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    Please use this identifier to cite or link to this item: http://ccur.lib.ccu.edu.tw/handle/A095B0000Q/276


    Title: 三維結構光於金屬物體掃描之研究;Structured-light 3D Scanner of Metal Objects Measurement
    Authors: 黃崇霖;HUANG, CHONG-LIN
    Contributors: 機械工程系研究所
    Keywords: 結構光;三維重建;高反射率物體;Structured-light scanner;3D reconstruction;highly reflective surface
    Date: 2017
    Issue Date: 2019-07-17
    Publisher: 機械工程系研究所
    Abstract: 本研究目的在於發展出一種能對金屬等高反射率材質物體進行三維重建,ㄧ般常見的結構光掃描系統對於高反射率物體的量測容易受反光影響,造成掃描資料缺損及量測精度下降,因此本文結合曝光值補償、三維資訊處理技術與雙相機系統,希望利用改變曝光值的方法計算出亮度過低區域部分的三維資訊,再根據表面資訊的特徵將重建錯誤的資訊與雜訊刪除,達到去除反光造成的錯誤資訊、保留正確的表面資訊的效果,接著利用不同相機視角將反光造成缺失的資訊彼此補齊。根據本研究的實驗結果,本論文所提出的方法能解決結構光掃描會因為物體反光而無法重建表面資訊的問題,且有效去除因反光產生的三維雜訊點。
    As a structured-light 3D scanner can reconstruct the three-dimensional shape of an object efficiently, scanning deficiencies are commonly seen for objects with high reflective surface. Light been reflected away and reflected right into the camera will make the dynamic range of the camera exceeded and cause the failure of reconstruction. To resolve this problem, this study applied two cameras with multiple exposure times to capture the structured-light images. The noise caused by the reflectivity was also removed. The performance of the proposed system is compared with the conventional structured-light system, as well as with the reconstruction method using high-dynamic-range imaging technique. Comparisons show that the proposed system is an effective scanning method for metals with severely reflective surface.
    Appears in Collections:[機械工程學系] 學位論文

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