| 视频的特定时空求解方法研究 |
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| 引用本文： | 徐辉,潘美虹,王松静.视频的特定时空求解方法研究[J].测绘科学,2018(3):104-110,141. |
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| 作者姓名： | 徐辉 潘美虹 王松静 |
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| 作者单位： | 宁波大学,浙江宁波,315211 |
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| 基金项目： | 浙江省教育厅科研项目，浙江省哲学社会科学规划课题 |
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| 摘 要： | 针对视频数据分析中确定一段视频的拍摄地点和日期的问题,提出了一种基于太阳影子轨迹的视频拍摄时空求解方法。该方法基于日冕原理,结合图像处理以及相机标定等技术,通过建立视频中物体的投影点坐标关于经、纬度,日期,太阳高度角,太阳方位角,太阳时角以及太阳赤纬角之间的函数关系式,用最小二乘法反演出视频拍摄地所在经纬度及拍摄日期。仿真结果表明,该方法能准确且快速地确定出视频拍摄的地理位置与日期,从技术上克服了目前现存方法的缺陷。
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| 关 键 词： | 太阳影子 日冕原理 图像处理 相机标定 最小二乘法 shadow trajectory corona principle image processing camera calibration the least square method |
Research on specific spatio-temporal solution method based on video |
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| XU Hui,PAN Meihong,WANG Songjing.Research on specific spatio-temporal solution method based on video[J].Science of Surveying and Mapping,2018(3):104-110,141. |
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| Authors: | XU Hui PAN Meihong WANG Songjing |
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| Abstract: | Aiming at the problem of determining the location and date of a video in video data analysis,a temporal and spatial solution method based on the shadow of the sun is proposed in this paper.Based on the principle of the corona,this method combines image processing and camera calibration to establish the functional relationship between the projection point coordinates of objects in the video on warp,latitude,date,solar high degree angle,solar azimuth,solar time angle and declination of the sun.Then use the least square method to anti the latitude and longitude of the video shooting place and the date of shooting.The simulation results show that the method can accurately and quickly determine the geographic location and date of video shooting,and overcome the defects of existing methods. |
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