摘要
针对内视场光学分割型相机,利用子影像同名像点虚拟影像坐标相等这一约束条件,提出一种高准确度子影像几何拼接方法.首先在分析各CCD几何安置误差的基础上,设计拼接关系并给出拼接参量计算方法;其次结合SIFT等高准确度影像匹配算子对拼接模型进行优化选择,给出子影像拼接流程;最后采用附加参量自检校技术进行畸变参量再精化处理.利用所提方法对一款自行设计的数字大面阵复合相机进行几何拼接试验,结果表明该方法能够有效解决高准确度子影像几何拼接、高量测性能大幅面虚拟影像生成问题,拼接后影像内符准确度可达子像元级,满足航测作业对数字航摄相机测图准确度和摄影效率的应用要求.
An approach about how to stitch the sub-images to produce a high accuracy metric virtual image for optical splitting field of view camera was presented utilizing the constraint condition that virtual image coordinated of corresponding points in sub-images must be equal.Firstly,based on the analyzing of CCDs installation geometry error the stitching relations were designed and the sketch of stitching parameters was given;secondly,the optimized model assisted with the image matching operator was selected,such as SIFT etc.and workflow of sub-image stitching was expounded;lastly,stitch images distortion parameters refinement were processed making use of additional parameters self-calibration technology.The proposed method was verified by one self-design and manufacturing synthesized camera,and the inner precision of stitched images is within sub-pixel level that meets completely the requirements of mapping accuracy and imaging efficiency for a digital aerial photogrammetric camera.
出处
《光子学报》
EI
CAS
CSCD
北大核心
2015年第4期140-147,共8页
Acta Photonica Sinica
基金
国家高分对地观测重大专项(No.GFZX04030301)
国家自然科学基金(No.40901199)资助
关键词
数字航摄相机
光学分割器
视场
子影像
拼接
几何量测性能
虚拟影像
中心投影
Digital airborne camera
Optical splitter
Field of View （FOV）
Sub-image
Stitching
Geometry metric performance
Virtual image
Perspective projection
