一种离焦模糊图像的盲复原方法

针对离焦模糊图像提出了一种基于图像阶跃边缘扩散特性的盲复原方法。该方法通过改进Grubbs异常值检测准则,对图像中的阶跃或近似阶跃边缘进行定位。通过自适应选取最佳图像区域的方法计算线扩散函数,进一步利用离焦模糊半径与线扩散函数之间的关系,计算出离焦模糊参数。根据参数得到点扩散函数,最终对离焦模糊图像进行复原。实验结果表明,该方法的复原效果较好,具有一定的应用价值。

Limits on rough-particle sizing with low-defocus interferometric imaging

We present a rigorous theoretical model for the influence of the aperture in interferometric out-of-focus imaging. We investigate the role of this effect on the properties of speckle-like patterns generated by irregular, rough particles. Finally, we determine the conditions under which these patterns are no longer representative of particle size but of the aperture itself and the defocus parameter.