不同视点重叠图象拼接方法研究

Automatic Mosaic of Multi-viewpoint Overlapped Image

不同视点重叠图象的拼接算法大都需要估计相机参数和每个像素的深度等 ,要求有较多的源图象 ,由于海上实景拍摄难度大 ,因此符合要求的源图象十分有限 .这些现有的算法对于生成生成船舶操纵模拟器中的视景并不适用 .根据船舶操纵模拟器对视景的要求和背景实景图象拍摄的具体要求 ,依据三维成像几何理论 ,建立了相邻重叠图象的成像几何模型 .在此基础上经数学推算得出 ,仅当重叠区域中的两物点位于同一景深面上或位于两视点垂直平分面上时 ,在左右像面上两相应像点间的距离才不产生变化 .由此提出在一定条件下的不同视点重叠图象的基于视点垂直平分面最深景物线和基于同深景物面平行景物线对的匹配算法和图象拼接的平滑算法 .实验结果表明 ,该算法的拼接效果较好 ,可推广到对背景几何精度要求不高的中远距离不同视点重叠图象的拼接应用中 .

The methods of multi-perspective mosaic ask mostly estimate the parameter of camera, the depth of every pixels, and more images. The ubiquitous disadvantage of these methods is over heavy calculation. On account of the difficulty of shooting on the sea, these methods will not serve the view of ship-handing simulator. So the mosaic method based on the simple 2D overlapped image is required, but the multi-perspective and shelter between the scenarios bring more difficulty. This paper construct a imaging geometric model of the overlapped images according the demand in view and background of ship-handing simulator, then proposes a automatic mosaic and smoothness method based on the most depth line on the vertical middle plane and the parallel line on the same depth plane. The experimental results show that the jointing efficiency of this algorithm is better, and it has wide application perspective at fields of multi-perspective mosaic.