隨著航測技術的不斷提升，對於整合不同時期航空影像上資訊的需求日漸增加。因此數位影像間幾何位置套疊關係之建立在其應用上成為不可或缺的資料前處理步驟。
本研究將特徵匹配的機制應用於影像間關係之求定，希望能提升自動化之完整性。以影像上的邊緣線段為特徵，以「線段」整體而非線特徵上逐個像元來尋找對應關係，先利用幾何上可以代表此線段的資訊（長度、方向、位置等）選出初始可能匹配的線段，再利用線段間的特徵值以Cost Function作相似性評估函數來比對，求得本匹配方式中最理想的線段對應人選，期望增加結果的可靠程度，且提供兩影像間對應線段的資訊給使用者作為後續套疊關係應用的出發點，例如：變遷偵測。
在選用七組數位航空影像進行實驗後，以人工方式檢核本實驗匹配的成果，經過統計後，約有百分之六十以上的匹配線段符合作為兩個時期影像上求取對應關係的良好控制物的需求。這樣的線段對應關係提供後續研究可靠的資訊。

The more the technology of photogrammetry keep progressing , the more the information integration of aerial images at different period is required . Therefore , it is necessary to establish the correspondence between digital images by geometric overlapping relationships as a pre-processing of the application .
In this research , based on feature-based matching , the correspondence between images is determined to increase the automation degress . After extracting edges as matching entities , instead of each pixel of line features , the correspondence is established by applying the whole segments . First of all , the initial probable matched segments are selected by geometric information of these segments , for example , the length , direction and position of segments . And then , in order to raise the reliability of the result , a similarity measure as a cost function is applied to calculate the relation between feature value of segments . Sequentially , the most suitable segment candidates are determined by the proposed approach . Finally , the information of corresponding segments between two images at different period is supplied to users for the start of continuing overlapping application such like change detection .
Tests are done using seven pairs of aerial images and then the results are checksed manually . There are , statistically , about more than 60% of matched segments conforming to the requirement of establishing the correspondence between images at different periods . Moreover , such segments provide reliable information to the follow-up research .

林文勇，民國84年，關連式匹配之研究，成功大學測量工程研究所，台南。

邱式鴻、王蜀嘉，民國85年。Förstner特徵物萃取法精確性的探討，第十五屆測量學術及應用研討會，國立政治大學，台北。

胡征懷，民國81年。以區塊匹配法自動產生DEM並協助地表變遷偵測，成功大學航空測量研究所，台南。

張維哲，民國87年。數值影像中新增道路擷取之研究，成功大學測量工程研究所，台南。

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