Lack of 3D content embarrassed 3D development. 2D images can be converted to 3D by auto- matic 2D -to -3D system,which can make 3D content generating more conveniently and cheaply. Auto- matic 2D- to- 3D processing includes image segmentation, depth extraction, depth fusion and assign- ment, depth image based rendering. This paper presents the methods and algorithm, and then introduces the situation of assessment methods researching for color and depth image based stereo video.%目前3D视频内容不足是制约3D技术发展的重要因素之一，自动2D-to-3D视频系统可以快速且低成本地将二维图像转换成双目立体图像。具有很好的发展前景。自动2D-to-3D视频系统分为图像分割、深度信息提取、深度的融合与分配、立体图像生成等多个部分，本文对自动2D-to-3D系统的各个组成部分的原理与主要算法进行了介绍与分析，最后，还介绍了自动2D-to-3D系统生成的图像客观评价的发展情况。
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