頁籤選單縮合
| 題 名 | Calibration of Location Coordinates in Chang'E-2 CCD Data=嫦娥二號CCD數據定位座標的校正 |
|---|---|
| 作 者 | 李智; 葉夢杰; 蔡占川; 唐澤聖; 葉夢杰; 唐澤聖; 蔡占川; | 書刊名 | 澳門科技大學學報 |
| 卷 期 | 9:1 2015.06[民104.06] |
| 頁 次 | 頁117-124 |
| 分類號 | 447.964 |
| 關鍵詞 | 嫦娥二號; CCD 2C級數據; 相對座標的校正; 圖像配准; Chang'E-2; CCD images; Coordinates calibration; Image registration; |
| 語 文 | 英文(English) |
| 中文摘要 | 嫦娥二號探月衛星CCD立體相機,在100km的環月軌道上獲取了月表空間分辨率優於10m/pixel的高分辨率CCD影像,但是其影像定位精度低,相對定位誤差大。本文利用圖像配准的思想並結合嫦娥二號CCD數據的特點,提出了一種對嫦娥二號CCD 2C級數據的相對定位校正方法,減小其相對定位誤差,解決高分辨率CCD影像與低影像定位精度的矛盾,為之後月球影像的鑲嵌做準備。首先,使用Harris角點檢測算子提取參考圖像的特徵點;其次,使用歸一化互相關的方法找到參考影像和待配准影像的重疊區域;接著,在重疊區域中,進行基於模板的特徵點對匹配;最後利用特徵同名點對對應的經緯度座標數據計算得到的變換矩陣,校正待配准圖像的經緯度座標。 |
| 英文摘要 | The CCD stereo camera of Chang'E-2 satellite produces the high spatial resolution images. However, the positioning precision is low. The coordinates of corresponding points in the adjacent orbits of 2C level CCD images exist considerable difference. Combining with the image registration technique and the characteristic of Chang'E-2 CCD images, a method of calibration the longitude and latitude coordinates is proposed in this paper. Firstly, feature points of reference image is extracted by Harris detector. Secondly, the overlapped region between reference image and target image is obtained by the normalized cross-correlation method. Next, in the overlapped region, the corresponding point pairs are established by area-based registration. Lastly, the coordinates of target image have been calibrated by means of the transformation matrix (it is computed by the corresponding pairs' coordinates). The proposed method can decrease the relative positioning error, improve location accuracy and solve the contradiction (CCD image of high spatial resolution and the location coordinates of low positioning accuracy) to prepare the mosaic of lunar images. |
本系統中英文摘要資訊取自各篇刊載內容。