整合結構光投影和高動態範圍技術應用於全自動化車燈殼三維形貌量測系統

Fully automatic 3D surface measurement of car lamp housing by using integration of structured light projection and high dynamic range techniques

王振于(Cheng-Yu Wang)

指導教授 ： 陳冠辰

共同指導教授 ： 劉承揚(Cheng-Yang Liu)

淡江大學/工學院/機械與機電工程學系碩士班/碩士(2019年)

https://doi.org/10.6846/TKU.2019.00024

摘要

論文中文摘要內容：
結構光投影技術被廣泛應用於光學檢測上，當待測物有很高的反射係數，捕捉的影像會產生錯誤的光強度信息導致大量的雜訊及誤差，利用二維圖像處理高動態範圍(High Dynamic Range,HDR)技術可有效抑制影像過曝及暗噪產生的錯誤，影像在不同動態範圍中會有不同的亮暗對比特性，利用高動態範圍整合技術可有效優化光學量測中常見的反光雜訊，本篇論文整合結構光投影技術及高動態範圍影像處理技術於車燈殼三維形貌輪廓，搭配簡易機構設計以實現全自動化量測系統的建置，系統軟體技術包括七步相位移法、路徑獨立之相位展開技術、高動態範圍影像處理、二值化處理和線性回歸參考扣除面等技術，在相同待測物量測下，本篇論文開發的量測系統量測速度可到達每次量測3.83秒，量測範圍從26x26 mm的硬幣到620x180 mm的車燈殼都能量測，而市面上量測系統的量測速度則需14.3秒，且量測範圍只有200x150 mm，本套全自動化結構光量測系統在速度、精確度及量測範圍都有更佳的提升。

關鍵字

三維量測 ； 高動態範圍技術 ； 全自動化結構光量測 ； 反光

並列摘要

Abstract:
In this thesis, the structured light projection and high dynamic range processing technique are used to reconstruct the 3D geometry of car lamp housing. The optical measurement system with HDR technique can effectively avoid the common error caused by reflection. This study builds the fully automatic structured light measurement system including the techniques of seven-step phase-shifting, path-dependent phase unwrapping, HDR image processing, and linear regression reference plane deduction method. The experiment results are compared with the commercial system to verify the advantage of our measurement system. Under the same conditions, the measurement speed of the commercial system takes 14.3 seconds and the measurement range is 200x150 mm. Our system can measure with a speed of 3.83 seconds per measurement and the measurement range is 26x26 mm to 620x180 mm. According to the compared results, our fully automated measurement system can improve the 3D profile and has fast speed, accuracy, and provide a wide measurement range.

並列關鍵字

Three-dimensional surface measurement ； High dynamic range technique ； Fully automatic structure light measurement ； Reflectivity

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