Application of Autofocus Algorithm in Millimeter-Wave Narrowband Holographic 3D Imaging
2023 IEEE International Symposium on Antennas and Propagation and USNC-URSI Radio Science Meeting (USNC-URSI)(2023)
摘要
A single-frequency millimeter-wave imaging system can only acquire two-dimensional information of the target. Moreover, during the imaging process, the position of the reference plane needs to be adjusted in real time according to the distance from the target to the scanning array to maintain high-quality focusing effect. Therefore, in this paper, a single-frequency millimeter wave imaging autofocus algorithm is proposed by using the amplitude value of the inversion image as the basis for evaluating the image focus. The method can realize automatic focusing of narrow-band holographic imaging, and at the same time, for distributed targets in practical application scenarios, the method of multi-focus image fusion of slices is used to realize all-focus inversion imaging of multiple targets. Finally, simulation experiments verify the effectiveness of the method.
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关键词
all-focus inversion imaging,distributed targets,millimeter-wave narrowband holographic 3D imaging,multifocus image fusion,narrow-band holographic imaging,single-frequency millimeter wave imaging autofocus algorithm,single-frequency millimeter-wave imaging system
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