Title:	DATA INTERPOLATION BASED ON CONTEXTUAL ANALYSIS FOR GENERATING TOMOGRAPHIC IMAGES IN CONCRETE SPECIMEN
Author(s):	Roger Manuel Quispe Urure , Marco Antonio Garcia de Carvalho, Marinara Andrade Nascimento Moura and Gisleiva Cristina dos Santos Ferreira
ISBN:	978-989-8704-21-4
Editors:	Yingcai Xiao, Ajith P. Abraham and Jörg Roth
Year:	2020
Edition:	Single
Keywords:	Concrete, Data interpolation, Ultrasonic Tomography, Thresholding
Type:	Full
First Page:	55
Last Page:	62
Language:	English
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Paper Abstract:	In the Construction area, inspections of concrete structure could be carried out using non-destructive tests, such as ultrasonic tomography. Usually, images generated by this technique are improved by means of spatial interpolation data. This research proposes the use of a new spatial interpolation technique in order to generating tomographic images of concrete. This approach was originally used on wood tomographic images and is based on contextual analysis according to the location of the point to be interpolated. Also, it is considered the influence zone of each route obtained in the concrete ultrasonic test. The ultrasonic tests were performed in cylindrical specimens with and without PVC tubes, simulating voids in concrete. The achieved result of our analysis are compared to the ground truth images and those obtained by Inverse Distance Weighting, using accuracy metric and image processing operations. The results indicated high accuracy values (greater than 90%), i.e, the spatial interpolation technique (method) is promising in identifying the presence of voids in concrete elements.
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