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    YANG Ping, JIANG YingTian, HONG ZhenPeng, ZHANG JianCheng, ZHANG JianZhu. The Defect Image Processing by Canny Operator for Digital Radiography in Frequency Dominant[J]. Nondestructive Testing, 2008, 30(7): 422-425.
    Citation: YANG Ping, JIANG YingTian, HONG ZhenPeng, ZHANG JianCheng, ZHANG JianZhu. The Defect Image Processing by Canny Operator for Digital Radiography in Frequency Dominant[J]. Nondestructive Testing, 2008, 30(7): 422-425.
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    The Defect Image Processing by Canny Operator for Digital Radiography in Frequency Dominant

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    • Received Date: June 21, 2007
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    • Using the Canny operator to process the frequencydomain enhancement image by Matlab was presented. The processing results were optimized in dual threshold way by hysteretic threshold to improve the visibility. It was proved that the Canny edge detector processing could effectively detect the edge of the classical defects in digital radiography image. It was validated that the visibility could be improved greatly.
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      • References (4)
    • [1]
      John Canny. A computational approach to edge detection[J]. IEEE Trans Pattern Analysis and Machine Intelligence,1986,PAMI8(1):679-697.
      [2]
      Kenneth R Castleman.数字图像处理技术[M].北京：电子工业出版社,1998.
      [3]
      王新成.高级图像处理技术[M].北京：中国科学技术出版社,2001.
      [4]
      孙兆林. MATLAB 6 X图像处理[M].北京：清华大学出版社,2002.
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