Zairyo-to-Kankyo
Online ISSN : 1881-9664
Print ISSN : 0917-0480
Three Dimensional Shape Characterization of Corroded Surface by Stereo Image Processing Technique
Masahiro YamamotoAtsushi NogamiKotaro Yoshida
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1994 Volume 43 Issue 3 Pages 147-152

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Abstract

Stereo image processing technique has been applied to measure a three dimensional shape of corroded surface. Stereo photographs were taken at the front of view and the inclined view of a sample. The three dimensional height was calculated from the difference in position of an image between two photographs and the inclination angle. A newly developed algorithm was applied for correcting a distortion of inclined image. Mutual correlation coefficient methed was applied to calculate the corresponding points. The depth precision of this method is about 0.1mm, when photographic amplification is 2 and resolution of image scanner is 400dpi. Results from this method agree with the data measured by point micrometers. This method doesn't require any special measuring tools but a camera, and can be used as non-destructive and non-contact tests.

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© Japan Society of Corrosion Engineering
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