CCD校差摄影定位的原理及其静态结果

摄影测量因其机动性好、时效性高、目的性强、相对投入较低等优点成为获取地面信息的主要途径之一,具有广泛的应用。给出了利用两台普通CCD数码相机进行校差摄影测量获取的高精度定位结果的原理。将两台CCD数码相机相互垂直地安放在摄影装置上,两台相机同时对坐标已知的标志点进行摄影,综合利用摄影装置与标志点形成的角度观测量与所在区域的高程库信息,解算出摄影装置的高精度坐标。实验结果表明,校差摄影定位与实际的全站仪定位结果相比较,差值在2 cm左右。

CCD Photogrammetry Positioning Principle and Its Static Positioning Result

With merit of good mobility,efficacy,objectiveness and low investment,CCD Photogrammetry Positioning become one of the main methods for obtaining terrain information,which have widely applications.The mathematical model of high precise positioning principle using two common CCD digital cameras with assist of height information was discussed.The two CCD digital cameras were installed in a platform and were placed in a line which was vertical with the platform.The distance of two digital cameras was known.Two cameras simultaneity took pictures with the signs,whose coordinate were known.The angle among the digital camera and two other signs could be measured.With two angles and the known height information,the location of digital cameras could be solved.The results showed that the precise was better than 2 cm with actual observable data,comparing with total station surveying result.