Please use this identifier to cite or link to this item: https://ah.nccu.edu.tw/handle/140.119/106930


Title: 魚眼鏡頭變形校正之研究
The study of fisheye lens distortion correction
Authors: 張晏碩
Chang, Yen Shuo
Contributors: 甯方璽
張晏碩
Chang, Yen Shuo
Keywords: 魚眼鏡頭
變形校正
克利金法
樣條函數法
Date: 2017
Issue Date: 2017-03-01 17:24:02 (UTC+8)
Abstract: 魚眼鏡頭具有短焦距、寬視角特性,使其在各領域上的應用愈趨廣泛,但伴隨產生極大的桶狀變形失真,使其在醫學影像上的判識、物件偵測與全景影像的產製上皆造成一定程度上的困難。

本研究針對魚眼鏡頭的桶狀變形校正進行探討,以CanonEOS 5D相機機身搭配Sigma 15mm f/2.8魚眼鏡頭(以下簡稱:魚眼鏡頭)進行校正板的取像,並使用自行設計程式建立一較具穩健性的魚眼鏡頭影像處理方式,使影像上的校正板控制點位資訊能穩定擷取來提升影像校正之精度。接著使用樣條函數法與克利金法兩大類型(總計九種方法)內插法建立魚眼鏡頭的鏡頭變形模型並使用雙線性內插法進行影像還原。成果分析顯示線性模式克利金法在校正魚眼鏡頭上,比起其他內插法推估的模型來的精確。經線性克利金法模型校正後影像平均偏移值為35.368(pixels),最高可校正誤差量達85.98%。

因此在本研究中使用線性函數模式克利金法建製魚眼鏡頭的變形模型,能有效改正影像的桶狀變形。而校正後魚眼影像可改善免費全景製作軟體Microsoft ICE在變形影像上無法產製的限制性與提升全景影像產製效率。
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Description: 碩士
國立政治大學
地政學系
103257031
Source URI: http://thesis.lib.nccu.edu.tw/record/#G0103257031
Data Type: thesis
Appears in Collections:[地政學系] 學位論文

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