无源毫米波成像最大似然多重网格超分辨算法

针对在无源毫米波成像中,由于天线孔径大小的限制而使获得的图像分辨率低的问题,为增强图像的分辨率,提出了一种针对无源毫米波成像应用的最大似然多重网格超分辨算法。该算法以Lucy-Richardson算法为基础,通过逐步频域内插避免了频谱混叠,从而实现频谱外推和超分辨。实验结果表明,该算法改善了收敛速度,减少了计算量,有利于无源毫米波成像超分辨的实时实现。

Maximum likelihood multigrid super-resolution algorithm for passive millimeter wave imaging

The problem of poor resolution of acquired images in the passive millimeter wave imaging stems mainly from antenna size limitations.In order to achieve resolution improvements,a maximum likelihood multigrid super-resolution algorithm based on Lucy-Richardson algorithm for passive millimeter-wave imaging is proposed,which implements spectrum extrapolation gradually by applying the interpolation method of frequence domain and thus enhances image resolution for passive millimeter wave imaging.Experimental results demonstrate the algorithm improves the convergent rate and is computationally much more efficient than Lucy-Richardson algorithm and is easily implemented in real time for passive millimeter wave imaging.