SIGGRAPH 99 Course #39: Image-Based Modeling and Rendering. Image-Based Modeling, Rendering, and Lighting SIGGRAPH 99 Course #39 Tuesday, August 10Room 152, Los Angeles Convention Center 8:30am - 5:00pm Official SIGGRAPH web site for this course See also Monday's SIGGRAPH 99 course on 3D Photography, organized by Brian Curless and Steve Seitz Course Abstract Image-based modeling and rendering differs from traditional graphics in that both the geometry and appearance of the scene are derived from real photographs.
Scope Topics include: computer vision and how it relates to image-based rendering techniques, and how to apply the techniques to animation and 3D navigation. Table of Contents 1. 2. 3. 4. 2D and 3D Image Warping (11:00, McMillan) Lunch (noon - 1:30pm) 5. 6. 7. 8. Other Resources: Special thanks to all the course speakers and to Tim Hawkins, Stephen Spencer, and Barb Helfer for their help in preparing these notes. Modeling and Rendering from Photographs. Contents. Panoramic Image Modeling Projects. Resources for Canoma users. The best free resource for all your computer needs. Conveying Shape and Features with Image-Based Relighting.
Abstract Hand-crafted illustrations are often more effective than photographs for conveying the shape and important features of an object, but they require expertise and time to produce. We describe an image compositing system and user interface that allow an artist to quickly and easily create technical illustrations from a set of photographs of an object taken from the same point of view under variable lighting conditions.
Our system uses a novel compositing process in which images are combined using spatially-varying light mattes, enabling the final lighting in each area of the composite to be manipulated independently. We describe an interface that provides for the painting of local lighting effects (e.g. shadows, highlights, and tangential lighting to reveal texture) directly onto the composite. We survey some of the techniques used in illustration and lighting design to convey the shape and features of objects and describe how our system can be used to apply these techniques. Image Based Modeling and Rendering Links.
Daniel Shiffman » Particle Systems. Particle Systems. By Allen Martin Introduction The term particle system is loosely defined in computer graphics. It has been used to describe modeling techniques, rendering techniques, and even types of animation. In fact, the definition of a particle system seems to depend on the application that it is being used for. The criteria that hold true for all particle systems are the following: Collection of particles - A particle system is composed of one or more individual particles. Stochastically defined attributes - The other common characteristic of all particle systems is the introduction of some type of random element. Using Particle Systems to Model Fire and Explosions Reeves initially used the term "particle system" to describe a method he used to create a sequence of images for the move Star Trek II: The Wrath of Khan.
Each object in Reeves particle system had the following attributes: Position Velocity (speed and direction) Color Lifetime Age Shape Size Transparency Particle Life Cycle Rendering Examples. A Procedural Approach to Authoring Solid Models - Cutler, Dorsey. Simulating plant growth.