A motion blur compensation algorithm for 2D DIC measurements of deformable bodies

Lavatelli, Alberto; Turrisi, Simone; Zappa, Emanuele

doi:10.1088/1361-6501/aaf31a

Cited by 5 publications

(6 citation statements)

References 56 publications

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“…The advantage of this procedure over existing ones is the possibility to determine the strains of a concrete sample contact-free, as well as multiple use. Existing procedures employ, to determine the strains, by using LVDT sensors [30] or strain gages [31]. When tested with LVDT sensors [30], there is a risk of damaging them due to the sudden destruction of concrete; strain gages [31] are disposable.…”

Section: Discussion Of Results Of Studying Concrete Samples Using the Procedures Of Digital Image Correlationmentioning

confidence: 99%

“…Existing procedures employ, to determine the strains, by using LVDT sensors [30] or strain gages [31]. When tested with LVDT sensors [30], there is a risk of damaging them due to the sudden destruction of concrete; strain gages [31] are disposable. In addition, this technique does not require a specially designed expensive equipment for testing, unlike [29].…”

Section: Discussion Of Results Of Studying Concrete Samples Using the Procedures Of Digital Image Correlationmentioning

confidence: 99%

“…With the development of technology, a new technique to control deformations appeared, namely a digital image correlation procedure [30,31]. In general, the digital image correlation (DIC) method can be described as optical measurement with digital image processing and numerical calculations.…”

Section: Literature Review and Problem Statementmentioning

confidence: 99%

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Formation of a complete stress-strain curve of concrete using digital image corellation

Blikharskyy

Pavliv

2021

EEJET

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This paper reports the development and verification of a new procedure for formation of a complete stress-strain curve of concrete with a downward region of strain by using a digital image correlation method. A new technique to build spectle patterns on the surface of concrete is described. That makes it possible to accurately enough reproduce the spectle patterns on the surface of concrete and perform a high-quality analysis of strains involving digital image correlation. The advantages of this research technique have been established when predicting the formation of internal cracks in concrete followed by their propagation. In addition, using the digital image correlation methodology makes it possible to obtain strains of the entire studied plane of the sample at each stage of loading. This procedure provides an opportunity to investigate a change in strains and the movement of individual points or areas when studying concrete surfaces. That is a relevant issue as it enables more detailed diagnostics of existing reinforced concrete structures. To check the accuracy of this procedure application, a mechanical gauge with an accuracy of 0.001 mm was additionally installed. 2 high-speed monochrome CCD cameras with different lenses were used in determining concrete strains involving the digital image correlation technique. The deformations were controlled with a period of time every 250 ms. The load was controlled by an additional third camera with a speed of 50 frames/second. The result of the experimental study is the formed full concrete destruction diagram with a downward region of strain. The deviation of the results of strains based on the mechanical gauge with an accuracy of 0.001 mm with a base of 200 mm from those acquired by the digital image correlation procedure was mainly up to 10 %, which confirms the reliability of the results. The results of this work allow a more accurate calculation of reinforced concrete structures in the practice of design, inspection, or reinforcement of existing structures

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Section: Discussion Of Results Of Studying Concrete Samples Using the Procedures Of Digital Image Correlationmentioning

confidence: 99%

Section: Discussion Of Results Of Studying Concrete Samples Using the Procedures Of Digital Image Correlationmentioning

confidence: 99%

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Formation of a complete stress-strain curve of concrete using digital image corellation

Blikharskyy

Pavliv

2021

EEJET

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“…Besides this uncertainty estimation in rigid targets, accuracy analyses in deformable objects are evaluated in [ 12 ], where the effects of camera settings and motion parameters on DIC methods are investigated and validated with laser sensor measurements. In [ 13 ], there are also different methods that have been proposed to compensate for the amount of blur varying in a single frame and to consequently improve the accuracy of the optical measurements.…”

Section: Introductionmentioning

confidence: 99%

Analysis of the Accuracy Potential of a Stereo High-Speed Camera System in 3D Measurements in Highly Dynamic Experiments

Vergara

Liebold

Maas

2023

Sensors

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In the context of setting up a stereo high-speed camera system for accurate 3D measurements in highly dynamic experiments, the potential of a “Fastcam SA-X2” stereo system is evaluated by testing different camera configurations and motion scenarios. A thorough accuracy analysis is performed using spatial rigid-body transformations and relative measurement analyses of photogrammetrically reconstructed surfaces of nondeformable objects. The effects of camera calibration, exposure time, object velocity, and object surface pattern quality on the quality of adjusted 3D coordinates are taken into consideration. While the exposure time does not significantly influence the quality of the static measurements, the results of dynamic experiments demonstrate that not only an insufficient frame rate but also an increased noise level resulting from short exposure times affects 3D coordinate accuracy. Using appropriate configurations to capture dynamic events, the errors in dynamic experiments do not differ significantly from the errors obtained in static measurements. A spatial mapping error of less than 1 μm is obtained through the experiments, with proper testing configurations for an object surface area of 5×20 mm. These findings are relevant for users of high-speed stereo imaging techniques to perform geometric 3D measurements, deformation, and crack analyses.

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“…In particular, blur appears when exposure time is kept long regarding object surface displacement. Blur is proportional to magnification and exposure time [5][6][7] . In classical imaging blur free image is reached when blur is less than one pixel.…”

Section: Introductionmentioning

confidence: 99%

Critical imaging parameters in time resolved digital image correlation (TRDIC): effect of optical blur during drop test on composite structures

Boukar

Ienny

Corn

et al. 2021

Optical Measurement Systems for Industrial Inspection XII

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HAL is a multi-disciplinary open access archive for the deposit and dissemination of scientific research documents, whether they are published or not. The documents may come from teaching and research institutions in France or abroad, or from public or private research centers. L'archive ouverte pluridisciplinaire HAL, est destinée au dépôt et à la diffusion de documents scientifiques de niveau recherche, publiés ou non, émanant des établissements d'enseignement et de recherche français ou étrangers, des laboratoires publics ou privés.

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A motion blur compensation algorithm for 2D DIC measurements of deformable bodies

Cited by 5 publications

References 56 publications

Formation of a complete stress-strain curve of concrete using digital image corellation

Formation of a complete stress-strain curve of concrete using digital image corellation

Analysis of the Accuracy Potential of a Stereo High-Speed Camera System in 3D Measurements in Highly Dynamic Experiments

Critical imaging parameters in time resolved digital image correlation (TRDIC): effect of optical blur during drop test on composite structures

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