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Use of an intensity threshold to improve the visibility of ghost images produced by incoherent light

机译：使用强度阈值来改善由非相干光产生的重影图像的可见性

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摘要

In thermal light ghost imaging, the transparent mask, located in the object arm of the optical setup, isnumerically reconstructed by correlating the speckle patterns acquired by the video camera with the output of a bucket detector placed behind the mask. We show that the visibility of images can be significantly improved by discarding every speckle pattern whose bucket output falls below a certain threshold. We also demonstrate that the efficiency of the conventional method strongly decreases when the speckle statistics deviate from the negative exponential, whereas the threshold method is more robust against changes in the statistical distribution of the speckle intensity. We also provide reasonable statistical explanations for these results.
机译：在热鬼影成像中，通过将摄像机获取的散斑图样与放置在掩模后面的桶形检测器的输出相关联，以数字方式重建位于光学设备物镜臂中的透明掩模。我们表明，通过丢弃桶输出低于某个阈值的每个散斑图样，可以显着改善图像的可见性。我们还证明，当斑点统计偏离负指数时，传统方法的效率会大大降低，而阈值方法对于斑点强度统计分布的变化则更加鲁棒。我们还为这些结果提供了合理的统计解释。

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