虚拟现实是一种高度逼真的模拟人在自然环境中视、听、动等行为的人机界面。图形生成是虚拟现实技术的重要瓶颈。本文对面向虚拟现实的实时图形生成技术及其发展情况作了详细的介绍和综述。其主要内容是图形生成的硬件体系结构以及在虚拟现实的真实感图形生成中用于加速的各种有效技术。

This paper proposes a new approach for image segmentation which utlizes the wavelet transform theory developed recently. It is based on wavelet transform of the histogram of an image. The mathematical analyses show the physical meaning of threshold obtained by this new method treating .Experimental results show that the proposed method robust and efficient for treating various types of comples images and is able to automatically determine the parameters.