摘要
推扫式光学卫星遥感影像系统校正与精纠正的几何模型通常用一个二维仿射变换模型表示,系统几何校正产品和精纠正产品中仍然包含了地形起伏信息。为了对这些信息加以应用,本文仿照RFM(有理函数模型)用于辐射校正产品几何处理的思路,提出利用RFM对系统几何校正产品、精纠正产品求解RPC参数并进行三维几何处理的技术和方法。分别利用一景北京地区10m和2.5m分辨率SPOT5 HRG各级影像产品进行了正射纠正试验,利用北京地区两景异轨5m分辨率SPOT5 HRG的各级影像产品进行了立体定向试验,结果表明,各级影像产品的三维几何模型可以用三阶分母不相同的RFM替代,与直接应用辐射校正产品影像模型进行正射纠正和立体定向的精度一致。
The traditional systemic geometric correction and exact rectification of push-broom optical satellite image uses a pure two-dimensional affine transformation geometric model.The product rectifying is not completely,the terrain information is kept in the products.In order to make use of the information,this paper proposed a conceptual three-dimensional geometric model for systemic geometric correction and exact rectified product.On the basis of deducing three-dimensional geometric model,the paper also analyzed the feasibility of applying the RFM to replace this three-dimensional geometric model.Ortho product has been made from all the levels of products based on the three-dimensional geometric model.A comparison between the accuracies of stereo-orientation with systemic geometric correction product and the raw product has been made.SPOT5 HRG and HRG images were used to verify.The result of the experiment indicates that the PRC model accurately identifies the deformation pattern of the geometrical corrected product of push-broom optical satellite image.The RFM simplifies the three-dimensional geometric model for systemic geometric correction product,but does not compromise its accuracy.Therefore,this paper provides an innovative,theoretical,and experimental basis for the definition of image product levels.
出处
《遥感信息》
CSCD
2011年第2期58-62,共5页
Remote Sensing Information
基金
国家科技支撑(2011BAB01B01)
国家自然科学基金(40930532)
国家863(2007AA1202032
009AA12Z145
2008AA121203)
