基于最小二乘的视频定位阴影反演方法研究

Positioning of Video Capturing Spot Using Object Shadow Optimized Inversion Based on Least Square Method

为定位一段视频的拍摄地点和时间,可以根据视频拍摄的固定物体影子变化的规律进行测算。作者通过对已知视频中物体阴影影像进行分析,依据小孔成像原理反演优化得到实际影长,再根据实际影长的变化规律,利用最小二乘原理优化并通过遗传算法进行搜索反演得到拍摄地点经度、拍摄地点纬度以及拍摄时间等信息。

Aiming at positioning of a video capturing spot,estimation using the still object shadow in the video can be adopted.By analyzing the object shadow captured in the video,the actual shadow length can be achieved first according to the pinhole imaging principle,then the information of latitude,longitude and shooting date can be inferred using the least square method for optimized inversion and genetic algorithm for searching.