一种空间经纬网的地表面影像填图方法

A Texture Mapping Method on Latitude-longitude Spherical Surface

作者对球体表面进行切分处理并与平面影像建立空间坐标关联,本项测试了一种坐标转换算法,并以编程方式实现了对球面影像的模拟贴图。整个过程主要包括三个环节:(1)确定球面与影像的空间坐标关联方案;(2)分别对球面及影像采取矩形化的切分处理;(3)在适当缩放各图像块比例后,对照球面坐标位置给予相应的填充,即实现了球面贴图。

After slicing the surface of the sphere and establishing the spatial coordinate association with the plane image,this paper tests a coordinate transformation algorithm,and realizes the simulation mapping of the spherical image by programming.The whole process mainly includes three steps:(1)determining the spatial coordinate correlation scheme between the sphere and the image;(2)the rectangular segmentation of the sphere and the image respectively;and(3)after properly scaling the proportion of each image block.the spherical map is realized by filling it according to the spherical coordinate position.