We present an interface for quick and intuitive development of arbitrary, but physically correct, Bi-directional Reflectance Distribution Functions, or BRDFs. Our interface, referred to as BRDF-Shop, provides artists the ability to create a BRDF through positioning and manipulating highlights on a spherical canvas. We develop a novel mapping between painted highlights and specular lobes of an e...

Computer science students contemplating a career in graphics need to develop a visual sense, but traditional course topics do not meet this need. Visual analysis is a teaching technique developed for computer science instructors that helps impart this ability. Through the use of a few visual cues, students learn to visually identify surface algorithms, shaders and lighting techniques. An intera...

Rendering realistic objects at interactive frame rates is a necessary goal for many of today’s applications, especially computer games. However, most rendering engines used in these games induce certain limitations regarding moving of objects or the amount of lights used. We present a rendering system that helps overcome these limitations while the system is still able to render complex scenes ...

Normal mapping is a variant of bump mapping that is commonly used in computer games. It models complex surface variations by explicitly storing a surface normal in a texture map. However, it has not been used with precomputed radiance transfer (PRT), a technique for modeling an object’s response to a parameterized model of lighting, which enables interactive rendering of complex global illumina...

This paper presents an interactive technique for changing the illumination of objects in a real photograph. 1 Because lighting effects are very sensitive to surface normal perturbations but hard to automatically analyze, we rely on a pen-based interface to quickly draw an approximate normal map over a photo. The photo and the approximate normal map are then given as input to a novel algorithm t...

Interactive machine learning (IML) is proposed to train intelligent systems. This paper proposes a new approach to solve the feedback delay and low visibility problem of conventional IML handling large-scale data. The approach features high-speed feedback using an approximate nearest neighbor, process controllability by the user, and priority based visualization. The validity of the approach is...

The inherent control flexibility implied by solid-state lighting – united with the rich details offered by sensor networks – prompts us to rethink lighting control. In this research, we propose several techniques for measuring work surface illuminance and ambient light using a sensor network. The primary goal of this research is to measure work surface illuminance without distraction to the use...

This text gives a short overview of the features of the visualization software CLUCalc, and how this software may be used to teach various aspects of Geometric Algebra. CLUCalc is a stand-alone software tool that uses the 3d-graphics library OpenGL to visualize the geometric meaning of elements of Geometric Algebras. These visualizations can very easily be animated or made user-interactive. Apa...

We present the development vision of a range of interactive body-worn lighting systems for performance, play, rehabilitation and disor alteredability support. The systems combine experimental and off-the-shelf technologies to arrive at outcomes that require and inspire extended physical and expressive engagement, and afford a range of different learning opportunities. We discuss the context and...