【摘要】：坐標反投影計算是線陣影像基于嚴格模型幾何校正的關(guān)鍵步驟。本文在分析線陣擺掃式影像的成像方式及其特點的基礎(chǔ)上,針對傳統(tǒng)基于像方的順序或迭代搜索方法效率低下的問題,提出了一種利用地物關(guān)系約束的坐標反投影計算方法。首先將當(dāng)前相鄰點的最佳掃描行作為先驗值,估算其與當(dāng)前點最佳掃描行的距離,定位初始最佳掃描行;然后以初始最佳掃描行為中心構(gòu)建搜索窗口,進行最佳掃描行精確搜索;最后根據(jù)最佳掃描行對應(yīng)的外方位元素進行坐標反投影計算。通過對機載線陣擺掃式模擬影像數(shù)據(jù)和推掃式真實影像數(shù)據(jù)的試驗,驗證了該方法的可行性、準確性和高效性。
[Abstract]:The calculation of coordinate anti-projection is a key step of line array image based on strict model geometric correction. In this paper, on the basis of the imaging mode and characteristics of the analysis line array, a method for calculating the coordinate anti-projection using the object relation constraint is proposed for the problem of low efficiency of the traditional image-based sequence or the iterative search method. firstly, the best scanning line of the current adjacent point is taken as a priori value, the distance between the best scanning line and the current point optimal scanning line is estimated, the initial optimal scanning line is positioned, and the searching window is constructed at the center of the initial optimal scanning behavior, and the optimal scanning line is searched accurately; and finally carrying out coordinate anti-projection calculation according to the outer bearing element corresponding to the optimal scanning line. The feasibility, accuracy and efficiency of the method are verified by the test of the on-board line-array-sweeping analog image data and the push-to-scan real image data.
【作者單位】： 信息工程大學(xué)地理空間信息學(xué)院;武漢大學(xué)測繪遙感信息工程國家重點實驗室;解放軍95899部隊;
【基金】：高分辨率對地觀測系統(tǒng)重大專項(GFZX04032201-1-1) 對地觀測技術(shù)國家測繪地理信息局重點實驗室開放基金(K201508)~~
【分類號】：P237
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本文編號：2410586