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ISSN 0474-8662. Information Extraction and Processing. 2018. Issue 46 (122)
Analysis of dimple shape on fractographic heat-resistant steel images
Ivasenko I. B.
Karpenko Physico-Mechanical Institute of the NAS of Ukraine, Lviv
Berehulyak O. R.
Karpenko Physico-Mechanical Institute of the NAS of Ukraine, Lviv
Vorobel R. A.
Karpenko Physico-Mechanical Institute of the NAS of Ukraine, Lviv
https://doi.org/10.15407/vidbir2018.46.034
Keywords: degradation of steels, quantitative fractographic features, image segmentation,
retinex, dimples
Cite as: Ivasenko I. B., Berehulyak O. R., Vorobel R. A. Analysis of dimple shape on
fractographic heat-resistant steel images. Information Extraction and Processing. 2018, 46(122), 34-37. DOI:https://doi.org/10.15407/vidbir2018.46.034
Abstract
The problem of image analysis of the fracture surfaces, which are formed by scanning electron microscope, is considered. This image is characterized by nonuniform illumination of the surface. That’s why it needs preprocessing. To do this, a retinex transformation is applied. For further localization and analysis of the dimples on the digital image of the fracture special technology was developed. It includes Otsu segmentation of equalized image, image skeletonization, removal of small objects, calculation of size and orientation distributions of recognized dimples. Due to this, the contours of the dimples are more fully distinguished as characteristic elements of the viscous relief of the destruction of heat-resistant steels and their quantitative estimates are obtained.
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