高動態範圍監控系統之研究;Study of Surveillance System with High Spatial Dynamic Range

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题名:	高動態範圍監控系統之研究;Study of Surveillance System with High Spatial Dynamic Range
作者:	倪薇雯;Ni, Wei-Wen
贡献者:	光電科學與工程學系
关键词:	監控系統;分光鏡;高空間動態;廣角端;望遠端
日期:	2018-08-21
上传时间:	2018-08-31 11:55:33 (UTC+8)
出版者:	國立中央大學
摘要:	摘要　市面上普遍的閉路電視並不具備同時監控廣角影像與望遠之影像的功能，然而，在本高空間動態範圍監控系統中導入了分光鏡，致使入射光可以同時為廣角相機與望遠相機所使用，透過此種特性，可以將寬廣的監測範圍皆用光學變焦的方式做局部放大，使得各區域的影像都能清晰呈現，不同於傳統監控系統僅使用數位放大。系統定義上，首先，先探討分光鏡的尺寸與廣角相機的關係，再者，由於需要對每個廣角區域進行放大，故分光鏡之擺動角度之於待觀測點的數學模型建立也是不可或缺的，以至於擷取到之影像融合以及修正皆會針對此系統的進行討論，並藉由實驗的驗證，確認系統的可行性。 ;Abstract Commercially available closed circuit television (CCTV) are generally not compatible of monitoring a wide-angle scene and enlarging a range of clear image in the same time. However, in order to let the incident light be made use of both wide-angle camera and telephoto camera, the surveillance system with high spatial dynamic range apply beam splitter (B.S.) to resolve this issue. By utilizing the feature of this system, the extensive monitoring image can be magnified in term of optical zoom in comparison to ordinary CCTV system which employed digital zooming technique. Therefore, each amplified picture is emerged sharpness. To determine the system, this dissertation define the relation between the size of beam splitter and wide-angle camera in the first place. Secondly, for the purpose of scanning every segment of the wide-angle image, establishing a mathematical model among the rotational angle of B.S. and observation area is indispensable. With the aim of combining both wide-angle part and telephoto section, merging as well as revising of captured images for this specific setup will also be discussed in this paper. Via experiment, the feasibility of this surveillance system with high spatial dynamic range can be well-verified.
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