基于Otsu和FMM方法的风洞试验图像修复

doi:10.7527/S1000-6893.2019.23293

Abstract

Abstract: Many kinds of optics test technologies have been applied broadly in wind tunnel test, but the breakages and irrelevant information of images could affect data processing and analysis. Taking schlierern images with defects as an example, the image inpainting technology is studied. According to the characteristics of the image defects such as discrete, variable in shape and size, low gray levels of core regions and large gray gradients on the edges of defects, the image inpainting workflow is divided into pending regions determination, defects identification, and defects inpainting. The Otsu method is used to segment images in Step 1 and Step 2, and the Fast Marching Method (FMM) is applied to inpaint the defects in Step 3. After image inpainting, the defects of schlieren images are automatically identified and reduced or weakened, and the inpainting information is objective and reasonable. This image inpainting method could be extended to other optics test technologies in wind tunnel test.

Key words: image inpainting, Otsu method, fast marching method, schlieren, optics, wind tunnel test

CLC Number:

JIANG Tao, LI Qiang, CHEN Suyu, CHANG Yu, ZHANG Kouli. Image inpainting of wind tunnel test based on Otsu method and FMM[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2020, 41(2): 123293-123293.

References 27

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Image inpainting of wind tunnel test based on Otsu method and FMM

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