3D Pac-Man

PacMan 3D
Projection Mapped PacMan 3D at Telfair Museum in Savannah, GA

Clement Shimizu through Elumenati
Concept by Keita Takahashi
Curated by Babycastles
Omnifocus Projection system by The Elumenati
Pacman is property of Namco

Background:
Keita Takahashi (The creator of Katamari Damacy) had a dream about classic video games being played in unusual ways. One of his ideas was playing Pac-man across the walls and ceiling of a room. I volunteered to realize that dream for him! It involved re-writing pac-man from scratch to run in 3D across maze that follows the shape of the room. I adapted the graphics and gameplay for the museum using an Elumenati Omnifocus projector.

PacMan-On-Walls
Keita Takhashi’s concept art for projection mapping the screen of PacMan to the walls and ceiling at BabyCastles Summit.
Fisheye Projection Projection Mapping Algorithm
This is what the game looks like before projection through the fisheye lens.
Fisheye Lens Showing the Pacman Maze
Elumenati loaned a very special fisheye projector to pull off for the game. It only required a single projector.
Mrs. Pac-Man
Mrs. Pac-Man is more than Pac-Man with a bow. However, the original author Toru Iwatani asked us to discontinue Mrs. PacMan and only use Mr. PacMan.

News:
http://kotaku.com/5938909/ms-pac-man-gets-even-more-difficult-and-amazing-when-it-takes-over-an-entire-room (Kotaku story with video)

http://babycastles.com/website/babycastles-summit-with-keita-takahashi/

http://kotaku.com/5930196/some-of-keita-takhashis-video-game-dreams-will-come-true-this-summer-and-you-can-play-them

More photos from Clement’s Facebook:
Museum of Arts and Design, New York, NY

Pulse 2013 at Telfair Museum, Savannah, GA

Surround View Flight Simulator

A.C.E.S. Surround View Flight Simulator powers a giant wrap around screen using a single projector. In this video, we illustrate Lockheed Martin’s Prepar3D training software in a panoramic projection system using Elumenati’s Omnimap Software.

Mike Pohl and A.C.E.S. Flight Simulation
Clement Shimizu of The Elumenati
Jason Echols of Lockheed Martin

Stop Motion Christmas : Munny’s Night Out

By Clement Shimizu
With Denny Park, Nick Lee, Helena Shimizu, and James Sommerfeld
Shot on location at Tomodachi.us
[CC Music] Wax Taylor – Say Yes Suonho Mix and Clockwork Song

A *Munny escapes his box at the toy store and goes on the adventure of his life. He explores the toy store and runs wild through the shopping mall decorated for the holidays. Inspired by Corduroy by Don Freeman and also Jigglypuff from Pokemon.

*What is a Munny? A Munny is a blank vinyl doll by designer toy company Kid Robot that is easy to customize with paint, clay, and other art tools.

Mini Siege Warfare

This is a test of some of the mini siege warfare props made for Janaki Ranpura’s Jim Henson grant proposal. John Austin’s book Mini Weapons of Mass Destruction was used as starting point for the designs of the siege catapult and claymore mine. The trebuchet is a counterweight design specifically tuned to not launch far to allow it to work in the confines of a small puppet show.

By: Clement Shimizu
For: Janaki Ranpura
Music: Olli Johnson on the Baritone Uke
Puppeteers: Dwane Blake Love and Hannah Rivenburgh

PhD. Thesis: Computer Aided Design for Color Appearance

Computer Aided Design of Automotive Color at Ford
Computer Aided Design of Color at Ford Automotive

PhD. Thesis: Computer Aided Design for Color Appearance
By: Clement Shimizu
Advisor: Gary W. Meyer

PhD. Thesis submitted in partial fulfillment of the requirements for the final defense of degree of Doctor of Philosophy in Computer Science.

ABSTRACT:
This research documents the creation and application of the first complete computer aided design system for color appearance. Although computer graphics and computer aided design are commonly used for geometric shape design, there are few computer tools for the design of color appearance and surface finish. Advances in computer graphics technology make it possible to create color appearance design tools analogous to those available for object and surface design. In this thesis, the fundamental components of computer aided geometric design (CAD) are applied to computer aided color appearance design (CACAD) including visualization, design, analysis/optimization, and scanning/prototyping tools. The problem domain was metallic and pearlescent automotive finishes, but the system architecture could be applied to other problems in color appearance design.
We develop a CACAD program for designing hypothetical goniochromatic colors by creating a design interface for a model of appearance. This interface controls all of the aspects of a metallic surface finish relevant to the designer including gloss and color shift. We suggest a rendering engine that combines the interactive control of a reflection model with the complex real-time lighting provided by an environment map. This allows the user to interactive design a reflection model and see the changes immediately on a fully lit 3D object. Creative design interfaces are proposed that allow color stylists to take advantage of their training in the fashion, art, and other design industries. We illustrate the power of creative BRDF design interfaces by creating a virtual mood board that allows direct selection of the reflection model parameters from pictures, an image based BRDF tweaker for adjusting color appearance directly on a 3D object, and a sketch based design interface that can work with hand drawn concept art.
We study the color mismatches that result from geometric misalignment and why they are accentuated by the use of metallic and pearlescent paints with goniochromatic properties. We propose a metric for determining when the color difference is large enough for the misalignment to become apparent and illustrate a technique for selecting a paint that matches the adjacent part and creates the illusion of geometric continuity even though the two parts are misaligned. Finally, the CACAD system was connected to a paint formulation system to formulate and generate physical samples of color and surface finish designs in the same fashion that 3D printers can fabricate physical objects from CAD specifications. A series of experiments demonstrate the CACAD system’s maturity by showing that it is effective at designing and formulating paints in a wide variety of real world situations.

Metallic car paint shader under global illumination
Metallic car paint shader under global illumination

BIBTEX CITATION
@PHDTHESIS{shimizu0020,
author = {Clement Shimizu},
title = {Computer Aided Design for Color Appearance},
school = {University of Minnesota Computer Science and Engineering},
address = {Minneapolis, MN, USA},
year = {2010},
}

Color Styling Tools

Title: Color Styling Tools
Authors: Clement Shimizu and Gary W. Meyer
In 18th Color and Imaging Conference 2010 (CIC11)

Abstract: Creative tools are proposed that allow color stylists to take advantage of their training in the art and design fields. A simple reflection model is employed that has the minimum number of free parameters required to design solid and metallic color finishes from conceptualization to fabrication. The parameters correspond to color specification terms familiar to designers such as face color, flop color, travel, and gloss. We demonstrate how the reflection model can also be used to develop effective interfaces for color stylists. We create a virtual mood board that allows direct selection of the reflection model parameters from pictures. We also develop an image based BRDF tweaker for adjusting color appearance directly on a 3D object.

Virtual Mood Board For Selecting Parameters to BRDF Color (Photo of Jessica Stam by Craig McDean for Dior)
Virtual Mood Board For Selecting Parameters to BRDF Color (Photo of Jessica Stam by Craig McDean for Dior)
Spot color styler for tweaking color directly on a 3D object
Spot color styler for tweaking color directly on a 3D object
Example of physical mood board created by a stylist for communicating color treatment concepts
Example of physical mood board created by a stylist for communicating color treatment concepts (Created by Molly Roark)

BIBTEX CITATION
@inproceedings{shimizu0011,
author = {Clement Shimizu and Gary W. Meyer},
title = {Color Styling Tools},
year = {2010},
pages = {272-279},
booktitle = {18th Color and Imaging Conference}
}

#DrawArt for @MuseumPaige

Love for a farmer's Wife, Paige Dansinger. Original artist Kitagawa Utamaro I
Love for a farmer’s Wife, Paige Dansinger. Original artist Kitagawa Utamaro I
Paige Dansinger, Woman Putting on Face Powder, (Original by Kitagawa Utamaro)
Paige Dansinger, Woman Putting on Face Powder, (Original by Kitagawa Utamaro)


Artist: Paige Dansinger
Programmer: Dr. Clement Shimizu

#DrawArt is an application created to help Paige Dansinger teach art history in a new and engaging way. The artist digitally paints historical works of art using an iPad. The software records the painting and a animation that can be replayed from a blank canvas.
http://drawart.museumpaige.com/

A Computer Graphics System for Examining Paint Color Collections

Benjamin More Paint Selector
Benjamin More Paint Selector

Title: A Computer Graphics System for Examining Paint Color Collections
Authors: Seth Berrier, Gary W. Meyer, and Clement Shimizu
In 11th Congress of the International Colour Association (AIC) 2009, Sydney (AIC 2009)

Abstract: A computer graphic program for organizing and displaying the colors in a paint collection is presented. A virtual representation for the traditional color card fan deck is described. This interactive program provides a lightness, chroma and hue interface for selecting a color from the collection. Software for visualizing a paint color on a three dimensional surface is also discussed. This tool allows the user to evaluate the sheen of a solid paint color and the travel of a metallic or pearlescent paint color.


BIBTEX CITATION
@inproceedings{shimizu0019,
author = {Seth Berrier and Gary W. Meyer and Clement Shimizu},
title = {A Computer Graphics System for Examining Paint Color Collections},
year = {2009},
pages = {},
booktitle = {AIC 2009},
}

Predicting and Fixing Geometric Color Mismatches

Illustration of a color mismatch due to geometric misalignment of a car bumper
Why do car bumpers often look like they are painted the wrong color, even if the paint is a perfect match? Geometric misalignment can cause significant perceived color mismatches especially in metallic automotive paints.
Title: Predicting and Fixing Geometric Color Mismatches
Authors: Clement Shimizu and Gary W. Meyer
In 11th Congress of the International Colour Association, Sydney (AIC 2009)

Abstract: Color mismatches that result from geometric misalignment are studied. Differences in color can result when adjacent parts of an object are coated with the same paint but are not aligned to create a continuous geometric surface. The color difference that results due to shading can be accentuated by the use of metallic and pearlescent paints with goniochromatic properties. A metric is developed for determining when the color difference is large enough for the misalignment to become apparent. A technique is also presented for selecting a paint that matches the adjacent part and creates the illusion of geometric continuity even though the two parts are misaligned.

BIBTEX CITATION
@inproceedings{shimizu0013,
author = {Clement Shimizu and Gary W. Meyer},
title = {Predicting and Fixing Geometric Color Mismatches},
year = {2009},
booktitle = {AIC 2009},
}

Valentine’s Day Photo Funbooth

By: Hal Schuler and Clement Shimizu

These animations are a result of a collaboration between Hal Schuler (Timesquid at the Time, but now known as Hal Lovemelt of Playatta) and Clement Shimizu for a Valentine’s day party hosted by DJ Real Talk Radio. We created a photo booth that would superimpose party attendants into looping animations. Party attendants enjoyed the animations at the party and had the option to download the results afterwards.

Each image links to the animated GIF with background music on *YTMND:

The Hot Dog Lady
The Hot Dog Lady
3D Makes Me Sick
3D Makes Me Sick
Coco and Breezy
Coco and Breezy
Send Me An Angel
Send Me An Angel

*Background Info: YTMND is a social website where users create and comment on looping animations juxtaposed with looping sounds, often both out of context. Many seeds of online culture have percolated through YTMND as fads becoming fully developed self replicating internet memes in the process. The letters YTMND is an acronym for “You’re the Man Now, Dog”, a quote from Sean Connery in the movie Finding Forester that is bizarrely taken out of context as title of the website.

A Tendercakes’ Kissmas

Tendercakes
Tendercakes DJ’s putting on makeup.

“Bust out the strawberry lip gloss and meet us under the mistletoe! We’ve turned boring ol’ Christmas on its ear this year with a sexy holiday party – Tendercakes style!”

Description: A Tendercakes’ Kissmas was a kissing centric video for a Kissing Themed Xmas Party, hosted by the fabulous DJ Duo Tendercakes!
By: Clement Shimizu
Director of Photography: Stephen Stephens
Featuring: Tendercakes and Beatrix Jar.   (Clip of Snails from Claude Nuridsany’s Microcosmos used without permission)
Music Selection: Tendercakes and Millions Billions

=OxO=

Automotive Spray Paint Simulation

Title: Automotive Spray Paint Simulation
Authors: Jonathan Konieczny, John Heckman, Gary W. Meyer, Marty Manyen, Marty Rabens, and Clement Shimizu
In International Symposium on Visual Computing 2008 (ISVC ’08)

Abstract: A system is introduced for the simulation of spray painting. Head mounted display goggles are combined with a tracking system to allow users to paint a virtual surface with a spray gun. Ray tracing is used to simulate droplets landing on the surface of the object, allowing arbitrary shapes and spray gun patterns to be used. This system is combined with previous research on spray gun characteristics to provide a realistic simulation of the spray paint including the effects of viscosity, air pressure, and paint pressure. The simulation provides two different output modes: a non-photorealistic display that gives a visual representation of how much paint has landed on the surface, and a photorealistic simulation of how the paint would actually look on the object once it has dried. Useful feedback values such as overspray are given. Experiments were performed to validate the system.

BIBTEX CITATION
@InProceedings{shimizu0008,
title = {Automotive Spray Paint Simulation},
author = {Jonathan Konieczny and John Heckman and Gary W. Meyer and Marty Manyen and Marty Rabens and Clement Shimizu},
booktitle = {ISVC '08},
year = {2008},
pages = {998--1007},
}

OmniMap: Projective Perspective Mapping API for Non-planar Immersive Display Surfaces

Fisheye Projection Mapping
Fisheye Projection Mapping
Title: OmniMap: Projective Perspective Mapping API for Non-planar Immersive Display Surfaces
Authors: Clement Shimizu, Jim Terhorst, and David McConville
In International Symposium on Visual Computing 2008 (ISVC ’08)

Abstract: Typical video projection systems display rectangular images on flat screens. Optical and perspective correction techniques must be employed to produce undistorted output on non-planar display surfaces. A two-pass algorithm, called projective perspective mapping, is a solution well suited for use with commodity graphics hardware. This algorithm is implemented in the OmniMap API providing an extensible, reusable C++ interface for porting 3D engines to wide field-of-view, non-planar displays. This API is shown to be easily integrated into a wide variety of 3D applications.

Note: The design and implementation of OmniMap was done with D’nardo Colucci for the Elumenati. Learn more about immersive projection systems at:
The Elumenati
Geodome

BIBTEX
@InProceedings{shimizu0009,
title = {OmniMap: Projective Perspective Mapping API for Non-planar Immersive Display Surfaces},
author = {Clement Shimizu and Jim Terhorst and David McConville},
booktitle = {ISVC '08},
year = {2008},
pages = {},
}

VR Spray Painting for Training and Design

The end result of using the system to spray paint a car hood. Both directionally diffuse and gloss layers have been applied. In this case, a photorealistic image of how the paint would look when dry is displayed to the user. Useful information such as overspray, and percentage covererage is given to the user. This makes the system ideal for training, as both visual and numeric feedback is given to the trainee.
The end result of using the system to spray paint a car hood. Both directionally diffuse and gloss layers have been applied. In this case, a photorealistic image of how the paint would look when dry is displayed to the user. Useful information such as overspray, and percentage covererage is given to the user. This makes the system ideal for training, as both visual and numeric feedback is given to the trainee.

Title: VR Spray Painting for Training and Design
Authors: Jonathan Konieczny, Gary W. Meyer, Clement Shimizu, John Heckman, Marty Manyen, and Marty Rabens
In ACM Virtual Reality Software and Technology 2008 (VRST ’08)

A system is introduced for the simulation of spray painting. Head mounted display goggles are combined with a tracking system to allow users to paint a virtual surface with a spray gun. Ray tracing is used to simulate droplets landing on the surface of the object, allowing arbitrary shapes and spray gun patterns to be used. This system is combined with previous research on spray gun characteristics to provide a realistic simulation of the spray paint including the effects of viscosity, air pressure, and paint pressure. The simulation provides two different output modes: a non-photorealistic display that gives a visual representation of how much paint has landed on the surface, and a photorealistic simulation of how the paint would actually look on the object once it dried. Useful feedback values such as overspray are given. Experiments were performed to validate the system.

BIBTEX CITATION
@InProceedings{shimizu00017,
title = {VR Spray Painting for Training and Design},
author = {Jonathan Konieczny and Gary W. Meyer and Clement Shimizu and John Heckman and Marty Manyen, and Marty Rabens},
booktitle = {VRST '08},
year = {2008},
pages = {293--294},
}

Creating Metallic Color Sequences for an Architectural Wall

Architectural Exhibit at the Goldstein Museum

Title: Creating Metallic Color Sequences for an Architectural Wall
Authors: Seth Berrier, Gary Meyer, and Clement Shimizu
In International Conference of the Association for Computer-Aided Design in Architecture (ACADIA ’08)

Abstract: A metallic paint scheme for an architectural wall is created using computer aided color appearance design techniques. New computer graphic hardware that allows real-time rendering of complex reflectance functions is employed to produce photo-realistic images of the metallic paint applied to the surface of the wall. An interpolation scheme is developed that permits one and two dimensional metallic shade sequences to be determined between individual bricks in a single row of the wall and between the complete rows of bricks that compose the wall. Paint formulation software, originally developed for auto refinish applications, is used to determine the paint mixtures necessary to realize the metallic colors in the design. A prototype of the wall is constructed and exhibited in a museum gallery.

BIBTEX CITATION
@INPROCEEDINGS{shimizu0007,
author = {Seth Berrier and Gary Meyer and Clement Shimizu}
title = {Creating Metallic Color Sequences for an Architectural Wall},
booktitle = {ACADIA '08},
year = {2008},
pages = {308--313}
}

The Wall of Inspiration: A Computer Aided Color Selection System

Title: The Wall of Inspiration: A Computer Aided Color Selection System
Authors: Seth Berrier, Clement Shimizu, Patrick Chong, D’nardo Colucci, and Gary Meyer
In Fifth International Conference on Computer Graphics, Imaging and Visualization, 2008 (CGIV 08)

Abstract: Computer graphics hardware and software is used to create a new set of tools for selecting a household paint color. Important surface reflection effects, such as gloss and pearlescence, are rendered in real time using pixel shading hardware. Unlike traditional paint chips, this feature permits colors to be evaluated on three dimensional shapes and in different surface finishes. A novel set of color navigation tools is provided to allow the user to visualize the color collection supplied by the manufacturer, to select subsets of the collection for consideration, and to match or modify an existing color sample. This interface is easier to use and less expensive to produce than the fan deck found in most paint stores. The pictures produced by the software are displayed on a four panel video wall. The large size of the wall allows the user to evaluate the appearance of the color at a scale similar to its final dimension once it has been applied to a surface.

BIBTEX CITATION
@InProceedings{shimizu0006,
title = {The Wall of Inspiration: A Computer Aided Color Selection System},
author = {Seth Berrier and Clement Shimizu and Patrick Chong and D'nardo Colucci and Gary Meyer},
booktitle = {CGIV '08},
year = {2008},
pages = {132--137},
}

MN Artists Mashup

Clement Shimizu
Kate Iverson
all of the artists from www.mnartists.org
Created with support from Elumenati Immersive Projection Design

http://www.elumenati.com/

Mix by the Moongoons http://Moongoons.com/

The MN Artists mashup project was created for mnartists.org, a project of the Walker Art Center, as part of the “Festival of Appropriation” exhibit at The Soap Factory curated by Jonathan Nelson and Kate Iverson and sponsored by McKnight foundation. Hundreds of thousands of art images from tens of thousands of artists were spidered from the mnartists.org site to create a 3D video mashup. The MN Artists mashup was shown as part of the Festival Appropriation for the duration of the exhibit at the Soap Factory, as well as at the Bakken Museum and the Walker Art Center in the Fall of 2007.

The original video was shown at 2560×1024 displayed across two digital video projectors

Houminn Practice’s Cloak Wall

Architectural Facade by Houminn Practice featuring a progression of Metallic surface coatings selected with Computer Aided Color Appearance Design tools
Architectural Facade by Houminn Practice featuring a progression of Metallic surface coatings selected with Computer Aided Color Appearance Design tools

Title: Houminn Practice’s Cloak Wall
Team: Marc Swackhamer of HouMinn Practice; Seth Berrier, Clement Shimizu, and Gary Meyer of the University of Minnesota; Allan Rodriguez and David Griffus of DuPont Performance Coatings

The prototype of the Cloak Wall was exhibited in the Goldstein Museum of Design. The key colors in the color scheme we selected directly from the photograph of the intended site using the BRDF Design Suite and interpolated mathematically.

Susannah’s Mouth

Sexy mouth eating gummy worm
Susannah’s Mouth from Dead Sexy event installation

By: Clement Shimizu and Kate Iverson
Featuring: Susannah

Description: Susannah’s Mouth was produced for an art party called Dead Sexy 2 at Kingman Studios-known for its wild and hedonistic atmosphere. This video is part of a series of party videos and art installations that focus on a single body part to the point of fetish.

=OxO=

This is the Color

Spot Color Preview Tool For Specialty Color Treatments
Spot Color Preview Tool For Specialty Color Treatments

Title: This is the Color : A Spot Color Preview Tool For Specialty Color Treatments
By: Clement Shimizu, Sarah Steil, Nicole Steinhofer of the University of Minnesota

When creating product packaging, the appearance of specialty color treatments, like foils and embossing, is unknown until the design is sent through the printing press. Mistakes are costly, if not impossible, to correct at this stage. A software prototype was created to explore the utility of an Adobe Illustrator plugin to show a realistic preview of specialty foil and gloss spot colors.

Metallic Foil Logo Designer

Design Housing and Apparel Logo contest
Metallic Foil Design Software Workspace

Software Title: Metallic Foil Logo Designer
By: Clement Shimizu and Sarah Steil

Sarah Steil(then graduate student from Design Housing and Apparel (DHA)) and I partnered to win first prize in a logo design contest for the University of Minnesota. Instead of creating a single static logo, we created a whole software work-space for rapid prototyping of metallic foil logo designs.

Personal note: I enjoyed the privilege of taking three courses in the UMN DHA program as a graduate student of Computer Science. This particular project was a done as part of a project where Computer Science students were paired with Design students. The student pairs created collaborative work in the area of color in computer graphics and design. I have very high recommendations for educational programs that provide opportunities where creative minds are joined with technical minds to realize ideas that would be impossible otherwise.

A Handheld Flexible Display System

Projection mapping a brain onto a flexible rear projection screen.
A Demonstration of the Flexible Display Device

Title: A Handheld Flexible Display System
Authors: Jonathan Konieczny, Clement Shimizu, Gary Meyer, and D’nardo Colucci
In Proceedings of IEEE Visualization 2005

Abstract: A new close range virtual reality system is introduced that allows intuitive and immersive user interaction with computer generated objects. A projector with a special spherical lens is combined with a flexible, tracked rear projection screen that users hold in their hands. Unlike normal projectors, the spherical lens allows for a 180 degree field of view and nearly infinite depth of focus. This allows the user to move the screen around the environment and use it as a virtual “slice” to examine the interior of 3D volumes. This provides a concrete correspondence between the virtual representation of the 3D volume and how that volume would actually appear if its real counterpart was sliced open. The screen can also be used as a “magic window” to view the mesh of the volume from different angles prior to taking cross sections of it. Real time rendering of the desired 3D volume or mesh is accomplished using current graphics hardware. Additional applications of the system are also discussed.


BIBTEX CITATION
@InProceedings{shimizu0005,
year = {2005},
title = {A Handheld Flexible Display System},
author = {Jonathan Konieczny and Clement Shimizu and Gary Meyer and D'nardo Colucci},
organization = {IEEE Computer Society},
month = oct,
booktitle = {Proceedings of IEEE Visualization 2005},
publisher = {IEEE Computer Society Press},
}

The Wall of Inspiration

Benjamin Moore Wall of Inspiration for previewing architectural color finishes
Benjamin Moore Wall of Inspiration for previewing architectural color finishes

Title: The Wall of Inspiration
University of Minnesota Team: Seth Berrier, Clement Shimizu, Gary Meyer, and D’nardo Colucci
Benjamin Moore Paints Team: Patrick Chong and Carl Minchew

The Wall of Inspiration was a joint project between the University of Minnesota and Benjamin Moore paints. Customers are often dissatisfied with how different a color looks on a large wall compared to a small color chip. The purpose of the project was to explore the question of electronic color on a large scale display device. By carefully utilizing gloss and BRDF measurements we were able to create a realistic shader that simulated the appearance of paint given the various gloss levels.

Computer aided design of automotive finishes

Standards for measuring metallic automotive paints
Standards for measuring metallic automotive paints

Title: Computer aided design of automotive finishes
Authors: Gary W. Meyer, Clement Shimizu, Alan Eggly, David Fischer, Jim King, and Allan Rodriguez
In 11th Congress of the International Colour Association (AIC) 2005, Newcastle Gateshead, United Kingdom

Abstract: The principles of computer aided design were applied to the creation of new automotive finishes. A computer graphic program was written that allows the user to interactively adjust the surface reflection properties of an automotive paint and visualize the appearance of that paint on a three dimensional surface. The program gives a designer intuitive controls over a second order polynomial that defines the color of the paint at a series of aspecular angles. An automotive stylist was permitted to use the program and design three new automotive paints that had never been manufactured. Formulations for the designed paints were determined by inputting the desired aspecular measurements into an automotive refinish system. The new paints were mixed and sprayed on metal panels. Comparisons between the actual and simulated finishes were judged to be adequate by those involved in the experiment.

BIBTEX CITATION
@inproceedings{shimizu0004,
author = {Gary W. Meyer and Clement Shimizu and Alan Eggly and David Fischer and Jim King and Allan Rodriguez},
title = {Computer aided design of automotive finishes},
booktitle = {Proceedings of AIC Colour 05},
year = {2005},
pages = {685--688}
}

Computational Automotive Color Appearance

Controlled Lighting for Comparison between Computer Display and manufactured paint prototypes used a SpectraLight Color temperate and spectrum controlled lamp
Controlled Lighting for Comparison between Computer Display and manufactured paint prototypes used a SpectraLight Color temperate and spectrum controlled lamp
Title: Computational Automotive Color Appearance
Authors: Gary W. Meyer and Clement Shimizu
In Computational Aesthetics in Graphics, Visualization and Imaging, 2005, Girona, Spain

Abstract: A computer graphic system has been developed that permits the interactive design of new automotive finishes. The software makes use of a reflection model for car paint that is based on industry standards for measuring the appearance characteristics of the paint. These measurements include gloss for the clearcoat and three aspecular measurements for the metallic basecoat. The program interface provides a means for altering the reflectance properties of the paint and for visualizing the effect of those changes on the color appearance of the car. The desired aspecular measurements for the new paint can be input to a paint formulation system so that the paint can be manufactured. A test of the system shows good correspondence between the designed and the fabricated paint.

BIBTEX CITIATION
@inproceedings{shimizu0003,
author = {Gary W. Meyer and Clement Shimizu},
title = {Computational Automotive Color Appearance},
booktitle = {Computational Aesthetics in Graphics, Visualization, and Imaging},
year = {2005},
}

Computer Aided Color Appearance Design Using Environment Map Based Lighting

Material Design in Environment Map Based Lighting
Material Design in Environment Map Based Lighting

Title: Computer Aided Color Appearance Design Using Environment Map Based Lighting
Authors: Clement Shimizu and Gary W. Meyer
In Eurographics Symposium on Computational Aesthetics in Graphics, Visualization, and Imaging, 2005 (Girona, Spain)

Abstract: A BRDF approximation is developed that is suitable for interactive color appearance design in direct lighting provided by environment maps. The BRDFs are approximated as a linear combination of cosine lobes with a fixed set of specular exponents. A nonlinear optimization routine is used to fit the cosine lobes to BRDFs appropriate for a specific color appearance design application: automotive paint. Modification and rendering of the BRDF is made possible by linearly combining prefiltered environment maps for each cosine lobe in real time.

BIBTEX CITATION
@inproceedings{shimizu0002,
author = {Clement Shimizu and Gary W. Meyer},
title = {Computer Aided Color Appearance Design using Environment Map Based Lighting},
year = {2005},
booktitle = {Eurographics Symposium on Computational Aesthetics in Graphics, Visualization, and Imaging},
pages = {223--230},
month = jun,
}

Interactive Goniochromatic Color Design

BRDF Designer
A user interface for designing the BRDF of automotive paint provides control over a clamped second order polynomial that describes the color from multiple viewpoints. The reflectance of the paint is plotted in Lab space across “Aspecular” angles.

Title: Interactive Goniochromatic Color Design
Authors: Clement Shimizu, Gary W. Meyer, and Joseph P. Wingard
In Eleventh Color Imaging Conference, 2003 (CIC11)

An interactive program has been developed to assist in the design of new goniochromatic colors. The program gives the user a unique set of controls over a second order polynomial that defines these color families at a sequence of aspecular reflection angles. One approach, based on traditional metallic colors, allows the user to adjust the average hue, saturation, and brightness of all of the colors interpolated by the polynomial. Another method, appropriate for the newer effect colors, permits the designer to establish face and flop colors to be reached at either end of the interpolation. In a final technique, variations produced by adjusting model parameters can be evaluated and selected.

BIBTEX CITATION
@inproceedings{shimizu0001,
author = {Clement Shimizu and Gary W. Meyer and Joseph P. Wingard},
title = {Interactive Goniochromatic Color Design},
year = {2003},
pages = {16--22},
booktitle = {Eleventh Color Imaging Conference},
}

Hardware Accelerated Motion Blur Generation

Title: Hardware Accelerated Motion Blur Generation
Authors: Clement Shimizu, Amit Shesh, and Baoquan Chen
In University of Minnesota Computer Science Department Technical Report 2003-01*

Abstract: Motion blur occurs in photography by the motion of objects during the finite exposure time that the camera shutter remains open for to record the image on film. The traditional method of rendering a motion blur with a computer is to render the scene at many discrete time instances in every frame. In this paper, we present an efficient motion blur generation method that leverages modern commodity graphics hardware. Our method avoids rendering the entire complex scene many times per frame. It first renders the scene into a texture, next renders the optic flow, created based on object transformation, to a vector field texture. The scene texture is finally efficiently blurred according to the vector field using texture mapping hardware to do a piecewise iterative line integral convolution. Though our method uses vertex velocities to calculate image pixel velocities, the line integral convolution is performed on an image, making our method largely independent of scene complexity.

*Please note that some this paper has been incorrectly cited as being published in Eurographics 2003. The authors want to be up front about this misinformation because the true publication outlet was NOT peer reviewed. Please update your research database with the correct information listed below.

BIBTEX CITATION
@InProceedings{shimizu00018xxx,
title = {Hardware-Accelerated-Motion-Blur-Generation},
author = {Clement Shimizu and Amit Shesh and Baoquan Chen},
booktitle = {University of Minnesota Computer Science Department Technical Report 2003-01},
year = {2003}
}