發(fā)布時(shí)間：2018-06-13 17:12

  本文選題：TDI + CCD推掃影像　； 參考：《武漢大學(xué)學(xué)報(bào)(信息科學(xué)版)》2016年05期

【摘要】：坐標(biāo)反變換即根據(jù)已知的物方坐標(biāo)求其像方坐標(biāo)的過程,是線陣推掃式影像幾何處理的重要計(jì)算環(huán)節(jié)。對(duì)于時(shí)間延遲積分電荷耦合器件(time delay integration charge coupled devices,TDI CCD)推掃影像,由于行積分時(shí)間跳變,若直接基于共線方程模型進(jìn)行坐標(biāo)反變換計(jì)算,不僅迭代次數(shù)多,在某些情況下還會(huì)出現(xiàn)不收斂的情況;利用有理多項(xiàng)式模型等通用成像幾何模型替代其共線方程模型時(shí),又存在擬合精度不高難以滿足實(shí)際要求的問題。對(duì)此,本文提出了一種基于虛擬掃描行的TDI CCD推掃影像坐標(biāo)反變換方法,巧妙地解決了TDI CCD推掃影像坐標(biāo)反變換的效率和精度問題,利用國產(chǎn)資源衛(wèi)星進(jìn)行實(shí)驗(yàn)驗(yàn)證了此方法的正確性和可行性。
[Abstract]:The inverse transformation of coordinates, which is an important part of the geometric processing of linear push-sweep images, is the process of calculating the image coordinates according to the known object coordinates. For the time delay integral charge coupled device (TDC) push-over image, because of the line integral time jump, if the coordinate inverse transformation is calculated directly based on the collinear equation model, not only the number of iterations is more, In some cases there will be no convergence and when the collinear equation model is replaced by the general imaging geometric model such as rational polynomial model there is a problem that the fitting accuracy is not high enough to meet the practical requirements. In this paper, a method of inverse transformation of TDI CCD push-scan image coordinate based on virtual scanning line is proposed, which solves the problem of efficiency and precision of the inverse transformation of TDI CCD push-scan image coordinate. The correctness and feasibility of this method are verified by using domestic resource satellite.
【作者單位】： 武漢大學(xué)測繪遙感信息工程國家重點(diǎn)實(shí)驗(yàn)室;國家測繪地理信息局衛(wèi)星測繪應(yīng)用中心;
【基金】：國家自然科學(xué)基金(40901209;91438111)~~
【分類號(hào)】：P23

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本文編號(hào)：2014757