景深效果能够增强计算机生成图像的真实感,因此关于这类效果的绘制已成为计算机图形学中的重要研究方向。针对景深效果的绘制问题,首先研究和分析各种相机镜头模型的光学成像原理,比较各类镜头模型的特点和模拟景深效果的能力;然后分类总结景深效果绘制的基本原理和典型算法,比较各类景深绘制方法的优缺点。最后指出景深效果绘制技术的应用价值,并展望未来的研究方向。

The depth-of-field effect can improve the realistic sense of a computer-generated image,and thus rendering of this effect has become one of the important research topics in computer graphics.Aiming at the problem for rendering the depth-of-field effect,in this paper we first study optical imaging principles which various kinds of camera lens models featuve,and compare their characteristics and capabilities of modeling the depth-of-field effect;then the taxonomy of rendering techniques for the depth-of-filed effect is presented.Relevant fundamental principles and typical algorithms are concluded,and their advantages and disadvantages are compared in detail.Lastly applications of rendering techniques for the depth-of-filed effect are presented and future research trends are foreseen.