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Image Processing Technology in the Characterization of Surface Features of the Corrosion of Steel

Author: YinWenBo
Tutor: XuShanHua
School: Xi'an University of Architecture and Technology
Course: Structural Engineering
Keywords: Corrosion of Steel Image Processing Color features Histogram Texture Fractal dimension
CLC: TP391.41
Type: Master's thesis
Year: 2011
Downloads: 26
Quote: 0
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Abstract


With economic development, China’s comprehensive national strength, steel is widely applied in civil engineering. But many long-term in the ocean air, industrial air and other corrosive environment of the large steel structure projects (such as bridges, large industrial building, tower, high-voltage tower, a large reservoir gate, offshore oil facilities, etc.) appeared in corrosion problems. Which leads to some problems to solve related scientific problems, in particular, need to "corrosion and section loss of steel surface characteristics of laws ","corrosion steel materials, components and structure of the force characteristics","bearing steel corrosion Performance evaluation methods "such as the formation of innovation and breakthroughs.Thesis, atmospheric conditions, acid and salt air corrosion specimens to study the steel specimens were accelerated corrosion test for six months and is based on the corrosion of ordinary digital cameras capture images through a series of image processing technology, a corrosion image Characteristics and corrosion rate relationshipArticle by corrosion image color and texture features two aspects of the surface of steel specimens were characterized by corrosion.The article which by threshold processing of image color histogram before and after degusting of corrosion specimens, and count the gray mean value and value of gray range.Study found that rust corrosion before and after the peak width of the image histogram and the corrosion rate of linear correlation, through the corrosion peak width of the image histogram can be well reflected the degree of corrosion test specimens This rust in order to better extract the texture features of the specimen, the specimen in the image on the rust on the basis of a series of enhancements, based on fractal theory to calculate the surface fractal dimension of three-dimensional. Study found that rust fractal dimension and its non-linear relationship between the corrosion rates, the fractal dimension increases as the corrosion rate decreases, rust corrosion specimen image texture features can describe Corrosion characteristics.

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CLC: > Industrial Technology > Automation technology,computer technology > Computing technology,computer technology > Computer applications > Information processing (information processing) > Pattern Recognition and devices > Image recognition device
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