頁籤選單縮合
題 名 | SPOT衛星影像於裸露地變遷之偵測研究=The Study of the Application of SPOT Image on Detecting the Change of Bare Area |
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作 者 | 陳信雄; 邱祈榮; 黃筱梅; | 書刊名 | 國立臺灣大學農學院實驗林研究報告 |
卷 期 | 15:4=234 2001.12[民90.12] |
頁 次 | 頁291-301 |
分類號 | 436.12 |
關鍵詞 | 變遷偵測; 地形效應; 植生指標; 直線迴歸; SPOT; Change detection; Topography; Vegetation index; Linear regression; |
語 文 | 中文(Chinese) |
中文摘要 | 因為衛星遙測影像資料具多光譜、週期性與數位化之特性,所以對於大範圍的土地變遷偵測,地面資源調查、管理等,能提供即時且精確的資料。因此,本研究採用SPOT衛星影像以探討不同時期之地面覆蓋變遷。 由於衛星影像會因地形效應之影響,產生陰影區域而影響到資料之準確性。故將兩期影像分別扣除陰影部分,僅探討非陰影區域之變遷。其中,分成先行扣除陰影再進行迴歸分析,以及於迴歸分析結速後再行扣除陰影區域兩種。 採用的植生指標包含植生指標差(DVI)、影像比例法、常態化植生指標(NDVI)、轉換植生指標(TVI)及植生差比值等五種,以偵測裸露區域之變遷。利用簡單直線迴歸方式,決定變遷與否;並且探討不同信賴區間,對於變遷偵測準確度之影響。 |
英文摘要 | With its multi-spectral, periodic and digital characteristics, satellite images can provide immediate and accurate information for large-scaled change detection, resource investigation and management. This study used SPOT images to investigate changes of land covers during different periods. The shaded area of satellite image caused by topography may affect accuracy of informaiton. Therefore, we dismissed the shaded area first and then analyzed the information without shadow. The shadow was excluded either before or after the regressions. This study used five vegetation indices, Difference Vegetation Index, Image Ratio, Normalization Difference Vegetation Index, Transformed Vegetation Index and Ratio of Veetation Difference, to detect changes of bare areas. The linear regression was used to identify the change area and assess the accuracy of change detection affected by various confidence intervals. |
本系統中英文摘要資訊取自各篇刊載內容。