Full Stokes polarimetric images can be obtained from two acquisitions with a microgrid polarization camera equipped with a retarder. When the retardance is imperfectly known, it can be calibrated from the measurements, but this requires three image acquisitions and may cause divergence of estimation variance at a low signal-to-noise ratio. We determine closed-form equations allowing one to decide in which experimental conditions autocalibration is possible and useful, and to quantify the performance gain obtained in practice. These results are validated by real-world experiments.

中文翻译：

---

基于微网的完整Stokes成像仪的延迟自动校准何时可行和有用？

可以使用配备了缓速器的微栅格偏振相机从两次采集中获得全斯托克斯偏振图像。当延迟不完全已知时，可以从测量中对其进行校准，但这需要进行三个图像采集，并且可能在低信噪比的情况下导致估计方差的差异。我们确定封闭形式的方程式，使人们可以决定在哪些实验条件下进行自动校准是可行和有用的，并量化在实践中获得的性能增益。这些结果已通过实际实验验证。