10 May 2011 Advanced image composition with intra-frame drift correction
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Although drift-corrected image acquisition (DCIC) reduces the drift-related blur and distortions significantly, frames may still be slightly suffer from these distortions. When the SCPM frames are taken quickly and frequently, it is possible to compensate for the drift-related displacements of the frame pixels. However, in order to be able to use this technique, it is necessary to find all dead times, e.a. times between acquisitions of two neighboring pixels, lines and frames, when no signal is measured. Dead times can be discovered using variable-frequency modulated light source. Analysis of frames altered by the modulated light of multiple frequencies provides all information needed for calculation of all dead times.
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Petr Cizmar, András E. Vladár, Michael T. Postek, "Advanced image composition with intra-frame drift correction", Proc. SPIE 8036, Scanning Microscopies 2011: Advanced Microscopy Technologies for Defense, Homeland Security, Forensic, Life, Environmental, and Industrial Sciences, 80360D (10 May 2011); doi: 10.1117/12.887183; https://doi.org/10.1117/12.887183

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