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2009. 7. 14. 21:23 Computer Vision
ISMAR 2008
7th IEEE/ACM International Symposium on Mixed and Augmented Reality, 2008


Proceedings
State of the Art Report

Trends in Augmented Reality Tracking, Interaction and Display
: A Review of Ten Years of ISMAR
Feng Zhou (Center for Human Factors and Ergonomics, Nanyang Technological University, Singapore)
Henry Been-Lirn Duh (Department of Electrical and Computer Engineering/Interactive and Digital Media Institute, National University of Singapore)
Mark Billinghurst (The HIT Lab NZ, University of Canterbury, New Zealand)


Tracking

1. Sensor-based tracking -> ubiquitous tracking and dynamic data fusion

2. Vision-based tracking: feature-based and model-based
1) feature-based tracking techniques:
- To find a correspondence between 2D image features and their 3D world frame coordinates.
- Then to find the camera pose from projecting the 3D coordinates of the feature into the observed 3D image coordinates and minimizing the distance to their corresponding 3D features.

2) model-based tracking techniques:
- To explicitly use a model of the features of tracked objects such as a CAD model or 2D template of the object based on the distinguishable features.
- A visual serving approach adapted from robotics to calculate camera pose from a range of model features (line, circles, cylinders and spheres)
- knowledge about the scene by predicting hidden movement of the object and reducing the effects of outlier data

3. Hybrid tracking
- closed-loop-type tracking based on computer vision techonologies
- motion prediction
- SFM (structure from motion)
- SLAM (simultaneous localization and mapping)


Interaction and User Interfaces

1. Tangible
2. Collaborative
3. Hybrid


Display

1. See-through HMDs
1) OST = optical see-through
: the user to see the real world with virtual objects superimposed on it by optical or video technologies
2) VST = video see-through
: to display graphical infromation directly on real objects or even daily surfaces in everyday life
2. Projection-based Displays
3. Handheld Displays


Limitations of AR

> tracking
1) complexity of the scene and the motion of target objects, including the degrees of freedom of individual objects and their represenation
=> correspondence analysis: Kalman filters, particle filters.
2) how to find distinguishable objects for "markers" outdoors

> interaction
ergonomics, human factors, usability, cognition, HCI (human-computer interaction)

> AR displays
- HMDs - limited FOV, image distortions,
- projector-based displays - lack mobility, self-occlusion
- handheld displays - tracking with markers to limit the work range

Trends and Future Directions

1. Tracking
1) RBPF (Rao-Blackwellized particle filters) -> automatic recognition systems
2) SLAM, ubiquitous tracking, sensor network -> free from prior knowledge
3) pervasive middleware <- information fusion algorithms

2. Interaction and User Interfaces
"Historically, human knowledge, experience and emotion are expressed and communicated in words and pictures. Given the advances in interface and data capturing technology, knowledge, experience and emotion might now be presented in the form of AR content."

3. AR Displays





Studierstube Augmented Reality Project
: software framework for the development of Augmented Reality (AR) and Virtual Reality applications
Graz University of Technology (TU Graz)

Sharedspace project
The Human Interface Technology Laboratory (HITLab) at the University ofWashington and ATR Media Integration & Communication in Kyoto,Japan join forces at SIGGRAPH 99

The Invisible Train - A Handheld Augmented Reality Game

AR Tennis
camera based tracking on mobile phones in face-to-face collaborative Augmented Reality

Emmie - Environment Management for Multi-User Information Environments

VITA: visual interaction tool for archaeology

HMD = head-mounted displays

OST = optical see-through

VST = video see-through

ELMO: an Enhanced optical see-through display using an LCD panel for Mutual Occlusion

FOV
http://en.wikipedia.org/wiki/Field_of_view_(image_processing)

HMPD = head-mounted projective displays

The Touring Machine

MARS - Mobile Augmented Reality Systems
    
Klimt - the Open Source 3D Graphics Library for Mobile Devices

AR Kanji - The Kanji Teaching application


references  
Ronald T. Azuma  http://www.cs.unc.edu/~azuma/
A Survey of Augmented Reality. Presence: Teleoperators and Virtual Environments 6, 4 (August 1997), 355 - 385. Earlier version appeared in Course Notes #9: Developing Advanced Virtual Reality Applications, ACM SIGGRAPH '95 (Los Angeles, CA, 6-11 August 1995), 20-1 to 20-38.

Ronald Azuma, Yohan Baillot, Reinhold Behringer, Steven Feiner,Simon Julier, Blair MacIntyre
Recent Advances in Augmented Reality.IEEE Computer Graphics and Applications 21, 6 (Nov/Dec 2001),34-47.

Ivan E. Sutherland
The Ultimate Display, IFIP `65, pp. 506-508, 1965

Kato, H.   Billinghurst, M.   Poupyrev, I.   Imamoto, K.   Tachibana, K.   Hiroshima City Univ.
Virtual object manipulation on a table-top AR environment

Sandor, C., Olwal, A., Bell, B., and Feiner, S. 2005.
Immersive Mixed-Reality Configuration of Hybrid User Interfaces.
In Proceedings of the 4th IEEE/ACM international Symposium on Mixed and Augmented Reality(October 05 - 08, 2005). Symposium on Mixed and Augmented Reality. IEEEComputer Society, Washington, DC, 110-113. DOI=http://dx.doi.org/10.1109/ISMAR.2005.37

An optical see-through display for mutual occlusion with a real-time stereovision system
Kiyoshi Kiyokawa, Yoshinori Kurata and Hiroyuki Ohno
Computers & Graphics Volume 25, Issue 5, October 2001, Pages 765-779

Bimber, O., Fröhlich, B., Schmalstieg, D., and Encarnação, L. M. 2005.
The virtual showcase. In ACM SIGGRAPH 2005 Courses (Los Angeles, California, July 31 - August 04, 2005). J. Fujii, Ed. SIGGRAPH '05. ACM, New York, NY, 3. DOI= http://doi.acm.org/10.1145/1198555.1198713

Bimber, O., Wetzstein, G., Emmerling, A., and Nitschke, C. 2005.
Enabling View-Dependent Stereoscopic Projection in Real Environments. In Proceedings of the 4th IEEE/ACM international Symposium on Mixed and Augmented Reality (October 05 - 08, 2005). Symposium on Mixed and Augmented Reality. IEEE Computer Society, Washington, DC, 14-23. DOI= http://dx.doi.org/10.1109/ISMAR.2005.27

Cotting, D., Naef, M., Gross, M., and Fuchs, H. 2004.
Embedding Imperceptible Patterns into Projected Images for Simultaneous Acquisition and Display. In Proceedings of the 3rd IEEE/ACM international Symposium on Mixed and Augmented Reality (November 02 - 05, 2004). Symposium on Mixed and Augmented Reality. IEEE Computer Society, Washington, DC, 100-109. DOI= http://dx.doi.org/10.1109/ISMAR.2004.30

Ehnes, J., Hirota, K., and Hirose, M. 2004.
Projected Augmentation - Augmented Reality using Rotatable Video Projectors. In Proceedings of the 3rd IEEE/ACM international Symposium on Mixed and Augmented Reality (November 02 - 05, 2004). Symposium on Mixed and Augmented Reality. IEEE Computer Society, Washington, DC, 26-35. DOI= http://dx.doi.org/10.1109/ISMAR.2004.47

Arango, M., Bahler, L., Bates, P., Cochinwala, M., Cohrs, D., Fish, R., Gopal, G., Griffeth, N., Herman, G. E., Hickey, T., Lee, K. C., Leland, W. E., Lowery, C., Mak, V., Patterson, J., Ruston, L., Segal, M., Sekar, R. C., Vecchi, M. P., Weinrib, A., and Wuu, S. 1993.
The Touring Machine system. Commun. ACM 36, 1 (Jan. 1993), 69-77. DOI= http://doi.acm.org/10.1145/151233.151239

Gupta, S. and Jaynes, C. 2006.
The universal media book: tracking and augmenting moving surfaces with projected information. In Proceedings of the 2006 Fifth IEEE and ACM international Symposium on Mixed and Augmented Reality (Ismar'06) - Volume 00 (October 22 - 25, 2006). Symposium on Mixed and Augmented Reality. IEEE Computer Society, Washington, DC, 177-180. DOI= http://dx.doi.org/10.1109/ISMAR.2006.297811


Klein, G. and Murray, D. 2007.
Parallel Tracking and Mapping for Small AR Workspaces. In Proceedings of the 2007 6th IEEE and ACM international Symposium on Mixed and Augmented Reality - Volume 00 (November 13 - 16, 2007). Symposium on Mixed and Augmented Reality. IEEE Computer Society, Washington, DC, 1-10. DOI= http://dx.doi.org/10.1109/ISMAR.2007.4538852

Neubert, J., Pretlove, J., and Drummond, T. 2007.
Semi-Autonomous Generation of Appearance-based Edge Models from Image Sequences. In Proceedings of the 2007 6th IEEE and ACM international Symposium on Mixed and Augmented Reality - Volume 00 (November 13 - 16, 2007). Symposium on Mixed and Augmented Reality. IEEE Computer Society, Washington, DC, 1-9. DOI= http://dx.doi.org/10.1109/ISMAR.2007.4538830

posted by maetel
2009. 2. 14. 17:27 Computer Vision
IEEE Transactions on Robotics, Volume 24, Number 5, October 2008
: Visual SLAM Special Issue

Guest Editorial: Special Issue on Visual SLAM


simultaneous localization mapping (SLAM)
in autonomous mobile robotics
using laser range-finder sensors
to build 2-D maps of planar environments

SLAM with standard cameras:
feature detection
data association
large-scale state estimation

SICK laser scanner


Kalman filter
Particle filter
submapping

http://en.wikipedia.org/wiki/Particle_filter
particle filter = sequential Monte Carlo methods (SMC)


http://en.wikipedia.org/wiki/Image_registration
the process of transforming the different sets of data into one coordinate system


http://en.wikipedia.org/wiki/Simultaneous_localization_and_mapping
the process of creating geometrically accurate maps of the environment
to build up a map within an unknown environment while at the same time keeping track of their current position

R.C. Smith and P. Cheeseman (1986)

Hugh F. Durrant-Whyte (early 1990s)

Sebastian Thrun

mobile robotics
autonomous vehicle

한국로봇산업협  http://www.korearobot.or.kr/




posted by maetel
2008. 6. 7. 22:19 Computation/Cocoa
http://www.informit.com/store/product.aspx?isbn=0321503619

3rd edition:
http://proquest.safaribooksonline.com/9780321562739
-> reading online

2nd edition:
http://catdir.loc.gov/catdir/toc/ecip0414/2004003054.html


google book:
http://books.google.com/books?id=47IMAAAACAAJ

COCOA Programming for Mac OS X 2/E 상세보기
Hillegass 지음 | Addison Wesley 펴냄
Provides step-by-step instructions for learning COCOA, discussing such topics as Objective-C, controls, helper objects, archiving, Nib files and NSWindowController, and creating interface builder palettes.


Aaron Hillegass
http://www.bignerdranch.com/

ref.
Learn Objective-C on the Macintosh
By Mark Dalrymple and Scott Knaster
invalid-file

preview pdf


Cocoa Fundamentals Guide: What Is Cocoa?

Cocoa Application Tutorial: Introduction to Cocoa Application Tutorial

Cocoa Guides

http://en.wikipedia.org/wiki/Cocoa_%28API%29





Chapter 1
Cocoa: What Is It?

1p
A Little History


NeXTSTEP
http://en.wikipedia.org/wiki/NEXTSTEP


darwin
http://en.wikipedia.org/wiki/Darwin_(operating_system)
http://www.opendarwin.info/
http://developer.apple.com/opensource/index.html

X window server
http://en.wikipedia.org/wiki/X_Window_System


NeXTSTEP came with a set of libraries and tools to enable programmers to deal with the window manager in an elegant manner. The libraries were called frameworks. In 1993, the frameworks and tools were revised and renamed OpenStep, which was itself later renamed Cocoa.

사용자 삽입 이미지

Cocoa enables your application to receive events from the window server and draw to the screen.

Programming with the frameworks is done in a language called Objective-C.


4p
Tools

Mac OS X Developer Tools (Xcode, Interface Builder)
GNU C compiler (gcc)
GNU debugger (gdb)


Language

Objective-C
Java - portability

Swing - an API for providing a graphical user interface (GUI) for Java programs.
http://en.wikipedia.org/wiki/Swing_%28Java%29


5p
Objects, Classes, Methods, and Messages

An object takes up memory and has variables inside it.

Classes are structures that can create objects. Classes specify the variables that the object has, and they are responsible for allocating memory for the object. We say that the object is an instance of the class that created it.
To call a method, you send the object a message.


6p
Frameworks

A framework is a collection of classes that are intended to be used together. The classes are compiled together into a reusable library of code. Any related resources are put into a directory with the library. The directory is renamed with the extensioin .framework. You can find the built-in frameworks for your machine in /System/Library/Frameworks.

All Cocoa applications use two of these frameworks: Foundation and AppKit.


7p

posted by maetel
2008. 2. 17. 00:41 Context
인터넷 아트(시공 아트50) 상세보기
레이철 그린 지음 | 시공아트 펴냄
20세기 후반 인터넷의 등장으로 생겨난 '인터넷 아트'! 예술교양서 시리즈「시공아트」50번째 이야기.『인터넷 아트: 사이버 시대의 예술』은 20세기 후반에 현대 대중들의 네트워크 커뮤니케이션 공간인 웹에서 등장한 인터넷 아트(넷 아트)에 관해 이야기한다. 인터넷 아트를 사이버 시대의 생활 방식과 관련해 고찰하고, 인터넷 아트와 기존 미술의 관계에 대해 논의하였다. 인터넷 아트는 원격 컴퓨터로 예술 공간을 확장

ddsf

informed by 윤타 선생님

원서
Internet Art

Internet Art

by Rachel Greene - Art - 2004 - 224 pages
The book investigates the ways Internet art resists and shifts assumptions about
authorship, originality, arid intellectual property; the social role of the...

posted by maetel
2006. 5. 15. 22:44 Footmarks/INP3
2006-05-15 @아트센터나비

최수환
CHOE, Sou-Hwan

서울대 재료공학
홍대 앞 클럽 Drug에서 밴드 Yellow Kitchen 활동
한예종 전자음악
LG (벨소리)



History of Machine Music
From Telharmonium to SuperCollider (sound engineering)

1) Brief History of Electronic Music
2) Music Language & System
3) Demonstration


Episode I: Brief History of Electronic Music

1. Early Pioneers
2. Musique Concrete
3. Elektronische Musik
4. Around the World
5. Renaissance of Electronic Music


1. Early Pioneers

1) Telharmonium 1896
    Electro-mechanic 최초의 전자악기 (특허등록)
2) Theramin 1924
    이후의 키보드 형태의 전자악기와는 달리 악기로서의 지위가 낮다.
    세로 안테나 - pitch / 가로 안테나 - volume
3) The Ondes Martenot, Maurice Martenot
4) The Trautonium, Friedrich Trautwein
5) Hammond Organ, Laurens Hammond


2. Musique Concrete
세계대전 전후, 소리의 암호화를 위해 발달.
subtractive에 해당.

1) Magnetic Tape Recorder
    녹음 가능. => 어디서나 다시 들을 수 있다.
2) Radiodiffusion-Télévision Française (RTF)
    Art of Noise 논문 (미래주의)
3) Pierre Schaeffer
    프랑스 라디오 엔지니어가 창시하여 주도.
    '기차가 달리는 소리'를 녹음하여 편집 작업.
    요즘의 sampling, mixing의 시초라 볼 수 있음.
4) Studio d'E
5) "Etude sus ... de fer"

1- Tape Splicing 테잎 자르기
2- Degeneration of a Recorded Signal -> 녹음 위에 또 녹음
3- Tape Echoe, Delay, and Looping
4- Tape Reversal


3. Elektronische Musik
additive 방식에 해당.

West German Radio (WDR) in Cologne
    Serialism의 영향을 받아 탄생.
       * Electronic Serial Music (Die Reihe, vol. I, 1955)
          : 정교한 수치에 근거한 그래픽/그림 악보
    이후, moduler 타입의 synthesizer로 이어짐.
       eg. Moog Synthesizer


4. Around the World
Milan, Italy
Bell Telephone
New York
Tokyo, Japan
Netherland

* Karlheinz Stockhausen    스톡하우젠
    - Unified Time Structuring
    - Splitting of the Sound
    - Multi-Layered Spatial Composition
    - Equality of Tone and Noise

* John Cage
    <Imaginary Landscape No. 1>
    - Assembly of Musical Material
    - Chance Music
    - Silence

* Iannis Xenakis
    - Mathematics and Music 조합
    - Computer Assisted Composition
    - Formulated Music
    eg. recorded with GENDYN program


5. Renaissance of Electronic Music
    Raymond Scott -> 광고, 만화 영화의 효과 음악
    Wendy Carlos
    Robert Moog



Episode II: Music Language & System

1. Music-N
    모든 컴퓨터 음악 언어의 시초 = C sound
2. Embedded in LISP
3. Max/MSP, Jitter, PD
4. Super Collider


1. Music-N
1950년대 Max Mattews (Max/MSP)가 개발
sine generation을 최초로 소프트웨어적으로 구현
sin Osc -> C Sound: C로 되어 있음

* Max Mattews
1957, Music I (Assembly, IBM 704)
1962, Music IV (Assembly, IBM 7094) - 벨 연구소
1968, - 벨 연구소
1973, Music II - 벨 연구소
1985, CMusic
1986, CSound (Music II, C), B. Vercoe -MIT

Music-N Cores:
1) "Orchestra-Score" Structure: 악기와 악보가 따로 정의됨
2) Unit Generator

CSound Extensions: Dist I/O, GUI, MIDI Manager
초창기 CSound에서 real time이 어려웠기 때문에 이후 사양길에 듦.


2. LISP
Stanford univ.에서 만든 Common Music List 형식의 언어로 되어 있어 이것이 software language의 특성과 잘 맞아 떨어졌다.

LISP = List Processing Language
: Development for Research in AI
: Programs as Dats (?)
음악적 구조를 잘 드러낼 수 있는 언어.
악보를 만들 수는 있으나 실제 소리 재생에는 어려움이 있었음.

eg1) Common Music (Taube, CCRMA, Stanford Univ.)
eg2) Patchwork -> Open Music (IRCAM) - GUI
eg3) Symbolic Composer (Tonal Systems)
    LISP 계열 언어를 써야 하므로 database가 잘되어 있음에도 음악가가 쓰기 어려움.
eg4) Canon (Dannenberg)
    역시 LISP 기반


3. Max/MSP, Jitter, PD

Max/MSP - 프랑스 IRCAM에서 개발. real time interaction. 작곡/연주 가능

1986, Patcher, M. Puckette
1990, Max/Opcode, D. Zicarelli
1996, PureData, M. Puckette (:open source. GUI는 Max보다 조금 떨어짐.)
1997, MSP Package, D. Zicarelli
1998, jMax, IRCAM
2001, Jitter Package, Cycling 74


4. SuperCollider

www.audiosynth.com/

Generation 1: Synth-O-matic + Pyrite
Generation 2: Unified System (Synth Engine + Language)
Generation 3: "Server-Client" (:real time level에서 용이)

Server <- OSC -> Client
    Server - Synth Engine (신서를 만듦)
    Client - Language Interpreter
    OSC - Open Sound Control이라는 protocol로 통신 (CN MAT, Bukley Univ. 개발) - Max, Flash, Java, Reactor와 연동 가능

> 특징
- Language (Client)
    C
    Scheme LISP
    Functional
    Smalltalk Syntax
    Dynamic Scope
    Realtime Garbage Collection
    List Comprehension

- Synth Engine (Server)
    Open Sound Control Access
    ANSI C plugin API
    Dynamic Bus System

- Output
    AIF, WAV 등

- Import
    midi controller
    OSC를 지원하는 device와 연동 가능
    serial, USB와 연결 가능

cp. Princeton, Chuck
       on the fly


posted by maetel