交互式立体显示中基于图像拼合的视点合成

在立体显示中,视点合成是实现交互性的关键技术,即在三维(3D)场景中通过自由选择视点而获得环视能力.本文将视点插值和基于图像拼合的视点变形技术相结合,提出一种中间视合成算法.首先均匀化原始立体图像对;然后只对前景对象区域进行视差估计以提高视差匹配的速度和精度;接着确定左右视点中的可靠区域,根据可靠区域生成过渡中间视点;最后,采用视点插值结合变形的方法,由过渡视合成中间视点.实验结果表明合成的中间视点图像质量良好,而且合成速度也明显提高.本文算法可用于实时 3D 视频应用的交互式立体显示,可以实现任意视点的实时绘制.

Image Mosaic Based View Synthesis for Interactive Stereoscopic Display

In stereoscopic display, view synthesis is a key technology to realize interactivity what is the ability to look around within a three dimensional (3D) scene by freely choosing a viewpoint. This paper presents an interme-diate view synthesis algorithm, combining view interpolation with view morphing based on image mosaic. Firstly,the original stereo image pairs are normalized. Then, the disparity of only object area is estimated by a predict re-eursion method to improve the matching speed and accuracy. Afterward, credible areas in left and right views should be determined and chosen to create a transitional view. At last, a method combining view interpolation and morphing is used to synthesis the intermediate view from the transitional view. Experimental results show that the edge of created intermediate view object is clear and smooth, and the processing speed of view synthesis is obvious-ly improved. This algorithm can be used in interactive stereoscopic display in various 3D video applications that an arbitrary view needs to be rendered in real-time.