基于二维单点频柱面成像算法的相位失配问题研究

Research on phase mismatch problem based on 2D single-point frequency cylindrical imaging algorithm

二维单频柱面成像系统由于受聚焦深度的影响,无法对体目标所有散射点进行准确相位补偿。为了解决有限聚焦深度的问题,提出一种基于图像融合的聚焦增强算法。利用不同补偿柱面的成像结果进行融合处理,最终获得聚焦图像。通过与原始图像比较,结果表明,所提出的方案有效解决了聚焦深度有限造成散射点补偿相位失配而引起的失焦问题。

Due to the influence of the depth of focus, two-dimensional single frequency cylindrical surface imaging systems cannot accurately compensate all the scattering points of the body target. In order to solve the problem of the limited depth of focus, a focus enhancement algorithm based on image fusion is proposed. Using the fusion processing of the imaging results of different cylinders, the focused image is finally obtained. It can be seen from the comparison with the original image that the proposed method effectively solves the out-of-focus problem caused by the compensation of the phase mismatch due to the limited depth of focus.