【摘要】：坐標(biāo)反投影計(jì)算是線陣影像基于嚴(yán)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(diǎn)的基礎(chǔ)上,針對(duì)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(biāo)反投影計(jì)算方法。首先將當(dāng)前相鄰點(diǎn)的最佳掃描行作為先驗(yàn)值,估算其與當(dāng)前點(diǎn)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(jìn)行最佳掃描行精確搜索;最后根據(jù)最佳掃描行對(duì)應(yīng)的外方位元素進(jìn)行坐標(biāo)反投影計(jì)算。通過對(duì)機(jī)載線陣擺掃式模擬影像數(shù)據(jù)和推掃式真實(shí)影像數(shù)據(jù)的試驗(yàn),驗(yàn)證了該方法的可行性、準(zhǔn)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(cè)繪遙感信息工程國(guó)家重點(diǎn)實(shí)驗(yàn)室;解放軍95899部隊(duì);
【基金】：高分辨率對(duì)地觀測(cè)系統(tǒng)重大專項(xiàng)(GFZX04032201-1-1) 對(duì)地觀測(cè)技術(shù)國(guó)家測(cè)繪地理信息局重點(diǎn)實(shí)驗(yàn)室開放基金(K201508)~~
【分類號(hào)】：P237
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本文編號(hào)：2410586