Estimation and compensation of motion blur for the reduction of uncertainty in DIC measurements of flexible bodies

Zappa, Emanuele; Turrisi, Simone; Lavatelli, Alberto

doi:10.1088/1742-6596/1149/1/012009

Cited by 3 publications

(3 citation statements)

References 20 publications

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“…The algorithm adopted to estimate the noise-to-signal ratio for Wiener deconvolution is the same discussed in [51], and is based on the processing of a sequence of static images of the target. The working principle of the algorithm is displayed in figure 10 and can be explained as follows.…”

Section: Nsr Definitionmentioning

confidence: 99%

“…Therefore, the deconvolution problem has to be solved at subset level, where blur intensity and direction remains almost constant. In [51], the authors have demonstrated that the choice of subset size deeply influences the performance of motion blur estimation technique. Good estimation results were obtained only when the subset size exceeded 70 × 70 px.…”

Section: Validation On Synthetic Imagesmentioning

confidence: 99%

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

Lavatelli

Turrisi

Zappa

2018

Meas. Sci. Technol.

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Digital image correlation (DIC) is a widely adopted optical technique to detect motions and deformations dealing with vision-based systems. Considering DIC dynamic applications, motion blur represents one of the most relevant sources of measurement uncertainty. This paper proposes an innovative approach to compensate the effect of motion blur on images coming from deformable bodies, where the amount of blur (w) varies within the single frame. A subset-based technique is developed to estimate and then remove motion blur for each image region. The algorithm is validated both on synthetic images and experimental data, demonstrating its effectiveness at improving the accuracy of the displacements measured by DIC.

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Section: Nsr Definitionmentioning

confidence: 99%

Section: Validation On Synthetic Imagesmentioning

confidence: 99%

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

Lavatelli

Turrisi

Zappa

2018

Meas. Sci. Technol.

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“…While to eliminate the problem of refraction of light rays in the paper [3] solutions were given using the X-ray acquisition method and the vacuum chamber acquisition method. In the papers [4], [5], solutions to the problem of photo blur due to the movement of the recorded scene or acquisition device are given, and in the paper [6] an estimate of the error caused by moving the acquisition device is proposed. The stabilization of the acquisition floating robot on waves is researched in the paper [7], a new solution to the problem of cumulative errors and noises generated by a general gyro sensor has been proposed.…”

Section: Introductionmentioning

confidence: 99%

Analysis of the problems of acquisition of digital photographs intended to determine the required dimensional accuracy of the product

Turinski

Svalina

Šarić

et al. 2023

J. Phys.: Conf. Ser.

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In this paper, some of the problems arising from the acquisition of digital photography intended to determine the dimensional accuracy of products are discussed. Different equipment (digital cameras, lenses, and lighting) was used when acquiring photos in different formats. In mechanical engineering, the tolerances of dimensional measurements of products range from a few microns to 100 microns. Based on that, the technical specifications and capabilities of the cameras and lenses used are analyzed. In addition to the sensor, the resolution of the photo is often limited by the lens. Prior to the acquisition of photographs, problems such as lighting, contrast, sharpness, and the problem of central projection are addressed. During acquisition, technical specifications of the lens such as focal length, minimum focusing distance, aperture, and other lens features that cause acquisition problems are considered. This research and analysis led to valuable insights and conclusions that will facilitate the preparation of the acquisition of digital photography to determine the dimensional accuracy of the product.

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Omnidirectional Panoramic Video System With Frame-by-Frame Ultrafast Viewpoint Control

Dong

Shimasaki

et al. 2022

IEEE Robot. Autom. Lett.

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Estimation and compensation of motion blur for the reduction of uncertainty in DIC measurements of flexible bodies

Cited by 3 publications

References 20 publications

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

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

Analysis of the problems of acquisition of digital photographs intended to determine the required dimensional accuracy of the product

Omnidirectional Panoramic Video System With Frame-by-Frame Ultrafast Viewpoint Control

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