The removal of interference for isoclinic image in photoelasticity analysis

• Main Authors: Shih-Yun Lin, 林仕昀
• Other Authors: Hsien-Huang Wu Hsieh
• Format: Others
• Language: zh-TW
• Published: 2013
• Online Access: http://ndltd.ncl.edu.tw/handle/40448764555402945134

碩士 === 國立雲林科技大學 === 電機工程系碩士班 === 101 === This paper aims to study and prove Asundi papers Medium-ray image is a residual dumping isochromatics interference, and then solve photoelastic isocline image interference. From the perspective of the field of image processing nonlinear camera response function in the importance of the photoelastic image, try using the method of HDRI. This thesis uses photoelastic phase shift method, obtained through the phase displacement method isocline principal stress direction angle, in addition, further through phase unwrapping method, to resolve the case wrapped on isocline images and Asundi results do more careful analysis and comparison of these methods prove the feasibility and accuracy. In this study, the photoelastic material PSM-1 force for two experiments, the use of internal stress caused by birefringent effect, as should force measurement analysis. Using digital image processing method, and then from the photoelastic image map to get more information. Capture high-resolution imaging equipment, including cameras and CCD cameras do measurement analysis, and as cameras and CCD camera to capture images may cause the problem of insufficient dynamic range, making this the use of high dynamic range image method. High Dynamic Range Imaging provides digital images more wide dynamic range, accurate reproduction of the real scene where the light intensity distribution. Therefore rectifiable more precise isocline principal stress direction angle, locate isocline residual image isochromatics images due to camera dynamic range caused by the impact of insufficient results. After correction using HDRI image in photoelastic isocline direction angle, improving isochromatics interference and noise caused by phase unwrapping problem and compared with Asundi papers and proof reaction function in the digital photoelastic study on the correctness improvement has significant influence.