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- The Mark-Based Approaches for Motion Estimation from 3-D Point Sets
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題名 | The Mark-Based Approaches for Motion Estimation from 3-D Point Sets=利用標誌法估測三維物體之運動參數 |
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作者 | 陳清發; 周文修; 陳永昌; | 書刊名 | 高苑學報 |
卷期 | 5:1 1996.02[民85.02] |
頁次 | 頁7-17 |
分類號 | 312.1 |
關鍵詞 | 標誌法; 三維物體; 運動參數; Motion estimation; Rotation matrix; Translation vector; |
語文 | 英文(English) |
中文摘要 | 三維物體之運動估測是電腦視覺的主要應用之一。本篇論文將提出以標誌法來估 測三維物體之運動參數。首先,需決定在兩不同時刻,四個梯形頂點座標的對應關係,而此 對應關係可由梯形標誌之幾何特性輕易得到。其次,我們將提出二種新的方法來估測三維物 體之運動參數,即間接法與直接法。間接法係以攝影機之外在參數為基礎發展出來的,而直 接法則是以最小平方法及 SVD 等數學技巧來求得三維物體之運動參數。 最後並將二種新方 法,推廣到三維超音波探頭的定位問題上。由實驗結果可知,用電腦視覺的方法來解決三維 超音波探頭的定位問題,是很有可能實現的。 |
英文摘要 | The estimation of the 3-D motion of a moving object from a sequence of images is of prime interest in computer vision. It is useful in many applications, such as scence analysis, path planning, and trajectory prediction. Two sets of feature points on a rigid object at two time instants can be used respondences between two point sets are established first and them the motion parameters are estimated by solving equations which are governed by the corresponding points at these two time instants. However, the establishing of point correspondences is not trivial. In this paper, the point correspondences will be found through the technique of image processing for a trapezoid mark. Moreover, we will propose two mark-based approaches to estimate the 3-D motion parameter. Also in this paper, we will propsoe that our methods for estimating 3-D motion parameters be applied to a new, computer-vision based method for the 3-D registration of 2-D echocar-diography. Basically, we expect that this method will replace the hand-held probe-holder mechanism in applications where visual seeing-eye tools are used to observe the spatial location of the ultrasound probe relative to a fixed external reference point or to observe the relative motion of the probe moving between two different locations. |
本系統之摘要資訊系依該期刊論文摘要之資訊為主。