Self-calibration for lensless color microscopy

Abstract : Lensless color microscopy (also called in-line digital color holography) is a recent quantitative 3D imaging method used in several areas including biomedical imaging and microfluidics. By targetting cost effective and compact designs, the wavelength of the low-end sources used is only imprecisely known, in particular because of their temperature and power supply voltage dependence. This imprecision is the source of biases during the reconstruction step. An additional source of error is the crosstalk phenomenon, i.e., the mixture in color sensors of signals originating from different color channels. We propose to use a parametric inverse problem approach to achieve the self-calibration of a digital color holographic setup. This process provides an estimation of the central wavelengths and of the crosstalk. We show that taking the crosstalk phenomenon into account in the reconstruction step improves its accuracy.
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Submitted on : Monday, August 28, 2017 - 12:46:48 PM
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Olivier Flasseur, Corinne Fournier, Nicolas Verrier, Loïc Denis, Frédéric Jolivet, et al.. Self-calibration for lensless color microscopy. Applied optics, Optical Society of America, 2017, 56 (13), ⟨10.1364/AO.56.00F189⟩. ⟨ujm-01577888⟩

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