Research on Analytical Problems of Satellite CCD Area Sensor Imagery

由于该研究项目的负责人京都大学冈本教授于1999年2月去世，服部博士于1999年最后一年继承了他的职位和研究工作。到目前为止，由于卫星CCD区域传感器的视场视角极窄，基于仿射投影的定向方法远比基于传统中心投影的定向方法稳定和精确。以下是1999年获得的初步结果。实际上，用于卫星的面积CCD传感器还没有完全发展起来。利用变焦镜头CCD相机进行了广泛的模拟和实验，以验证其测量精度，变焦镜头CCD相机具有与面积传感器相同的特性。该方法可用于岩崩监测或隧道收敛量的测量。特别是自由网络解决方案，在提高精度的同时也提高了精度。1999年秋天，一颗高分辨率成像卫星IKONOS发射升空，为进一步利用卫星制作高精度地图开辟了道路。作者将理论成果集中在卫星图像的定向和绘图上，建立了基于仿射投影法的一致性程序。虽然作者使用了目前可用的卫星；SPOT和MOMS-2P，假设对IKONOS的适应也是实用的。根据dtm或图像匹配结果，利用仿射投影生成正射图像。在此过程中，开发了一种使用最低要求控制点的高精度正射影生产系统。在PC机上开发了一种数字摄影测量系统，利用近似极几何图形绘制仿射投影立体图像。实验证明，该系统在绘图速度和精度方面具有一定的实用性。该数字摄影测量方法适用于桥箱、船体等高精度工业测量。高速性能是通过设计特殊目标和自动匹配实现的。少

Since the head of the research project, Prof. Dr. Okamoto in Kyoto University passed away in February of 1999, Dr. Hattori succeeded his position and research works in 1999, the final year. Until up then, affine projection-based orientation is far stable and precise than the methods based on conventional central projection due to extremely narrow field view angles of satellite CCD area sensors. The followings are primary results obtained in 1999.1. Area CCD sensors for satellites are not yet fully developed actually. Instead wide range of simulations and experiments were employed to verify the measurement accuracy using zoom-lens CCD cameras which have the same properties as area sensors. This method can be applied to monitoring of rock falls or measurement of tunnel convergence. Especially free-network solutions were proved effective to increase the precision as well as accuracy.2. In the fall of 1999 a high resolution imaging satellite IKONOS was launched, which opened the way to rea … More lization of high precision map production from satellites. The authors focused the theoretical achievements onto the orientation and plotting of satellite imagery and then established the consistent procedures based on the affine projection method. Though the authors employed currently available satellites ; SPOT and MOMS-2P, it is assumed that the adaptation to IKONOS is also practical.3. From DTMs or image matching results the ortho-images by use of affine projection were produced. In this course a tentative production system of high precision ortho-images using minimally required control points was developed.4. A digital photogrammetric system was developed on a PC to plot the affine projected stereo images by use of approximated epipolar geometry. The system was proved to be practical enough in plotting speed and precision.5, This digital photogrammetric method was applied to high precision industrial measurement for bridge boxes or ship hulls etc. The high-speed performance was realized by designing special targets and automatic matching. Less