coordinate system to another 3D World Coordinates 3D Camera Coordinates 10/6/2010 3D Object Coordinates
23 Rasterization
24 Ray Tracing Generate rays of light through pixels Find intersection point Compute Lighting
25 Lighting Phong Lighting Model Vaguely physical hack BlinnPhong approximation
26 Global Illumination Specular Reflections, Refractions, & Shadows DiffuseDiffuse Reflections, Caustics Radiosity Pathtracing Photon mapping
27
28
29
30 30 Henrik Wann Jensen
31 Volumetric Effects Shadows, Caustics, Lighting, etc.. can appear in air Light interacting with particles
32 More lighting.. Spectral Effects Atmospheric effects HDR Bloom.
33 Area of Graphics Image Processing Rendering Modeling Animation
34 Modeling Mathematical Modeling Procedural Modeling CSG Scene Graphs Splines/NURBS
35 Mathematical Modeling Raytraced Spheres & Triangles Raytraced Fractals
36 Procedural Modeling Create a set of rules to generate a model Terrain generation Lsystem Trees
37 Constructive Solid Geometry Union, Difference, Intersection of Primitives Easily raytraced 37 Union Difference Intersection
38 Scene Graphs Series of transforms relating primitives spatially
39 Splines Creating Curves with Control Points 3Dification Solid of Rotation Swept Surfrace
40 Bezier Curves in 3D Define Patches with Control Points
41 Subdivision Surfaces Recursively smooth polygon meshes 2D
42 Area of Graphics Image Processing Rendering Modeling Animation
43 Animation Keyframed/Interpolated Differential Equations Particle Systems
44 Animation Loop Animation Loop Compute new state Update display Must update faster than flicker/fusion threshold Shift visual state and position together Draw Picture Advance T Update State Shifted w/ Time
45 Shibuya Demo Crowd Simulation
46 Blender3D Free Modeling and Animation Software
47 Ogre3D Free 3D Rendering Engine
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