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Published byJohnathan Quinn Modified over 9 years ago
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Overview of Computer Graphics Subjects : What is C.G History of C.G Applications of C.G C.G vs I.P Course objectives
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What is CG (1/2) Humans Communicate well with images 1/3 of our brain is devoted to visual processing A picture is worth a thousand words WYSIWYG paradigm In the past, graphics was only used to convert numerical data sets to graphs. business graphs (bar chart, pie chart)
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What is CG (2/2) Nowadays, graphics is used to depict the complex data sets and virtual / natural phenomena. Virtual Reality(VR), Scientific Visualization(SV) Definition : Picture style I/O technology involving the Creation manipulation storing and display of pictures with the aid of computer Numerical data Picture (Image) data inputoutput
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HISTORY OF C.G (1/2) General Trends 1950’s : First military application of graphics Mid 1950 : SAGE (Semi-Automatic Ground Environment) Air Defense System first “command and control” CRT with lightpen 1963 : Ivan Sutherland’s sketchpad thesis called father of C.G propose interactive graphics system 1966 : Wall street Journal was writing about C.G and CAD
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HISTORY OF C.G (2/2) Mid 1970’s : Emergence of raster graphics display based on T.V technology development of raster graphics hereafter 1981 : Apollo introduces first graphics workstation 1984 : Evolution of GUI by Apple Macintoshi Mid 1980’s : Commercial usage of V.R techniques Early 1990’s : Scientific Visualization and Volume graphics
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Applications of C.G (1/2) CAD (Computer-Aided Design) for Engineering and Architectural design design of buildings, automobiles, spacecraft, and VLSI Presentation Graphics for illustration of outputs. bar chart, line graph, pie chart etc. Computer Art for fine art and commercial art applications.
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Applications of C.G (2/2) Entertainment for special effects of CF, movies Jurassic Park, Terminator II Education and Training Graphics supported flight simulator CD Rom title Visualization called Scientific Visualization converting millions of data value into pictures VR Game S/W, etc by using CGI (Computer Generated Imagery)
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Computer Graphics vs Image Processing (1/2) Computer Graphics(C.G) a computer is used to create a picture. model based approach concerns pictorial synthesis of real or imagery objects from computer based model deals with vector data ex) Jurrassic park, Game
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Computer Graphics vs Image Processing (2/2) Image Processing (I.P) a computer is used to modify or interpret existing pictures. processing of sensor based data concerns scene analysis. improving picture quality machine perception of visual info deals with pixel data ex) Recognition of car license plate Interpretation of satellite image
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Course objectives : (1/2) generation of photo-realistic Images Two different views in studying CG A graphics system user’s view (Computer Graphic) interested in what images are produced by using graphics S/W industrial design, visual art A system programmer’s view (Computer Graphics) how to write a physics-based application program (package) for users. interested in the development of fast and accurate graphics software
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Course objectives : (2/2) Related fundamental subjects of C.G are Computer Science mathematics physics mechanical engineering etc. C.G S/W consist of Modeling S/W Rendering S/W Animation S/W Image Composition S/Wfor Image Synthesis +
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모 델 링 (Modelling) 대상물체의 형상화를 위해 사용되는 기술 인공물체 : 기하학적 Primitive ( 선, 면, 구, 육면체 ) 등을 이용하여 형상화 입력물 : 형상화 물체의 3 차원 좌표값 출력물 : 선구조형상 (Wire framed objects) 기 법 : Interpolation / Approximation, CGS, Sweeping, Deformation 등 자연물체 : Procedualism 에 의한 형상화 입력물 : 자연물의 구조를 정의하는 규칙 출력물 : 선구조 형상 기 법 : 프랙탈 기법, Grammar-based modelling, particle system, physically based modelling 등
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애니메이션 (Animation) Animation is giving variations on the model over time Different keys given by the animator are interpolated to give in betweens. 2D Animation (Cell Animation) 3D Animation 기 법 : Key-frame Animation Kinematics / Inverse Kinematics Dynamics Metamorphosis
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렌 더 링 (Rendering) Process of photo-like image generation Rendering adds light to the model The renderer tracks the light in the scene to determine how the scene looks to the viewer. 기 법 : Hidden elements Removal Shading Texture mapping Ray-tracing Radiosity
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영 상 합 성 (Image Synthesis) 실사와 C.G 기술의 자연스러운 조화기술 예 ) Jumanjii, photoshop S/W 기술내용 : Image processing 기술 Film 의 Digital 변형기술 Digital 합성기술 Color Composition / Correction 기술
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