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the present paper introduces a new approach for the continuous measurement of the width of structural cracks within the concrete cover by image digitalizing and digital image processing methods. it is demonstrated that crack width measurement may hold reading error if an operator reads the crack widths by hand microscope or by digital microscope at locations chosen by subjective means. it is highlighted that the tortuosity of structural cracks in concrete can be mapped and described only by detailed image processing methods. keywords: concrete, crack width, digital image processing, tortuosity Réka Anna Nagy civil engineer (msc, Budapest university of technology and economics), PhD candidate at Department of construction materials and engineering Geology. main fields of interest: cracking of concrete, durability of structural materials, use of FrP reinforcements for concrete structures.

Image digitalization as a tool for processing experimental data of crack width of concrete