Graphics

About: Graphics is a research topic. Over the lifetime, 17394 publications have been published within this topic receiving 411468 citations. The topic is also known as: graphic.

Future multimedia user interfaces

Abstract: No matter how powerful or elegant the technologies underlying multimedia computing, it is the user interface that ultimately determines how these systems will be used. We provide an overview of two emerging areas of user-interface research that will play major roles in future multimedia systems: virtual environments and ubiquitous computing. We discuss what they are and why they are important, and describe their relationship to current multimedia systems. While mouse and window-based user interfaces provide access to 2D graphics, video, and sound, virtual environments not only involve interactive 3D graphics, but further address all our senses through the use of spatial audio, haptics, and other modalities. While it is still a research goal to provide high-throughput video on demand, ubiquitous computing will require that multimedia network infrastructure also support extremely low-latency interaction among large numbers of mobile wireless users. To arrive at an understanding of the needs, capabilities, and potential of these new paradigms, we introduce their terminology and technology, and explain the basic system architectures being explored, leading up to a discussion of key current research issues and future directions.

Real-time display and manipulation of 3-D medical objects: the Voxel processor architecture

Abstract: The fundamental problems associated with the interactive display, manipulation, and editing of three-dimensional (3-D) objects obtained from medical imaging systems such as CT, PET, and MRI are addressed. Software, hardware, and firmware techniques for shaded graphics display of medical objects are described and evaluated in terms of flexibility and performance. A special purpose multiprocessor architecture (the Voxel Processor architecture) developed specifically for medical research, clinical diagnosis, and surgical planning is presented. The Voxel Processor implements a shaded graphics display system with rotation, scaling, translation, slice planes and tone scale transformations on gray-scale data in true real time. The high-speed image generation algorithms exploit the ability to partition object space and require only simple arithmetic and logical operations. Minimal preprocessing steps are required to prepare object data for the Voxel Processor, and the data are always readily accessible for analysis or editing. The architecture is highly structured and is ideally suited for VLSI implementation.

A Comparison of Perceptually-Based Metrics for Objective Evaluation of Geometry Processing

Abstract: Recent advances in 3-D graphics technologies have led to an increasing use of processing techniques on 3-D meshes, such as filtering, compression, watermarking, simplification, deformation, and so forth. Since these processes may modify the visual appearance of the 3-D objects, several metrics have been introduced to properly drive or evaluate them, from classic geometric ones such as Hausdorff distance, to more complex perceptually-based measures. This paper presents a survey on existing perceptually-based metrics for visual impairment of 3-D objects and provides an extensive comparison between them. In particular, different scenarios which correspond to different perceptual and cognitive mechanisms are analyzed. The objective is twofold: 1) catching the behavior of existing measures to help Perception researchers for designing new 3-D metrics and 2) providing a comparison between them to inform and help computer graphics researchers for choosing the most accurate tool for the design and the evaluation of their mesh processing algorithms.

Geust Editorial: Media processing: a new design target

Abstract: Harvard University igital information processing used to involve only numbers and text. Graphical user interfaces ( G U k with pull-down menus. icons. and windows-extended this to 1x0-dimensional graphics. Now we are seeing a transition to media-rich digital information This includes iinages, video, audio. 2D and 313 graphics, animation. text. and nunihers-collectively called multimedia information. Media processing-a shorter term for digital niultimedia inforination processing-is the decoding, encoding. interpretation, enhancement. and rendering of digital multiinedia information Multiniedia information has existed for a long time. but in the past it in\\.olved analog processing. When we digitally represent images, I;ideo, audio, graphics. and animation, we reduce thein to binaiy bits. which can be processed by digital processors. Real-time digital \\,ideo and audio. however, place certain minimum performance constraints on information de\\-ices and coniputers For example. displaying MPEG-1 standard compressed \\,ideo requires a device to decode and I-ender 30 video frames per second, each frame comprising on the order of lo i pixels. The processing complexity is on the order of lo3 operations per pixel per second, requiring on the order of 10’ MOPS (million operations per sec-

Shared translation address caching

Abstract: A memory controller hub includes a graphics subsystem adapted to perform graphics operations on data and a cache adapted to store of locations in physical memory available to the graphics subsystem for storing graphics data and available to a graphics controller coupled to the memory controller hub to store graphics data.