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序列图像的POCS超分辨率重建方法

Keywords: 超分辨率,POCS(凸集投影)算法,点扩散函数(PSF),运动估计,Gibbs现象

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Abstract:

为了有效地执行超分辨率算法,使其改善高分辨率图像的边缘质量,根据POCS算法的原理,给出了模拟-修正迭代超分辨率图像重建方法和具体实现步骤.针对重建的高分辨率图像中产生的边缘Gibbs现象,提出了一种抑制方法,该方法将中心在边缘像素的PSF与一个指数型权值函数相乘,使得修改的PSF系数沿着边缘正交的方向减小.利用模拟序列和实际序列对改进的POCS算法的有效性进行了验证.结果表明:该方法简单易行,能有效地保持边缘的特性,达到提高图像质量的目的.

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