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研究生:蔡文
研究生(外文):Wen Tsai
論文名稱:中值濾波結合趨勢判斷應用於降低影像處理過程中邊緣失真現象之研究
論文名稱(外文):The Median Filter Combining with Trend Diction for Edge-Preserving Noise Reduction in Image Processing
指導教授:錢志回
指導教授(外文):Chien, Chi-Hui
學位類別:碩士
校院名稱:國立中山大學
系所名稱:機械與機電工程學系研究所
學門:工程學門
學類:機械工程學類
論文種類:學術論文
論文出版年:2004
畢業學年度:92
語文別:中文
論文頁數:70
中文關鍵詞:影像處理趨勢判斷濾波
外文關鍵詞:image processingtrend dictionfilter
相關次數:
  • 被引用被引用:6
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  • 下載下載:54
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一般的光學干涉術通常都會獲得干涉條紋圖像,然而這些圖像往往都會摻有雜訊,造成分析時的不便。中值濾波是以選取區域範圍內的訊息做小至大的排序,然後取其中間值取代範圍中心值的處理方式,所以此方式能夠找出選取區域的中心傾向,且較不會受到少數特異雜訊點的影響。因此,經常可看到中值濾波會被應用在許多光學圖像的影像處理中。
雖然中值濾波能有效濾除高頻雜訊,可是若在選取範圍較大,會出現將峰端訊息平滑化的錯誤傾向。所以許多爲考量不同訊號特性的改良方式便因應而生;其改良方式有以不同的權重搭配或不同的選取範圍大小做探討等等,然而其目的都是為了能更加精確的獲得真正的訊息。基於上述的觀點,本論文將於處理過程中,運用最小平方差的觀念在二維的干涉圖像,藉此找尋此面域的趨勢,然後避免不必要訊息考量,以達到更精準的處理效果。
由於要更明顯觀看出其改良效果的差異性,本論文也也檢視了兩組由相移斑點干涉術得到之干涉圖形,結果顯示本文所提方法對平滑化現象之改良效果較其他傳統方法為佳。
In most of the optical interferometry techniques, one often get interferometric fringe patterns which include noises, and these noises will cause analysis difficulty. The method of median filter is used to sort the data in the region, and use median value to replace the center value of the region. Therefore, the median filter technique can find central tendency of the region, and less affected by the presence of a minority of aberrant value. So the median filter technique is used frequently in image processing of many optical fringe patterns
The median filter technique is effective in removing noise with high frequency, but tends to smooth out details such as summits if the window size is large. So there are many improved methods developed corresponding to different properties of signal. Even though each of the improved methods has different considerations, such as to consider different integer weights, or different window size etc., their purposes are all the same, that is to make results more accurately. On the basis of these viewpoints, this thesis will use concept of least–squares fitting on 2-D interferometric fringe patterns. By finding the trend of the region, and avoid unnecessary signal consideration, make the results more accurately.
In order to study the effect of the proposed technique, two sets of fringe patterns obtained from the phase-shifting speckle interferometry will be used as examples. They showed that the proposed technique presents a better result than traditional technique.
目錄

謝誌……………………………………………. ……………………….I
論文摘要…………………………………………… ………………….II
目錄…………………………………………………………………….IV
圖目錄………………………………………………………………….VI
表目錄…………………………………………………………………. X
符號說明……………………………………………………………….XI

第一章 緒論……………………………………………………………1
1-1 前言…………………………………………………………….1
1-2 文獻回顧……………………………………………………….3
1-3 本文架構……………………………………………………….8

第二章 基礎原理與濾波技術…...…………………………………...9
2-1 條紋成像原理……………………………………………….…9
2-2 相移與相位重建原理………………………………………...11
2-2-1 相移法基本概念………………………………………...11
2-2-2 四影像法原理…………………………………………...12
2-2-3 相位展開法基本概念…………………………………...14
2-2-4 相位展開技術…………………………………………...16
2-3 雜訊濾除技術………………………………………………...18
2-3-1 相位展開前濾波技術概述……………………………...18
2-3-2 最小平方差濾波………………………………………...19
2-3-3 可適應中值濾波………………………………………...24
2-3-4 於濾波加入趨勢判斷考量……………………………...28

第三章 程式模擬架構………………………………………………32

第四章 數值模擬與分析……………………………………………33
4-1 影像模擬說明………………………………………………...33
4-2 濾波效果比較………………………………………………...38
4-2-1 可適應中值濾波與最小平方差濾波應用效果………...38
4-2-2 標準正方形中值濾波與改良濾波應用效果…………...43
4-2-3 標準正方形中值濾波與改良濾波應用效果…………...61

第五章 結論與展望…………………………………………………65

參考文獻………………………………………………………………..67
[1]Gabor, D., Microscopy by Reconstructed Wave-Fronts, Proc. Roy. Soc. A197, pp.454-487, 1949
[2]Gabor, D., Microscopy by Reconstructed Wave-Fronts II, Proc. Roy. Soc. B64, pp.449-469, 1951
[3]Gabor, D., Holography, 1948-1970, Proc. IEEE, Vol.60, pp.655-668, 1972
[4]Burch, J. M. and Tokarski, J. M. J., Production of Multiple Beam Fringes from Photographic Scatters, Optica Acta, Vol.15(2), pp.101-111, 1968
[5]Leendertz, J. A., Interferometic Displacement Measurement on Scattering Surfaces Utilizing Speckle Effect, Journal of physics:Scientific Instruments, Vol.3, pp.214-218, 1970
[6]Morimoto, Y. and Hayshi, T., Deformation Measurement During Power Compaction by Scanning Moiré Method, Experimental mechanics, Vol.24(2), pp.112-116, 1984
[7]Butters, J. N. Leendertz, J. A., a Double Exposure Technique for Speckle Pattern Interferometry, Journal of physics:Scientific Instruments, Vol.4, pp.277-279, 1971
[8]Pitas, I. and Venetsanopoulos A. N., Order Statistics in Digital Image Processing, Proc. IEEE, Vol.80, pp.1893-1921, 1992
[9]Balan, P. and Mather, P. M., an Adaptive Filter for Removal of Noise in Interferometrically Derived Digital Elevation Models, IEEE 2001 International , Vol.6, pp.2529-2531, 2001
[10]Sirkis, J. S., Chen, Y.-M., Singh, H. and Cheng, A. Y., Computerized Optical Figure Pattern Analysis in Photomechanics : a Review, Optical Engineering, Vol.31, pp.304-314, 1992
[11]Alves, P. S. L., Arruda, J. R. F., Gaul, L. and Hurlebaus, S., Power Flow Estimation Using Pulse ESPI, Proceedings of SPIE - The International Society for Optical Engineering, pp.362-373, 2000
[12]Hu, J. and Hu, X., Application of Median Filter to Speckle Suppression in Intravascular Ultrasound Images, Proceedings of the Australian and New Zealand Conference on Intelligent Information Systems, pp.302-306, 1994
[13]Czerwinski, R. N., Jones, D. L., and O''Brien, W. D. Jr., Ultrasound Speckle Reduction by Directional Median Filtering, IEEE International Conference on Image Processing, Urbanna, Illinois, Vol.1, pp.358-361, 1995
[14]Lin, H.-M. and Willson, A. N., Median Filters with Adaptive Length, Circuits and Systems, IEEE Transactions on , Vol.35, pp.675-690, 1988
[15]Prasad, M. K. and Lee, Y. H., Weighted Median Filters : Generation and Properties, Circuits and Systems, IEEE International Symposium on , Amherst, Vol.1, pp.425-428, 1989
[16]Ko, S.-J. and Lee, Y. H., Center Weighted Median Filters and Their Applications to Image Enhancement, Circuits and Systems, IEEE Transactions on , Vol.38, pp.984-993, 1991
[17]Lin, Y., Ruilang, Y., Gabbouj, M. and Neuvo, Y., Weighted Median Filters : a Tutorial, Circuits and Systems II: Analog and Digital Signal Processing, IEEE Transactions on, Vol.43 , pp.157-192, 1996
[18]Bing, Z., Convergence Properties of Median and Weighted Median Filters, Signal Processing, IEEE Transactions on, Vol.42, pp.3515-3518, 1994
[19]Nakadate, S., Yatagai, T. and Saito, H., Electronic Speckle Pattern Interferometry Using Digital Image Processing Techniques, Applied Optics, Vol.19, pp. 1879-1883, 1979
[20]Robinson, D., Automatic Figure Analysis with a Computer Image-Processing System, Applied Optics, Vol.22, pp. 2169-2176, 1983
[21]Creath, K., Phase-Shifting Speckle Interferometry, Applied Optics, Vol.18, pp.3053-3058, 1985
[22]Roddier, C. and Roddier, F., Interfergram Analysis Using Fourier Transform Techniques, Applied Optics, Vol.26, pp. 1668-1673, 1987
[23]Makivirta, A. and Koski, E., Haemodynamic Trend Detection Using The Median Filter, IEEE International Conference on Systems Engineering, Kobe, Japan, pp.9-11, 1992
[24]Davila, A., Kerr, D. and Kaufmann, G. H., Fast Electro-Optical System for Pulsed ESPI Carrier Fringe Generation, Optics Communications, Vol.123, pp.457-464, 1996
[25]Capanni, A., Pezzati, L., Bertani, D., Certica, M. and Francini, F., Phase-Shifting Speckle Interferometry: a Noise Reduction Filter for Phase Unwrapping, Optical Engineering, Vol.36, pp.2466-2472, 1997
[26]Qian, F., Wang, X., Wang, X. and Bu, Y., Adaptive Filter for Unwrapping Noisy Phase Image in Phase-Stepping Interferometry, Optics and Laser Technology,Vol.33, pp.479-486, 2001
[27]葉奕銘,相位移數位剪像之相位展開法研究,碩士論文,國立成功大學機械工程研究所,台南,2001
[28]Rastogi, P. K., Digital Speckle Pattern Interferometry and Related Techniques, New York, pp.134-145.2001
[29]Hong, C. K., Ryu, H. S. and Lim, H. C., Least-Squares Fitting of the Phase Map Obtained in Phase-Shifting Electric Speckle Pattern Interferometry, Optics Letters, Vol. 20, No. 8, pp.931-933, 1995
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