Improved gray-color transform method for MFL images

PENG Lisha; WANG Shen; LIU Huan; HUANG Songling; ZHAO Wei

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Journal of Tsinghua University(Science and Technology) ›› 2015, Vol. 55 ›› Issue (5) : 592-596.

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Improved gray-color transform method for MFL images

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Abstract

Magnetic flux leakage (MFL) systems using pseudocolor images give better identification than grayscale images. This study combines two traditional pseudocolor coding methods into an improved gray-color transform method. Firstly, the initial transform piecewise linear expression is determined from the magnetic flux leakage characteristics. Then, the Ostu method for grey value clustering is used to get the expression node values. The transformed pseudocolor images are then obtained using the improved expression. This method based on the actual gray value to get the specific expression has good adaptability. Real tests show that this method gives clearer, more vivid images, which give better MFL characteristics identification.

Key words

magnetic flux leakage image / pseudocolor image / gray-color transform method / Otsu method

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PENG Lisha, WANG Shen, LIU Huan, HUANG Songling, ZHAO Wei. Improved gray-color transform method for MFL images[J]. Journal of Tsinghua University(Science and Technology). 2015, 55(5): 592-596

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