ISSN:0167-7055    

DOI:10.1111/j.1467-8659.1988.tb00592.x

出版商:Blackwell Publishing Ltd    

年代:1988

数据来源: WILEY

摘要:

AbstractInteractive 2‐D systems have benefited greatly from the improvements in 1C technology. Today, the trend is to relieve the host computer from low level tasks through increasing the graphic system's computational power. The introduction of video RAMs has solved the problem of contention for memory cycles between the display generator and the video refresh controller. The improvements in graphic controllers have led from the first fixed instructions controllers to today's third generation of programmable graphic processors, able to support computer graphic interface standards. This article will present this evolution, and focus on a 2‐D graphic processor designed at the Imagery, Instrumentation and Systems Laboratory, based on the separation of graphic generation and memory management functi

ISSN:0167-7055    

DOI:10.1111/j.1467-8659.1988.tb00593.x

出版商:Blackwell Publishing Ltd    

年代:1988

数据来源: WILEY

摘要:

AbstractThe geometric processing stage in a computer graphic system is generally realised in VLSI or dedicated hardware, this paper describes the use of a Digital Signal Processor (DSP). By using a programmable DSP the hardware design effort is displaced into software. Using a single DSP in a co‐processor configuration the speed of the vertex processing stage within the geometric processor is increased by a factor of five compared to a high performance microprocessor. The use of DSPs in a multi‐processor system is also discus

ISSN:0167-7055    

DOI:10.1111/j.1467-8659.1988.tb00594.x

出版商:Blackwell Publishing Ltd    

年代:1988

数据来源: WILEY

摘要:

AbstractThis paper describes an experimental interactive graphics interface, GRAFLOG, in which drawings receive linguistic interpretations. It is possible to emulate linguistic interaction in situations where graphics is thought to be necessary. The paper presents examples of such a kind of dialogue and the architecture of the implementation. The paper explains how representations of drawings can be constructed by treating graphical symbols as “objects”, and how a parallel linguistic interpretation for these symbols can be constructed. It highlights the relevance of “deictic expressions” and “spatial prepositions” in building the interface mechanisms between these two kinds of representations. Lastly, it shows how a reasoning component is constructed for making deductions from premises that are found in both the graphical and linguistic domains. Using GRAFLOG, it is possible to represent knowledge through words and pictures. GRAFLOG is implemented, using an object oriented programming style, in PRO

ISSN:0167-7055    

DOI:10.1111/j.1467-8659.1988.tb00595.x

出版商:Blackwell Publishing Ltd    

年代:1988

数据来源: WILEY

摘要:

AbstractThis paper describes the work done in creating a computer program capable of modelling rooted trees and in particular the branching structures of botanical and bronchial trees. Simplicity of design and flexibility of use was achieved by generalising the program to handle any rooted branching structure with the particular form being dictated by various controlling parameters which can be modified via a direct manipulation interface. The program provides a graphical display of the resultant tree and leaf distribution. The open skeletal design allows the user to tailor the program to a particular model and to easily access data derived by the model.

ISSN:0167-7055    

DOI:10.1111/j.1467-8659.1988.tb00596.x

出版商:Blackwell Publishing Ltd    

年代:1988

数据来源: WILEY

摘要:

AbstractThis paper describes the design, implementation and initial evaluation of a graphical dialogue specification language and its interpreter. Features of the system include a hierarchical dialogue structure with the capability to export options to lower levels of the hierarchy, the use of a restricted form of production rule approach to option selection in each unit of the dialogue, and suspended time editing (allowing modification of the dialogue specification during execution without loss of context).

ISSN:0167-7055    

DOI:10.1111/j.1467-8659.1988.tb00597.x

出版商:Blackwell Publishing Ltd    

年代:1988

数据来源: WILEY

摘要:

AbstractA method of synthesising and animating a realistic image of a person's face by means of computer graphics is described. The key feature contributing to realism in image synthesis lies in the use of texture mapping in the rendering of surface detail on the face. Full facial animation is made possible by manipulating a 3‐D model of the face in conjunction with a relatively small data set of pre‐stored sub‐i

ISSN:0167-7055    

DOI:10.1111/j.1467-8659.1988.tb00598.x

出版商:Blackwell Publishing Ltd    

年代:1988

数据来源: WILEY

ISSN:0167-7055    

DOI:10.1111/j.1467-8659.1988.tb00599.x

出版商:Blackwell Publishing Ltd    

年代:1988

数据来源: WILEY

ISSN:0167-7055    

DOI:10.1111/j.1467-8659.1988.tb00600.x

出版商:Blackwell Publishing Ltd    

年代:1988

数据来源: WILEY

ISSN:0167-7055    

DOI:10.1111/j.1467-8659.1988.tb00601.x

出版商:Blackwell Publishing Ltd    

年代:1988

数据来源: WILEY