Real Time Portrait Pick-up Based On Human Vision System Characteristics And Its Application In Virtual Image Environment

The manufacture of real-time photographing system in virtual environment meets the needs that the development of experience economic towards digital application system. The lucubrating of its key technology part --"real-time portrait pick-up", has introduced the achievement of virtual reality technology into virtual photographing system, made the ratio of performance and price increase greatly, strengthened the "human" function. At the same time, to some extent it also has the practical and academic referenced sense in dealing with the three obstacles ,such as "noble","computer overloaded with details" and "data crisis", which appearance when virtual reality technology put into reality.This article begin with analyzing the character of human vision , making use of the notion of system to balance the several technology targets, such as image quality, real-time capability ,the cost of system and so on, and at the basis of thorough analysis toward the concrete technology target of the virtual real-time photographing system, putting forward the real-time portrait pick-up arithmetic based on human vision system. According as the digital image processing target determined by human vision character , through a series of processes ,such as information condensation, statistics classify base on parameter self-adaptation , morphological non-linearity filtering , image fusion , reinforcing of color picture and so on, this arithmetic realize real-time image pick-up with the development of robust. This arithmetic has also embody the idea of information layered dispose of diversification field dealing, which exist in the mutual transition between 24 bit color picture and two-value characteristic picture. In terms of individually part of this arithmetic, this article has analyzed deeply, and offered the simulation picture in the Matlab environment. The simulation result has indicated that using the method of two-value filter can solve the question perfectly, and the question is the edge discontinuity of traditional image classify base on region; The image fusion which make use of edge gradually change is sententious and efficient; The color image reinforcing which realized by grey statistics histogram equalization method has reduced the need of environment brightness in virtual photographing system. The application of principle analysis, quantum experiment ,system experiment, and some arithmetic in products has proved the exactness of the method we have provided from several aspects. Through utilizing the VFW(video for window) function which provided by VC system, has realized this arithmetic under the platform of VC6.0, the application has indicated that the scheme which bring forward in this article is exactness and credibility.In the part of hardware of the virtual environment real-time photographing system, this article has discussed several parts, such as system structure, single chip microcomputer assistant manage unit and so on.