本文選題：衛(wèi)星振動(dòng)　切入點(diǎn)：TDICCD相機(jī)　出處：《光學(xué)精密工程》2016年06期 　論文類型：期刊論文

【摘要】：衛(wèi)星振動(dòng)不僅會(huì)引起TDI(Time Delay and Integration)CCD相機(jī)像元采樣的不規(guī)則性,還會(huì)引起像元彌散斑空間分布的不一致性,導(dǎo)致圖像傳遞函數(shù)(Modulation Transfer Function,MTF)產(chǎn)生空間變化,從而制約高分辨率圖像振動(dòng)復(fù)原質(zhì)量。本文從衛(wèi)星振動(dòng)對(duì)TDICCD相機(jī)推掃成像采樣過程的作用機(jī)理出發(fā),結(jié)合理論推導(dǎo)與仿真研究,得到了平臺(tái)振動(dòng)引起的圖像空間移變降質(zhì)及表征方法。然后在振動(dòng)復(fù)原模型的基礎(chǔ)上,推導(dǎo)得出MTF空間移變降質(zhì)對(duì)復(fù)原處理誤差的影響,并基于實(shí)際衛(wèi)星圖像開展了復(fù)原實(shí)驗(yàn)。實(shí)驗(yàn)結(jié)果表明:當(dāng)振動(dòng)所致圖像MTF空間移變降質(zhì)小于15%時(shí),復(fù)原處理后的圖像與理想圖像的結(jié)構(gòu)相似度優(yōu)于0.95,而且處理誤差所導(dǎo)致的圖像失真不影響判讀質(zhì)量。
[Abstract]:Satellite vibration will not only cause irregular sampling of pixel in TDI(Time Delay and Integration)CCD camera, but also cause inconsistency of spatial distribution of pixel dispersion spots, resulting in spatial variation of image transfer function modulation Transfer function. In order to restrict the quality of high-resolution image vibration restoration, this paper starts from the mechanism of satellite vibration sampling process of push-scan imaging of TDICCD camera, combining with theoretical derivation and simulation research. Based on the vibration restoration model, the effect of MTF space shift and reduction on the error of restoration processing is derived. The experiment is carried out based on the actual satellite image. The experimental results show that when the spatial shift and mass reduction of the image caused by vibration is less than 15, The structural similarity between the reconstructed image and the ideal image is better than that of the ideal image, and the distortion caused by the processing error does not affect the interpretation quality.
【作者單位】： 哈爾濱工業(yè)大學(xué)空間光學(xué)工程研究中心;
【基金】：國(guó)家973重點(diǎn)基礎(chǔ)研究發(fā)展計(jì)劃資助項(xiàng)目(No.613210)
【分類號(hào)】：V445.8

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