2012 | OriginalPaper | Chapter
Online Blind Calibration of Non-uniform Photodetectors: Application to Endomicroscopy
Authors : Nicolas Savoire, Barbara André, Tom Vercauteren
Published in: Medical Image Computing and Computer-Assisted Intervention – MICCAI 2012
Publisher: Springer Berlin Heidelberg
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We present an original method for the online blind calibration of non-uniform photodetectors. The disparity of the detectors may arise from both irregular spatial arrangement and distinct slowly time-varying photometric transfer functions. As natural images are mostly continuous, the signal
collected
by neighboring detectors is strongly correlated over time. The core idea of our method is to translate the calibration problem into relative pairwise calibrations between neighboring detectors followed by the regularized inversion of a system akin to gradient-based surface recovery. From our blind calibration procedure, we design an
online
blind calibration pipeline compatible with clinical practice.
Online
blind
calibration is proved to be statistically better than standard
offline
calibration for reconstructing endomicroscopy sequences.