本文選題：Landsat- + 長條帶影像�。� 參考：《中國圖象圖形學報》2017年09期

【摘要】：目的 Landsat-8傳感器采用線陣推掃式成像,通過分景處理獲得標準景產(chǎn)品。面對大范圍遙感數(shù)據(jù)需求,長條帶數(shù)據(jù)具有更高的應用價值。長條帶數(shù)據(jù)的一般獲取方法是通過拼接標準景正射產(chǎn)品的方式,該方法處理效率不高,并且當條帶中某景由于云覆蓋量較多無法生產(chǎn)正射產(chǎn)品時,將無法通過多景拼接的方式生成相應的長條帶正射產(chǎn)品。針對此方法存在的問題,本文提出一種Landsat-8長條帶影像的正射校正方法。方法以長條帶影像為整體,通過控制點匹配、長條帶幾何精校正和正射校正3個部分,直接生成長條帶級別的正射校正產(chǎn)品。在長條帶幾何精校正過程中,提出了Landsat-8的基于軌道約束的長條帶平差模型及控制點優(yōu)化選取方法。結(jié)果在15景的條帶長度范圍內(nèi),本文方法生成的長條帶正射產(chǎn)品的幾何精度在12 m以內(nèi),滿足Landsat-8正射產(chǎn)品的精度要求,且處理效率相較于標準景拼接方式提升1倍左右;對于云覆蓋較多的景,利用連續(xù)3景進行長條帶正射校正,可以得到與標準景正射產(chǎn)品幾何精度相當?shù)拈L條帶正射產(chǎn)品。結(jié)論本文提出的長條帶處理方法,在一定長度范圍內(nèi),能夠得到滿足Landsat-8正射產(chǎn)品的精度要求的長條帶正射產(chǎn)品,處理效率得到較大提高,且能夠有效克服傳統(tǒng)方法中云覆蓋情形對長條帶產(chǎn)品獲取的限制。
[Abstract]:Objective to obtain the standard Landsat-8 sensor by using linear push-scan imaging. In the face of a wide range of remote sensing data demand, strip data has higher application value. The general method of obtaining long strip data is by splicing the standard shot products. This method is inefficient, and when a scene in the strip can not produce orthotropic products because of the large cloud coverage, You will not be able to generate the corresponding long strip forward shooting product by multi-view splicing. Aiming at the problems of this method, this paper presents a orthophoto correction method for Landsat-8 strip images. Methods the long strip image was taken as a whole. Through the control point matching, the strip geometric precision correction and the orthophoto correction, the product of the long strip level orthophoto correction was generated directly. In the process of strip geometric fine correction, the adjustment model of long strip based on orbit constraint and the optimal selection method of control point of Landsat-8 are put forward. Results the geometric accuracy of the long strip forward projectile produced by this method was less than 12 m in the range of the strip length of 15 scenes, which satisfied the precision requirement of the Landsat-8 forward shooting product, and the processing efficiency was about twice higher than that of the standard pattern. For the scene with more cloud cover, the long strip forward projecting product with geometric accuracy comparable to the standard one can be obtained by using 3 consecutive scenes to correct the long strip forward projection. Conclusion the long strip processing method proposed in this paper can obtain the long strip positive projectile which can meet the precision requirement of the Landsat-8 forward projectile in a certain length range, and the treatment efficiency has been greatly improved. And it can effectively overcome the limitation of cloud coverage in traditional methods to obtain strip products.
【作者單位】： 中國科學院遙感與數(shù)字地球研究所;中國科學院大學;山東省國土測繪院;
【基金】：中國科學院遙感與數(shù)字地球所所長青年基金(A類)
【分類號】：TP751

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