• 제목/요약/키워드: hardware rendering

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Volume Rendering Using Multi-Textures (Multi-Textures를 이용한 Volume Rendering)

  • 박재영;이병일;최흥국
    • Proceedings of the Korea Institute of Convergence Signal Processing
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    • 2000.12a
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    • pp.169-172
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    • 2000
  • Direct volume rendering has yet been restricted to high-end graphic workstations and special-purpose hardware, due to the large amount of trilinear interpolation, that are necessary to obtain high image quality. In this paper, we implemented the volume rendering techniques using the 2D-texture at the environment of standard PC hardware. In addition, we show how multi-texturing capabilities of modern PC graphics board are enable to volume rendering. Besides using extended OpenGL function, we improved pixel operations and rendering capacity.

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Exploiting Programmable Shaders in Hardware-Assisted Volume Rendering (PC용 그래픽스 가속기의 쉐이더 기능을 이용한 볼륨 렌더링)

  • Im, In-Seong;Gang, Byeong-Gwon
    • Journal of the Korea Computer Graphics Society
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    • v.8 no.2
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    • pp.23-29
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    • 2002
  • In this paper, we describe an implementation technique that extends the classification and shading capabilities offered by previously reported hardware-assisted volume rendering algorithms. In designing our rendering scheme, we exploited the programmable shader technology supported by the latest consumer PC graphics hardware. Our direct volume rendering technique enables to simultaneously display up to four materials, and to dynamically control gradient magnitude to emphasize or de-emphasize surface boundaries. It can easily create lighting effects such as light source attenuation, depth cueing, and multiple light sources that were often difficult to realize in previous hardware-assisted volume rendering.

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Accelerating Depth Image-Based Rendering Using GPU (GPU를 이용한 깊이 영상기반 렌더링의 가속)

  • Lee, Man-Hee;Park, In-Kyu
    • Journal of KIISE:Computer Systems and Theory
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    • v.33 no.11
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    • pp.853-858
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    • 2006
  • In this paper, we propose a practical method for hardware-accelerated rendering of the depth image-based representation(DIBR) of 3D graphic object using graphic processing unit(GPU). The proposed method overcomes the drawbacks of the conventional rendering, i.e. it is slow since it is hardly assisted by graphics hardware and surface lighting is static. Utilizing the new features of modem GPU and programmable shader support, we develop an efficient hardware-accelerating rendering algorithm of depth image-based 3D object. Surface rendering in response of varying illumination is performed inside the vertex shader while adaptive point splatting is performed inside the fragment shader. Experimental results show that the rendering speed increases considerably compared with the software-based rendering and the conventional OpenGL-based rendering method.

A Simplified Graphics System Based on Direct Rendering Manager System

  • Baek, Nakhoon
    • Journal of information and communication convergence engineering
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    • v.16 no.2
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    • pp.125-129
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    • 2018
  • In the field of computer graphics, rendering speed is one of the most important factors. Contemporary rendering is performed using 3D graphics systems with windowing system support. Since typical graphics systems, including OpenGL and the DirectX library, focus on the variety of graphics rendering features, the rendering process itself consists of many complicated operations. In contrast, early computer systems used direct manipulation of computer graphics hardware, and achieved simple and efficient graphics handling operations. We suggest an alternative method of accelerated 2D and 3D graphics output, based on directly accessing modern GPU hardware using the direct rendering manager (DRM) system. On the basis of this DRM support, we exchange the graphics instructions and graphics data directly, and achieve better performance than full 3D graphics systems. We present a prototype system for providing a set of simple 2D and 3D graphics primitives. Experimental results and their screen shots are included.

Intermixing Surface and Volume Visualization Using Layered Depth Images (다중 깊이 영상을 이용한 볼륨-표면 혼합 가시화)

  • Kye, Heewon
    • Journal of Korea Game Society
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    • v.13 no.2
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    • pp.99-110
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    • 2013
  • As volume rendering has been applied for computer game, the visualization of volume data with surface data in one scene has been required. Though a hybrid rendering of volume and surface data have been developed using the GPGPU functionality, computer games which run on low-level hardware are difficult to perform the hybrid rendering. In this paper, we propose a new hybrid rendering based on DirectX 9.0 and general hardware. We generate the layered depth images from surface data using a new method to reduce the depth complexity and generation time. Then, we perform the hybrid rendering using the layered depth images. In the rendering process, we suggest a new method to transform the coordinate system from a surface coordinate to a volume coorinate and propose an accelerated rendering technique. As the result, we can perform volume-surface hybrid rendering in an efficient way.

Rendering of Sweep Surfaces using Programmable Graphics Hardware (그래픽스 하드웨어를 이용한 스윕 곡면의 렌더링)

  • Ko, Dae-Hyun;Yoon, Seung-Hyun;Lee, Ji-Eun
    • Journal of the Korea Computer Graphics Society
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    • v.16 no.4
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    • pp.11-16
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    • 2010
  • We present an efficient algorithm for rendering sweep surfaces using programmable graphics hardware. A sweep surface can be represented by a cross-section curve undergoing a spline motion. This representation has a simple matrix-vector multiplication structure that can easily be adapted to programmable graphics hardware. The data for the motion and cross-section curves are stored in texture memory. The vertex processor considers a pair of surface parameters as a vertex and evaluates its coordinates and normal vector with a single matrix multiplication. Using the GPU in this way is between 10 and 40 times as fast as CPU-based rendering.

High-Quality Global Illumination Production Using Programmable Graphics Hardware (프로그래밍 가능한 그래픽스 하드웨어를 사용한 고품질 전역 조영 생성)

  • Cha, Deuk-Hyun;Chang, Byung-Joon;Ihm, In-Sung
    • 한국HCI학회:학술대회논문집
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    • 2008.02a
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    • pp.414-419
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    • 2008
  • 3D rendering is a critical process for a movie production, advertisement, interior simulation, medical and many other fields. Recently, several effective rendering methods have been developed for the photo-realistic image generation. With a rapid performance enhancement of graphics hardware, physically based 3D rendering algorithm can now often be approximated in real-time games. However, the high quality of global illumination, required for the image generation in the 3D animation production community is a still very expensive process. In this paper, we propose a new rendering method to create photo-realistic global illumination effect efficiently by harnessing the high power of the recent GPUs. Final gathering routines in our global illumination module are accelerated by programmable graphics hardware. We also simulate physically based light transport on a ray tracing based rendering algorithm with photon mapping effectively.

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Cache simulation for measuring cache performance suitable for sound rendering (사운드 렌더링에 적합한 캐시 성능 측정을 위한 캐시 시뮬레이션)

  • Joo, Yejong;Hong, Dukki;Chung, Woonam;Park, Woo-Chan
    • Journal of the Korea Computer Graphics Society
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    • v.23 no.3
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    • pp.123-133
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    • 2017
  • Cache performance is an important factor in hardware system. We proceed with a cache simulation to analyze the cache performance suitable for sound rendering. In addition, we introduce hardware models based on ray tracing used in geometric method and studies to improve cache performance. Cache simulation is performed on various conditions for cache size, way and block. Various simulations can be found to influence the cache hit rate. We compare cache simulation results with actual hardware performance to analyze cache performance suitable for sound rendering.

FPGA-based Hardware Prediction Rendering for Low-Latency Touch Platform

  • Song, Seok Bin;Kim, Jin Heon
    • Journal of Multimedia Information System
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    • v.5 no.1
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    • pp.59-62
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    • 2018
  • The delay between input action and visual interface feedback ("Latency") in a touchscreen inking task reduces the user's performance. When the latency is less than 2.38ms, the user cannot perceive the latency in dragging task. This value is difficult to achieve on recent touchscreens and general purpose computers. So, methods of predicting touch points to reduce perceptible latency has been proposed. In general, touch points prediction is not perfect. When using point prediction, feedback of the predicted points is displayed on the screen, after a while, erased when the actual points are displayed. When this task is implemented by software, it causes additional latency to work to erase predicted points feedback. It therefore propose a platform for rendering point prediction feedback without additional latency by the FPGA. This platform transmits input points and HDMI signals rendering feedback of input points to the FPGA. The FPGA draws the feedback of points predicted based on the input points on the HDMI and displays the screen. Since hardware rendering changes the HDMI signal every frame, it does not require erasing work and rendering can be done within an early time regardless of the amount of rendering, so we will reduce the latency.

Hardware-Accelerated Multipipe Parallel Rendering of Large Data Streams

  • Park, Sanghun;Park, Sangmin;Bajaj, Chandrajit;Ihm, Insung
    • Journal of the Korea Computer Graphics Society
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    • v.7 no.2
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    • pp.21-28
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    • 2001
  • As a result of the recent explosive growth of scientific data, extremely large volume datasets have become increasingly commonplace. While several texture-based volume rendering algorithms have been proposed, most of them focused on volumes smaller than the hardware's available texture memory. This paper presents a new parallel volume rendering scheme for very large static and time-varying data on a multipipe system architecture. Our scheme subdivides large volumes dynamically into smaller bricks, and assigns them adaptively to graphics pipes to minimize the costs of texture swapping. With the new method, Phong shaded images can be easily created by computing the gradients on the fly and using the color matrix feature of OpenGL. We report experimental results on an SGI Onyx2 for the various large datasets.

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