This paper introduces the types and uses of stereocopic glasses,explains the principles of visual differences and stereo effects in scientific visualization and virtual encironment,and gives an algotirhm for rendering stereographics.

Using the MATLAB software,the paper explored the method of thematic data processing by Principal Component Analysis Model,and analyzed,evaluated the result with the scientific visualization function of MATLAB.

So in this paper,we review the conceptions of scientific visualization,analyze its characteristics different from traditional visualization,and then explore how scientific visualization means are used rightly in the environmental mapping and research,especially in the representation of dynamic environmental information and visual interaction exploration.

Most possibilities of geo-visualization base on MATLAB software are discussed in this paper,including surface data visualization,volume data visualization,geo-modeling,development of visualization system,virtual reality,and electronic mapping.

Boundary extraction and segmentation is an indispensable tool of special organizations quantitative information extraction in medical image and it is the basis of analyzing, understanding and handling the images, and it is an important prerequisite to medical visualization.

In this thesis, we use surface modeling into medical visualization domain to describe the 3D model of skin and skull sur.