TY - JOUR
T1 - A realtime model‐based facial image synthesis based on multiprocessor network
AU - Morishima, Shigeo
AU - Kobayashi, Seiji
AU - Harashima, Hiroshi
N1 - Copyright:
Copyright 2016 Elsevier B.V., All rights reserved.
PY - 1991
Y1 - 1991
N2 - Model‐based image coding has been highlighted recently as a high‐efficiency coding method for TV telephone and TV conference systems. In a model‐based coding system, an ultralow‐rate image transmission is realized by obtaining common models of a facial image at both sides of a communication and by transmitting only modification parameters between them. However, it is difficult to realize a realtime processing of a model‐based coding with a conventional iterative‐processing type computer since the amount of material to analyze and synthesize at both sides is very large. Realtime processing is absolutely necessary to realize a practical system using this method, i.e., highspeed processings at both the transmitter and receiver are required. This paper describes a realtime facial image synthesis method based on a multiprocessor construction with a transputer. The transputer is a microcomputer having a communication capability with multiple processors and 10 MIPS CPU performance. Using this system in a pipeline processing with 20 processors, it is possible to synthesize realtime facial images at a rate of about 16 frames per second. If only a part around the lips is transmitted, it is possible to synthesize an image at a rate of about 40 frames per second with a network using five processors.
AB - Model‐based image coding has been highlighted recently as a high‐efficiency coding method for TV telephone and TV conference systems. In a model‐based coding system, an ultralow‐rate image transmission is realized by obtaining common models of a facial image at both sides of a communication and by transmitting only modification parameters between them. However, it is difficult to realize a realtime processing of a model‐based coding with a conventional iterative‐processing type computer since the amount of material to analyze and synthesize at both sides is very large. Realtime processing is absolutely necessary to realize a practical system using this method, i.e., highspeed processings at both the transmitter and receiver are required. This paper describes a realtime facial image synthesis method based on a multiprocessor construction with a transputer. The transputer is a microcomputer having a communication capability with multiple processors and 10 MIPS CPU performance. Using this system in a pipeline processing with 20 processors, it is possible to synthesize realtime facial images at a rate of about 16 frames per second. If only a part around the lips is transmitted, it is possible to synthesize an image at a rate of about 40 frames per second with a network using five processors.
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U2 - 10.1002/scj.4690221307
DO - 10.1002/scj.4690221307
M3 - Article
AN - SCOPUS:0026399893
VL - 22
SP - 59
EP - 69
JO - Systems and Computers in Japan
JF - Systems and Computers in Japan
SN - 0882-1666
IS - 13
ER -