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標題: The Application of Homography in Line Laser Profilometry
作者: 李承和
Cheng-He Lee
關鍵字: Camera Calibration
line laser scanning
引用: [1]Néstor Arias, 'A hand-held 3D laser scanning with global positioning system of subvoxel precision',Journal ofPhysics:ConferenceSeries 274 (2011) [2]R. Y. Tsai, 'A Versatile Camera Calibration Technique for High-Accuracy 3D Machine Vision Metrology using off-the-shelf TV cameras and Lenses',IEEE. J. of Robotics and Automation, Vol RA-3 NO. 4, pp. 323-344, (1987). [3]Zhang.Z,'A flexible new technique for camera calibration',Technical Report MSR-TR-98-71, Microsoft Research, (1999). [4]Wei Zhenzhong,'3D coordinates measurement based on structured lightsensor'.Sensors and Actuators,A:Physical2005;120:527–35. [5]LiuB,'Measuring method for micro-diameter based on structured-light vision technology'.Chinese Optics Letters 2010;8(7):666–9. [6]Fan, 'Optimal shape error analysis of the matching image for a free-form surface', Robotics and Computer Integrated Manufacturing 17 (2001) 215-222 [7] XieZexiao, ' Study on a full field of view laser scanning system ', International Journal of Machine Tools and Manufacture 2007;47:33–43 [8]Yin-guo Huang, 'Calibration method for line-structured light multivision sensor based on combined target', EURASIP Journal on Wireless Communications and Networking 2013 2013:92. [9]Tsai, 'Calibration and analysis of eccentric error of the laser rotary-scanning measurement system', Measurement 45 (2012) 47–53 [10]Zhang, 'Novel three-dimensional data conversion technique andprofile measurement system for enginecy linder head blank', Optics &Laser Technology 45(2013)697–701
摘要: The purposeof this studydevelop a novel non-contact measurement system of three-dimensional and calibration.Line laser triangulation measurement method which architecture is line lasers, cameras, measurement.This method can utilize thetriangular geometry, through digital images to measure the objects in space coordinate information.First, we set up a camera calibration model to get the cameracoordinates and image coordinates and world coordinates betweenrelationship of coordinate conversion.Again we have to make line laser tothin and filtering, finally, we directly use the intersecting planes of measuring object planeand the line laser projection plane betweenthe digital image plane geometry translation relationship,to obtain projection relationship of the two planesbyHomography, complete a simple and efficient calibration procedures to measure the contours of three-dimensional objects.
本研究的主要目的為發展出一新型的量測三維座標的非接觸式量測系統及校正方法,該方法主要的架構是由線雷射、攝影機、量測物所構成的線雷射三角量測法,該方法可利用其三角幾何關係,透過數位影像來量測物體在空間的座標資訊。首先,我們先建立攝影機校正模型來得到影像座標與攝影機座標再到世界座標之間的轉換關係。再來我們必須對線雷射影像做細線化及濾波處理,最後,我們直接利用線雷射掃描系統的量測物平面和線雷射投影面的相交平面與數位影像平面之間的空間幾何轉換關係,使用單應性(Homography)來得到兩平面的投影關係,完成簡單且有效率的校正程序,以量測三維物體的輪廓。 本文是將校正板放置於滑軌上,讓滑軌平移,並逐步擷取影像,再從這些影像中,先抓取校正板上的特徵點與線雷射的交點,透過這些交點與已知的平移距離所形成的網格點,最後再求出單應性矩陣,以求出線雷射影像和世界座標之間的關係。
文章公開時間: 10000-01-01
Appears in Collections:機械工程學系所



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