基于虚拟平面的广角镜头全景拼接

基于多图像级联拼接的全景成像技术常常使用广角镜头采集源图像。针对非线性的柱面模型、球面模型拼接鲁棒性较差,以及传统平面拼接模型占用存储空间过大的问题,提出一种基于虚拟平面的广角镜头拼接算法。通过将最后显示面进行网格化,并通过虚拟平面间、显示面、原图与虚拟平面间映射关系,找到网格点与原图的对应关系;再对显示面非格点区域进行位置索引插值,完成显示面填充。还通过基于虚拟平面的移动直接线性变换进行拼接优化;并使用级联拼接实现全景。实验证明与移动直接线性变换方法相比,细节效果相当且有速度提升,比柱、球面拼接方法拼接更为鲁棒。

Wide-angle lens image panoramic mosaic method based on virtual planes

Wide-angle lens based imaging stitching is a common solution for panorama. Original planar image stitching cannot be used in wide-angle lens image stitching straightforward because image registration costs too many memory spaces. There are serious non-linearity problems in cylindrical stitching or spherical stitching. A new linear method is proposed to handle wide-angle lens image stitching based on virtual planes. The experiments show that the method gains same results as planar methods with less costs of time or memory and gets better panorama by continuous mosaic.