Anna Guillaume, Goudail Françcois, Dolfi Daniel
Laboratoire Charles Fabry, UMR 8501, Institut d'Optique, CNRS, University Paris Sud 11, Palaiseau, France.
J Opt Soc Am A Opt Image Sci Vis. 2012 Jun 1;29(6):892-900. doi: 10.1364/JOSAA.29.000892.
In active polarization imaging, one frequently needs to be insensitive to noninformative spatial intensity fluctuations. We investigate a way of solving this issue with general state contrast (GSC) imaging. It consists in acquiring two scalar polarimetric images with optimized illumination and analysis polarization states, then forming a ratio. We propose a method for maximizing the discrimination ability between a target and a background in GSC images by determining the optimal illumination and analysis states. A further advantage of this approach is to provide an objective way of quantifying the performance improvement obtained by increasing the number of degrees of freedom of a GSC imager. The efficiency of this approach is demonstrated on simulated and real-world images.
在主动偏振成像中，人们常常需要对无信息的空间强度波动不敏感。我们研究了一种用通用状态对比度（GSC）成像解决此问题的方法。它包括获取两幅具有优化照明和分析偏振态的标量偏振图像，然后形成一个比值。我们提出了一种通过确定最佳照明和分析状态来最大化GSC图像中目标与背景之间辨别能力的方法。这种方法的另一个优点是提供了一种客观的方式来量化通过增加GSC成像仪的自由度数量所获得的性能提升。该方法的有效性在模拟图像和真实图像上得到了验证。
