• Title/Summary/Keyword: interactive rendering

Search Result 100, Processing Time 0.043 seconds

A Study on improved AR-based education system for effective transporter operation (트랜스포터의 효과적인 운용을 위한 개선된 형태의 증강현실기반 교육 시스템에 관한 연구)

  • Lee, Jung-Min;Lee, Kyung-Ho
    • Korean Journal of Computational Design and Engineering
    • /
    • v.16 no.6
    • /
    • pp.407-413
    • /
    • 2011
  • Augmented reality technology can provide computer-generated information to user effectively, therefore many industries have been trying to adopt AR technology to own domain field. Shipbuilding and offshore industry are also trying to introduce the technology, especially in education field. We have already studied about transporter education system based on augmented reality to help understanding for non-expert engineers. Once our previous study was focused on improving of rendering quality, this paper focuses on effective interaction between engineers and system to more increase educational results.

Realtime Fluid Simulation and Rendering Using Billboard method on Mobile Environment (모바일 환경에서의 빌보드 기법을 통한 실시간 유체 시뮬레이션 렌더링)

  • Woo, Sang-Hyuk;Cho, Mirina;Park, Dong-Gyu
    • Proceedings of the Korea Contents Association Conference
    • /
    • 2006.11a
    • /
    • pp.264-268
    • /
    • 2006
  • This paper presents a fire and smoke animation system using stable fluid animation techniques. Stable and fast fluid simulation methods are developed in PC and console games, but fluid simulation and interactive fluid models still have many problems. We studied and implemented physics-based models for fluids like fire and smoke effects using mobile 3D system. The mobile platform of our system is WIPI, which are the standard mobile platform in Korea also we adopted NF3D API for our 3D programming API.

  • PDF

Visualization of Internal Electric Field on Plasma (플라즈마 내부 전기장 가시화)

  • Shin, Han Sol;Yu, Tae Jun;Lee, Kun
    • Journal of Korea Multimedia Society
    • /
    • v.19 no.1
    • /
    • pp.80-85
    • /
    • 2016
  • It costs high in both memory usage and time consuming to sample the space to compute charge density and calculate electric field on that with large size of plasma data. In real-time and interactive application, accelerating the compute time is critical problem. In this paper, we suggest new method to visualize electric field by using convolution theorem, and the parallel computing to accelerate computing time by using GPGPU. We conduct a simulation that compare running time between the methods with convolution and without convolution. We discussed the method of visualization of multivariate data in three dimensional space using colored volume rendering and surface construction.

Interactive Haptic Deformation and Material Property Modeling Algorithm (인터랙티브 햅틱 변형 및 재질감 모델링 알고리즘)

  • Lee, Beom-Chan;Kim, Jong-Phil;Park, Hye-Shin;Ryu, Je-Ha
    • 한국HCI학회:학술대회논문집
    • /
    • 2007.02a
    • /
    • pp.1-7
    • /
    • 2007
  • 본 논문은 3차원 스캐너로 획득된 실제 얼굴 데이터를 햅틱 상호작용을 통해 직접 변형하고 재질감을 모델링 하는 알고리즘을 제안한다. 제안된 알고리즘은 그래픽 하드웨어 기반의 햅틱 렌더링 알고리즘을 기반으로 획득된 2.5D 얼굴 데이터를 mass-spring 모델을 적용하여 변형하고 얼굴의 재질감(탄성, 마찰, 거칠기) 정보를 모델링 하는 것이다. 햅틱 장치를 이용한 변형알고리즘은 변형 시 효율적인 변형 영역 탐색을 위하여 공간 분할방법인 k-d 트리 구조를 이용하여 최근방 탐색 알고리즘을 구현하였으며, 사실적인 힘 계산을 위하여 각 포인트 마다 mass-spring 모델을 적용하여 반력 연산 및 물체의 변형을 수행하였다. 아울러 재질감을 모델링 하기 위해 깊이 이미지 기반 표현(Depth Image Based Representation, DIBR)을 이용하여 가상 물체의 거칠기, 탄성, 및 마찰을 편집할 수 있는 방법론을 제시하고, 편집된 재질감을 직접 물체의 표면에 적용하여 렌더링 하는 알고리즘을 제안한다.

  • PDF

A Study on the Data Input and Visualization of Sturctual Form on Topographic Relief in the Landscape Simulation Thchnique using CG (컴퓨터 그래픽스를 이용한 경관 시뮬레이션에 있어서 지형상에 구조물 형상 입력과 가시화 방법에 관한 연구)

  • 조동범
    • Journal of the Korean Institute of Landscape Architecture
    • /
    • v.24 no.3
    • /
    • pp.29-41
    • /
    • 1996
  • The purposes of this study were to develope some techniques which can be used in the landscape simulation process using PC based computer grahics. As a result, a couple of utilities were programmed in AutoLISP language. The one(DSLINE.LSP) is to digitize 2-dimensional structuer forms in the interactive mode considering error handling, and the other one (IMPOST.LSP) is for superimposing and visualizing the digitized plan data to 3-dimension solids & surfaces referring to topographic elevations of meshes in digital terrain model. By applying utilities to present site, the followings may be described. 1) The utility DSLINE.LSP for digitizing simplified building structure form were proved to be easy to input data of polygons including orthogonal edges by handling user coordinates system and checking invalid intersection and default colsing. 2) IMPOST.LSP utility for superimposing and visualizing tool were proved to be more complicated and speedy in calculating process compared with a practical application of modeling tool before rendering process in landscape simulation of built environment on topographic relief, on specially mesospace level of assessment.

  • PDF

Virtual Endoscopic S/W System using the SSD Method (SSD기반의 가상내시경 S/W시스템)

  • Song, Cheol-Gyu;Kim, Nam-Gyun;Lee, Myeong-Ho
    • Proceedings of the KIEE Conference
    • /
    • 2000.07d
    • /
    • pp.3245-3247
    • /
    • 2000
  • We present an interactive virtual bronchoscopy method, which uses a tree structure of the objects and physically based camera control model. The proposed method archieves faster response by rendering only visible branches using the tree structure of the bronchus. A collision detection algorithm supplies a convenient and intuitive mechanism for examining the bronchus inner surface while a voiding collisions. We have improved the performances of navigation speed in virtual bronchoscopy.

  • PDF

Research and development of haptic simulator for Dental education using Virtual reality and User motion

  • Lee, Sang-Hyun
    • International journal of advanced smart convergence
    • /
    • v.7 no.4
    • /
    • pp.114-120
    • /
    • 2018
  • The purpose of this paper is to develop simulations that can be used for virtual education in dentistry. This development goal is to allow dental students to learn the necessary surgical techniques at the point of their choice, not going into the operating room, away from time, space, and physical limits. In this paper configuration, the optimization method is applied convergent, and when the operation of the VR contents is performed, the content data is extracted from the interaction analysis formed in the VR engine, and the data is processed by the content algorithm. It also computes events and dental operations generated within the 3D engine programming and generates corresponding events through data processing according to the input signal. The visualization information is output to the HMD using the rendering information. In addition, the operating room environment was constructed by studying lighting and material for actual operating room environment. We applied the ratio of actual space to virtual space and the ratio between character and actual person to create a spatial composition at a similar rate to actual space.

Application Analysis of Artificial Intelligence Technology in Museum Concept Design

  • Chen Xi;Jeanhun Chung
    • International journal of advanced smart convergence
    • /
    • v.12 no.4
    • /
    • pp.321-327
    • /
    • 2023
  • The current rapid development of artificial intelligence technology has involved all aspects of the production field. The development of various algorithms and programs has pushed artificial intelligence to a new peak. Due to its complexity and diversity in the field of architectural design, the positive impact of artificial intelligence technology on architectural design is discussed from the perspective of conceptual design. For museums, which are one of the increasingly popular public facilities, the introduction of artificial intelligence technology has provided certain help in assisting the conceptual design of the museum. This article analyzes the theoretical and practical support of artificial intelligence technology in improving conceptual design, analyzing the architectural appearance, structural layout, materials, etc., to increase the feasibility and practicality of assisting conceptual design. It has certain reference significance for building a modern, advanced, international and interactive modern museum.

Color2Gray using Conventional Approaches in Black-and-White Photography (전통적 사진 기법에 기반한 컬러 영상의 흑백 변환)

  • Jang, Hyuk-Su;Choi, Min-Gyu
    • Journal of the Korea Computer Graphics Society
    • /
    • v.14 no.3
    • /
    • pp.1-9
    • /
    • 2008
  • This paper presents a novel optimization-based saliency-preserving method for converting color images to grayscale in a manner consistent with conventional approaches of black-and-white photographers. In black-and-white photography, a colored filter called a contrast filter has been commonly employed on a camera to lighten or darken selected colors. In addition, local exposure controls such as dodging and burning techniques are typically employed in the darkroom process to change the exposure of local areas within the print without affecting the overall exposure. Our method seeks a digital version of a conventional contrast filter to preserve visually-important image features. Furthermore, conventional burning and dodging techniques are addressed, together with image similarity weights, to give edge-aware local exposure control over the image space. Our method can be efficiently optimized on GPU. According to the experiments, CUDA implementation enables 1 megapixel color images to be converted to grayscale at interactive frames rates.

  • PDF

Fast Light Source Estimation Technique for Effective Synthesis of Mixed Reality Scene (효과적인 혼합현실 장면 생성을 위한 고속의 광원 추정 기법)

  • Shin, Seungmi;Seo, Woong;Ihm, Insung
    • Journal of the Korea Computer Graphics Society
    • /
    • v.22 no.3
    • /
    • pp.89-99
    • /
    • 2016
  • One of the fundamental elements in developing mixed reality applications is to effectively analyze and apply the environmental lighting information to image synthesis. In particular, interactive applications require to process dynamically varying lighting sources in real-time, reflecting them properly in rendering results. Previous related works are not often appropriate for this because they are usually designed to synthesize photorealistic images, generating too many, often exponentially increasing, light sources or having too heavy a computational complexity. In this paper, we present a fast light source estimation technique that aims to search for primary light sources on the fly from a sequence of video images taken by a camera equipped with a fisheye lens. In contrast to previous methods, our technique can adust the number of found light sources approximately to the size that a user specifies. Thus, it can be effectively used in Phong-illumination-model-based direct illumination or soft shadow generation through light sampling over area lights.