基于PSF的太赫兹图像分辨率增强算法
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中国科学技术大学

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The THz image resolution enhancement algorithm based on PSF
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University of Science and Technology of China

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    摘要:

    近年来,太赫兹成像技术在多个领域具有广阔的应用。一套完整的太赫兹成像系统的数学模型是非常有必要的。基于点扩散函数的太赫兹图像增强模型是很好的选择。该方法将目标函数与点扩散函数进行褶积,实现了太赫兹图像的模拟传输。然后根据光学成像的过程,计算成像系统的点扩散函数。最后,基于点扩散函数对图像进行反褶积增强。该模型用于探测图像增强的结果表明,该方法有效地提高了图像的分辨率。恢复的映像包含更多细节。

    Abstract:

    In recent years, terahertz (THz) imaging technology has received increased attention owing to the promising imaging tools now available for nondestructive testing. However, theoretical models of THz imaging systems are yet to be developed. In this study, we proposed a comprehensive mathematical modeling and simulation theory for the THz imaging system. Gaussian beam distribution was used in the mathematical modeling of the point spread function (PSF). The target function was convolved using the PSF, and the analog transmission of THz images was realized. The PSF of the imaging system was calculated using the optical imaging method. Next, the image was deconvolution-enhanced using the PSF. The image restoration results revealed that the image resolution improved. The restored image contains more details.

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  • 收稿日期:2022-06-27
  • 最后修改日期:2022-11-14
  • 录用日期:2022-11-15
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