空載三線式掃描儀影像立體定位之研究

3-D Positioning for Airborne Three-line-scanner Imagery

陳良健(Liang-Chien Chen) ； 林士哲(Shih-Che Lin)

《航測及遙測學刊》 11卷4期 (2006/12) Pp. 381-402

https://doi.org/10.6574/JPRS.2006.11(4).3

摘要

空載三線式掃描儀具有較高的空間和光譜解析力，且影像具有良好之幾何交會條件，可為環境遙測、立體定位之資料來源。由於飛行中可拍攝三個方向影像，其成像具有高重疊的特性。在本研究中加入附加參數計算影像像坐標，外方位參數使用時間的多項式進行密合，並使用光束法完成方位求解，最後並使用最小二乘過濾法修正系統誤差。測試資料共包含六個航帶，使用每一航帶之三張不同拍攝方向影像之影像連結點，並加入航帶之間的航帶連結點進行求解。實驗結果顯示以多航帶光束法求解方位，並加入交叉之航帶後，可提升整體精度。

關鍵字

三線掃描儀 ； 光束法 ； 最小二乘過瀘 ； ADS 40

並列摘要

Airborne three-line-scanner images have the merits of high spatial and spectral resolutions and excellent converging geometry. Thus, the images have become an important data source in environmental remote sensing and three dimensional positioning. The three-line-scanner acquires three different direction images, which have plenty of overlapped area in flying. Thus, the bundle adjustment is selected to calculate the dynamic orientation parameters. To compensate for the systematic errors, additional parameters arc included in the adjustment. The orientation parameters arc modeled using low-order polynomials with respect to time by employing GCPs and tie points. The process might contain local systematic errors for the data with high dynamics, thus, a least squares filtering that performs orbit collocation is included. The test data include six strips. In the bundle adjustment, the tie points are selected for each of the three-look images that appear in the overlapped area of strips. The experimental results indicate that the bundle adjustment could reach higher accuracy when the cross strips are employed.

並列關鍵字

Three-Line-Scanner ； bundle adjustment ； Least Squares Filtering ； ADS 40