智慧型停車場的車牌辨識系統 - csie.ntnu.edu.tw

1 Recognition System of Vehicle License Plates for Intelligent Parking Lot .. z .. z . : .. z .. z .. [3] .. Discrete Fourier Transform DFT .. [2] .. Poon[1] morphology . Morphology Georges Matheron Jean Serra 1965 . closing opening . dilation erosion Dilation erosion A (local window) . structuring element(SE) B .. ilation erosion Minkowski . Dilation . D ( A, B ) = A B = I ( A + b). b B. Erosion . E ( A, B ) = A ( B ) = I ( A b). b B. B = { b | b B}. Dilation Dilation . Erosion Erosion . Dilation erosion . SE . 4-connected 8-connected , N N . 4 8. N4 N8 . Opening closing dilation erosion .. Opening . O( AB) = A o B = ( A B ) B = D( E ( AB) B ).. 1. A o B is a subset (subimage) of A.

2 2. If C is subset of D , then C o B is a subset (subimage) of D o B . 3. ( A o B) o B = ( A o B) . Closing . C ( AB) = A B = ( A B ) B = E ( D( A, B ), B ).. 1. A is a subset (subimage) of A B . 2. If C is subset of D , then C B is a subset (subimage) of D B . 3. ( A B) B = ( A B). [6] .. [2] .. (edge) .. AB-1234. AB-123. AB-123.. AB-123.. AB-123.. R G B .. Morphological closing . closing .. opening .. Morphological opening .. (templates) .. 36 26 . 10 .. [1] Poon, M. Ghadiali, G. M. T. Mao, and L. M. Sheung, A robust vision system for vehicle license plate recognition using grey-scale morphology, . Proceedings of the IEEE International Symposium on Industrial Electronics (ISIE 95), Vol.

3 1, ,1995. [2] " " . 2000 . [3] " " . 2000 . [4] " " . 2002 . [5] " " . 2005 . [6] " " 2004 . [7] Morphologie mathematigue , ~chen/course/vision/ch9/ ..pdf.