基於多點色彩追蹤使用動態標記之擴增實境系統

Use Dynamic Markers for an Augmented Reality System Based on Multi-Point Color Tracking

謝曜安(Yaw-An Hsieh)

指導教授 ： 陳湘鳳

國立臺灣大學/工學院/機械工程學研究所/碩士(2014年)

https://doi.org/10.6342/NTU.2014.10806

摘要

擴增實境(Augmented Reality, AR)是基於現實的環境，將虛擬物件的資訊添加至其中，使其在視覺上如同處於同一空間的技術。本研究目的為建立一套動態標記之擴增實境系統。研究方法利用各種顏色之圓形標記，建立標記之HSV色彩模型閥值處理，以演算法在平面上進行橢圓偵測並多點追蹤。將取得之橢圓中心位置作為特徵點，藉由特徵點在影像之座標位置與世界座標位置資訊，來建立虛擬物件之空間轉換關係。以此轉換關係建立動態標記，使其可以動態移動。並以標記之凸邊形環狀序列進行系統化編碼，使其單組標記可對應多個虛擬物件。在已知標記所在初始世界座標位置，基於色彩模型進行橢圓追蹤，取得至少四個以上的特徵點位置資訊，計算空間轉換關係之單應性矩陣。以此演算方法建立之擴增實境系統可處理部分遮蔽問題，同時可快速切換多種虛擬物件。在未來供使用者進行互動時，本研究所設計之擴增實境座標系統不會因虛擬物件更改而有所變動，是一個相當具有互動性的動態座標擴增實境。

關鍵字

擴增實境 ； 動態標記 ； 遮蔽 ； 顏色追蹤

並列摘要

Augmented Reality is a technology combining virtual objects with real scenes captured from cameras, so that virtual objects and real scenes are in the same space. The goal of this thesis is to create a dynamic marker augmented reality method.
The method uses circular markers with multiple colors to set up a HSV space model to extract target color features, and develops an algorithm to detect the ellipse for multi-point tracking in the scenes. By dealing with the positions of the centers of the circular markers, the method can calculate the camera pose parameters and provide the transformation relation between virtual objects and the real world. Using the transformation relation, the method creates a dynamic marker system that can move positions when at least four markers are fixed. With the initialized markers, the algorithm can handle occlusion problems and change virtual objects easily and quickly by calculating the convex order of the markers. In addition, this method can provide users a fixed coordinate system, which will not be moved with the markers. Therefore, the dynamic augmented reality system provides users a very interactive platform to interact with virtual objects.

並列關鍵字

augmented reality ； dynamic markers ； occlusion ； color tracking

參考文獻

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