【摘要】：針對敏捷成像中的多條帶拼接成像模型,對條帶圖像的拼接重疊度進行仿真分析。建立多條帶拼接成像的任務(wù)模型和幾何退化模型,提出重疊區(qū)域?qū)挾乳撝档呐袆e準則。針對星下點條帶,分析不同場景類型遙感圖像的重疊區(qū)域?qū)挾乳撝?探究了地面分辨率變化對重疊區(qū)域?qū)挾乳撝档挠绊�。針對敏捷條帶,分析了俯仰、橫滾等敏捷特性對于重疊閾值的影響。仿真結(jié)果表明,在0.46 m地面分辨率下,6類場景類型重疊寬度閾值均在28 pixels以上,其中軍港機場、海島閾值較大,超過31 pixels。閾值統(tǒng)計符合正態(tài)分布的3σ原則,證明了閾值求解方式的可信度。星下點成像時地面分辨率變化對像面重疊像素閾值無太大影響,但對地面實際重疊寬度閾值影響較大。而敏捷條帶成像時,衛(wèi)星的俯仰和橫滾將會增大條帶的重疊寬度閾值,幾何變形對閾值的影響超過星下點時地面分辨率的變化。通過對條帶拼接重疊度的仿真分析,為敏捷衛(wèi)星的高分辨率光學成像任務(wù)規(guī)劃提供了有意義的參考。
[Abstract]:Aiming at the multi-band splicing imaging model in agile imaging, the overlap degree of strip image is simulated and analyzed. The task model and geometric degradation model of multi-band splicing imaging are established, and the criterion of threshold value of overlapping region width is proposed. In this paper, the overlap region width threshold of remote sensing images of different scene types is analyzed, and the influence of ground resolution on overlapping region width threshold is discussed. The effects of pitch and roll on overlap threshold are analyzed. The simulation results show that at the ground resolution of 0. 46m, the threshold of overlap width of 6 kinds of scene types is above 28 pixels. The threshold of military port and airport and island is larger than 31 pixels.. The threshold statistics accord with the 3 蟽 principle of normal distribution, and the reliability of the threshold solution is proved. The change of ground resolution does not have much effect on the threshold of overlapping pixels in image plane, but it has a great effect on the threshold of actual overlap width of the ground. In agile strip imaging, the pitch and roll of the satellite will increase the overlap width threshold of the strip, and the effect of geometric deformation on the threshold will exceed the change of the ground resolution at the sub-star point. The simulation analysis of the overlap degree of strip splicing provides a meaningful reference for the high resolution optical imaging task planning of agile satellite.
【作者單位】： 浙江大學現(xiàn)代光學儀器國家重點實驗室;
【基金】：浙江省科技計劃項目(2017C01033)資助
【分類號】：TP751;V474.2

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