摘要
太阳影子定位技术可以通过分析视频中物体的影子变化来确定视频的拍摄位置。首先,根据影长与物体高度、拍摄时间、标准时间、经纬度和大气折射率等参数之间的关系,建立了物体影长模型。其次,若已知物体不同时刻的影子测量坐标时,由于影长和影子角度偏转量的理论值现仅与物体高度和经纬度有关,可根据影长与影子角度在某位置的理论值和实际值之间的总误差最小,建立确定物体拍摄位置的模型。最后,先采用全局搜索法,在限定影长和角度偏转量总误差范围的条件下,给出了决策变量的粗略范围。在此基础上再采用局部搜索法,进一步缩小影长和角度偏转量总误差的限定范围,最后搜索出较为合理的拍摄位置。
Thc sun＇s shadow positioning technology is based on thc analysis of thc changc on shadow of thc objects in thcvideo to dctcrmiinc thc video filmiing position. First of all according to thc relationship bheights of a shadowand an object,time,standard time,latitude and longitude and the acould establish the miodcl of the object shadow. Thcn, if the shadow coordinate on the object of different timie is known,because the theoretical value of the length of shadow and the shadow angle deflection is only related with the object height and latitude and longitude,according to the shadow length and the shadow angle in a certain position of total miinimiumi er-ror between theoretical value and rcalitic value,we could dctcrmiinc the object miodcl of the fthe global search method,limiting the total error ranges about the shadow length and angle of deflection,rough scope of decision variables is given. Again on this foundation, we used the local search micthod to further reduce the total error of shadow length and angle of deflection, and finally could search out the reasonable position.
出处
《黄冈师范学院学报》
2016年第6期55-59,共5页
Journal of Huanggang Normal University
关键词
影子定位
影长
角度偏转量
shadow positioning
shadow length
angle deflection amount
