High-Temperature Digital Image Correlation Method Based on Optical Band-Pass Filtering Imaging

Bing, 潘兵 Pan; Dafang, 吴大方 Wu

doi:10.3788/aos201131.0212001

Cited by 2 publications

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“…Fractal dimension is applied to image mathing,the basic idea [7,8]: we select an interested subarea S in the reference image before changing, then a subarea T which is the same size and shape of the S is selected discretionarily in the image after changing. The subarea S is decomposed into n subprime subareas ( 1, 2, , )…”

Section: Sub-pixel Image Matching Based On the Fractal Dimension 21 P...mentioning

confidence: 99%

Sub-Pixel Image Matching Based on the Fractal Dimension

Luo

Jiang

Zhang

2013

KEM

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The technology of image matching is very important in the field of image analysis. Studying on image correlation is the key to improve the accuracy of image matching, while the fractal self-similarity has the unique potential in making full use of image correlation. This paper put forwards a matching algorithm of the sub-pixel image matching based on fractal dimension. Firstly, by searching template subarea based on traverse in being matched image, and the sub-subareas are classified. Then, the fractal dimension of subareas and sub-subareas is calculated by using the optimal box counting method. The similarity maximum position can be found according to the statistical correlation. Finally, fractal interpolation method is used to improve the precision of image matching. Both theoretical analysis and experimental results show that this approach has good matching effect.

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Section: Sub-pixel Image Matching Based On the Fractal Dimension 21 P...mentioning

confidence: 99%

Sub-Pixel Image Matching Based on the Fractal Dimension

Luo

Jiang

Zhang

2013

KEM

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“…Failure typically occurs in traditional electrical and optical measurement methods for measuring material strain due to high-temperature environments in 2009. Pan [6] measured the thermal deformation and expansion coefficients of chromiumnickel austenitic stainless steel in the temperature range of 16.5 • C-1000 • C using blue light active illumination and filtering. Guo [7] designed an optical filtering system to achieve the acquisition of clear images of carbon fiber specimens at a maximum temperature of 2600 • C. In addition to blue light illumination, researchers have also used short-wavelength ultraviolet light as the illumination source to provide an effective method for mechanical measurements of materials in ultrahigh-temperature environments.…”

Section: Introductionmentioning

confidence: 99%

Thermal radiation elimination method for high-temperature digital image correlation using polarization camera

Wang

Zhang

et al. 2021

Meas. Sci. Technol.

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Digital image correlation (DIC) is a material displacement and strain measurement technology based on visible light illumination. At high temperatures, the problem of thermal radiation seriously affects the quality of acquired images and restricts the development of high-temperature DIC technology which is increasingly applied in the field of high-temperature measurement due to stringent measurement temperature requirements. A thermal radiation elimination method based on the use of a polarization camera for high-temperature DIC measurements is proposed in this study. This method uses a polarization camera combined with a filter set to achieve clear image acquisition at 1200 °C and effectively eliminates the effects of thermal radiation on image acquisition. The gray average method and an image inverse filtering algorithm are adopted in this study to eliminate high-temperature thermal disturbances. Finally, a high-temperature DIC measurement system is independently designed, and a rigid-body displacement experiment is carried out on an FV566 steel specimen to obtain time–displacement curves. A set of uniaxial tensile tests is also performed on FV566 steel material to explore its strain field at 1200 °C.

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High-Temperature Digital Image Correlation Method Based on Optical Band-Pass Filtering Imaging

Cited by 2 publications

References 0 publications

Sub-Pixel Image Matching Based on the Fractal Dimension

Sub-Pixel Image Matching Based on the Fractal Dimension

Thermal radiation elimination method for high-temperature digital image correlation using polarization camera

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