# 臺灣博碩士論文加值系統

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 本論文提出一個X光檢測印刷電路板上金線的方法。檢測金線是否有相交及其彎曲程度。在本論文中，對檢測用的X光影像，使用數學形態學中的closing來進行處理，並計算出與其原圖之差值後，對其二值化，可得印刷電路板上的金線圖。最後在對金線圖以A*演算法做追蹤並檢測，即可得到金線是否有缺陷。
 A method of Printed Circuit Board (PCB) gold wire inspection is proposed in this thesis. We inspect the gold wire intersection on PCB and the wire sweep. In this thesis, we use closing operation in mathematical morphology, to deal with the X-ray image, and calculate the difference between result and original image. After applying thresholding to it, we can get the printed circuit board golden wire image. Finally, we track the image with A* search algorithm to get the golden wire information.
 誌謝 i中文摘要 iiABSTRACT iiiCONTENTS ivLIST OF FIGURES viLIST OF TABLES xivChapter 1 Introduction 11.1 Wire Segmentation 11.2 Wire Sweep Tracking 21.3 Thesis Organization 3Chapter 2 Related Works 42.1 Edge Detection 42.1.1 Canny Edge Detection 52.1.2 Laplacian Edge Detection 62.2 Search Algorithm 72.2.1 Iterative Deepening Depth-First Search 72.2.2 Flood-Fill Algorithm 9Chapter 3 Background 113.1 Mathematical Morphology 113.2 A* Search Algorithms 15Chapter 4 Methodology 184.1 Overview 184.2 Unsharp Masking 20Chapter 5 Experimental Result 23Chapter 6 Conclusion and Future Work 44References 46
 R. M. Haralick and L. G. Shapiro, Computer and Robot Vision, Addison-Wesley, Reading, MA, Vol. 1, pp. 157-261, 1992.M. J. Carlotto, “Enhancement of Low-Contrast Curvilinear Features in Imagery,” IEEE Transactions on Image Processing, Vol. 16, No. 1, pp. 221-228, 2007.D. Kunz and B. Schweiger, “Line Detection in Strongly Noise-Corrupted Images,” Proceedings des Workshops Algorithmen-Systeme-Anwendungen, Heidelberg, pp. 50-54, 2005.P. Lester, “A* Pathfinding for Beginners,” http://www.policyalmanac.org/games/aStarTutorial.htm, 2005.T. Lindeberg, “Edge Detection and Ridge Detection with Automatic Scale Selection,” Proceedings of IEEE Computer Society Conference on Computer Vision and Pattern Recognition, San Francisco, CA, pp. 465 – 470, 1996.OpenCV, “Laplace Operator,”http://docs.opencv.org/doc/tutorials/imgproc/imgtrans/laplace_operator/laplace_operator.html, 2015.P. Perona and J. Malik, “Scale-Space and Edge Detection Using Anisotropic Diffusion,” IEEE Transactions on Pattern Analysis and Machine Intelligence, Vol. 12, No. 7, pp. 629-639, 1990.Wikipedia, “A* Search Algorithm,”http://en.wikipedia.org/wiki/A*_search_algorithm, 2015.Wikipedia, “Canny Edge Detector,”http://en.wikipedia.org/wiki/Canny_edge_detector, 2015.Wikipedia, “Chebyshev Distance,”http://en.wikipedia.org/wiki/Chebyshev_distance, 2015.Wikipedia,“EdgeDetection,”http://en.wikipedia.org/wiki/Edge_detection, 2015.Wikipedia, “Euclidean Distance,”http://en.wikipedia.org/wiki/Euclidean_distance, 2015.Wikipedia,“Flood Fill,”http://en.wikipedia.org/wiki/Flood_fill, 2015.Wikipedia, “Iterative DeepeningDepth-First Search,”http://en.wikipedia.org/wiki/Iterative_deepening_depth-first_search, 2015.Wikipedia, “Laplace Operator,”http://en.wikipedia.org/wiki/Laplace_operator, 2015.Wikipedia, “Taxicab Geometry,”http://en.wikipedia.org/wiki/Taxicab_geometry, 2015.Wikipedia, “Unsharp Masking,”http://en.wikipedia.org/wiki/Unsharp_masking, 2015.
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