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Satellite-based auroral tomography and time-varying volume reconstruction.

機(jī)譯:基于衛(wèi)星的極光層析成像和時(shí)變體重建。

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摘要

Tomography, originally developed to observe the internal structure of a human body in medical applications, can also be applied to research in Space Science applications. An upcoming satellite mission incorporates two imagers for auroral observation in the upper atmosphere. For this mission, development of auroral volume reconstruction using tomographic imaging is useful for understanding the internal structure of auroras. We have shown that beam-pixel clipping in image reconstruction improves the quality of reconstructed images, compared to previous techniques. The goal is to develop a suitable algorithm for auroral volume reconstruction using auroral images measured from satellite-borne optical instruments. We have demonstrated that weighting factor approximation in algebraic methods plays a crucial role in the quality of volume reconstruction. We also have evaluated the effectiveness of this algorithm with measured images of known volumes using perspective projections. In addition, a time-varying volume reconstruction scheme is discussed where auroras move over time.
機(jī)譯:層析成像最初是為觀察醫(yī)學(xué)應(yīng)用中人體的內(nèi)部結(jié)構(gòu)而開發(fā)的,也可以應(yīng)用于空間科學(xué)應(yīng)用的研究。即將進(jìn)行的衛(wèi)星飛行任務(wù)包括兩臺(tái)成像儀,用于在高空進(jìn)行極光觀測(cè)。對(duì)于此任務(wù),使用層析成像技術(shù)開發(fā)極光體積重建對(duì)于理解極光的內(nèi)部結(jié)構(gòu)很有用。我們已經(jīng)顯示,與以前的技術(shù)相比,圖像重建中的束像素裁剪提高了重建圖像的質(zhì)量。目標(biāo)是開發(fā)一種合適的算法,用于使用從衛(wèi)星光學(xué)儀器測(cè)得的極光圖像重建極光。我們已經(jīng)證明,代數(shù)方法中的加權(quán)因子近似對(duì)體積重建的質(zhì)量起著至關(guān)重要的作用。我們還使用透視投影對(duì)已知體積的測(cè)量圖像評(píng)估了該算法的有效性。另外,討論了一個(gè)時(shí)變體重建方案,其中極光會(huì)隨著時(shí)間移動(dòng)。

著錄項(xiàng)

  • 作者

    Kim, Hyojin.;

  • 作者單位

    University of New Hampshire.;

  • 授予單位 University of New Hampshire.;
  • 學(xué)科 Computer Science.
  • 學(xué)位 M.S.
  • 年度 2008
  • 頁碼 65 p.
  • 總頁數(shù) 65
  • 原文格式 PDF
  • 正文語種 eng
  • 中圖分類
  • 關(guān)鍵詞

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