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diagnostic parameters. The developed methods include image pre-processing,
localization of objects of interest, segmentation, quantitative parameter estimation. It
is necessary to highlight the localization of welds and determining the size of welding
defects on a complex-structured background, analysis of corrosion damage on images
of painted surfaces of arbitrary color, modeling and analysis of laser reinforcement of
aluminum alloy with silicon carbide particles, evaluation of porosity of metal coatings,
improving the accuracy of tracking motion in electron beam welding, analysis of
fractographic images of fractures of heat-resistant steels.
A structure-adaptive method of segmentation of weld zones of different shapes
on radiographic images has been developed. Due to the introduction of new
informative features of defects in the welding area of the oil and gas pipes, a method
of defect segmentation was constructed, which increased the probability of correct
classification of spherical pores and slags. A method for calculating the depth of defects
based on their radiographic images has been developed and the relative errors in
calculation the width and depth of defects have been experimentally established.
On the basis of a cylindrical color model and a single-scale retinex, a method of
structure-adaptive segmentation of corrosion damage on images of painted surfaces of
arbitrary color obtained under non uniform illumination was developed.
Modelling for different volume concentrations of particles in the surface layer
of aluminum alloy based on uniform distribution was performed. This made it possible
to compare experimental and simulated images of surface layers cross-section to
determine the volume concentration of silicon carbide particles and further prediction
the mechanical properties of such surfaces.
A method of structure-adaptive localization and segmentation of pores on
surface images of oxide ceramic coatings has been developed, which uses the
verification of the pore background area, which provides the possibility of calculating

the degree of porosity of the coating.

Key words: image segmentation, non-destructive testing, digital radiography,
corrosion of structures.