研究了虚拟演播室中，节目主持人实拍图象与计算机生成的虚拟环境的一种无缝合成技术，提出了用以视频对象分割边缘等分抽样点为型值点的闭合B样条曲线，建立视频对象的平面格网真实感图形的算法，并用于虚拟演播室中节目主持人图象的真实感图形建立，通过对单个节目主持人视频摄像输入的实验，对算法的可行性进行了验证，实验结果表明，该算法对视频对象做基于分割边缘线拟合的简单三维重建是有效的，且具有自适应性。

A scheme about the technology for the seamless composition between the presenter image shot by vidicon and the virtual environment image coming from computer in virtual studio has been investigated in this paper. A algorithm has been presented in which the plane wireframe mesh about the video object would be constructed by closed B spline based on the editable points (EP) coming from unbiased partitioning sample points on the segmentation edge about the video object. This algorithm has been used for the construction of the vision realistic graphics for the presenter in the virtual studio. The experiment has been accomplished to validate the feasibility of the algorithm submitted in this paper, which is carried through capturing on image sequences of single presenter by shooting from vidicon. The experimental result has shown the validity of the algorithm for the simple 3D reconstruction of the video object by fitting the segmentation edge curve and proved that the algorithm is effective and self adapting in the building of the graphical mesh.