title: Seamless stitching of tile scan microscope images.
abstract: For diagnostic purposes, optical imaging techniques need to obtain high-resolution images of extended biological specimens in reasonable time. The field of view of an objective lens, however, is often smaller than the sample size. To image the whole sample, laser scanning microscopes acquire tile scans that are stitched into larger mosaics. The appearance of such image mosaics is affected by visible edge artefacts that arise from various optical aberrations which manifest in grey level jumps across tile boundaries. In this contribution, a technique for stitching tiles into a seamless mosaic is presented. The stitching algorithm operates by equilibrating neighbouring edges and forcing the brightness at corners to a common value. The corrected image mosaics appear to be free from stitching artefacts and are, therefore, suited for further image analysis procedures. The contribution presents a novel method to seamlessly stitch tiles captured by a laser scanning microscope into a large mosaic. The motivation for the work is the failure of currently existing methods for stitching nonlinear, multimodal images captured by our microscopic setups. Our method eliminates the visible edge artefacts that appear between neighbouring tiles by taking into account the overall illumination differences among tiles in such mosaics. The algorithm first corrects the nonuniform brightness that exists within each of the tiles. It then compensates for grey level differences across tile boundaries by equilibrating neighbouring edges and forcing the brightness at the corners to a common value. After these artefacts have been removed further image analysis procedures can be applied on the microscopic images. Even though the solution presented here is tailored for the aforementioned specific case, it could be easily adapted to other contexts where image tiles are assembled into mosaics such as in astronomical or satellite photos.
authors: Leibniz Institute of Photonic Technology (IPHT) Jena e.V, Jena, Germany.|Institute of Physical Chemistry and Abbe Center of Photonics, Friedrich-Schiller University Jena, Helmholtzweg, Jena, Germany.
authors: F B
authors: FB
authors: Legesse
authors: Leibniz Institute of Photonic Technology (IPHT) Jena e.V, Jena, Germany.|Institute of Physical Chemistry and Abbe Center of Photonics, Friedrich-Schiller University Jena, Helmholtzweg, Jena, Germany.
authors: O
authors: O
authors: Chernavskaia
authors: Institute of Physical Chemistry and Abbe Center of Photonics, Friedrich-Schiller University Jena, Helmholtzweg, Jena, Germany.
authors: S
authors: S
authors: Heuke
authors: Leibniz Institute of Photonic Technology (IPHT) Jena e.V, Jena, Germany.|Institute of Physical Chemistry and Abbe Center of Photonics, Friedrich-Schiller University Jena, Helmholtzweg, Jena, Germany.
authors: T
authors: T
authors: Bocklitz
authors: Leibniz Institute of Photonic Technology (IPHT) Jena e.V, Jena, Germany.
authors: T
authors: T
authors: Meyer
authors: Leibniz Institute of Photonic Technology (IPHT) Jena e.V, Jena, Germany.|Institute of Physical Chemistry and Abbe Center of Photonics, Friedrich-Schiller University Jena, Helmholtzweg, Jena, Germany.
authors: J
authors: J
authors: Popp
authors: Leibniz Institute of Photonic Technology (IPHT) Jena e.V, Jena, Germany.|Institute of Physical Chemistry and Abbe Center of Photonics, Friedrich-Schiller University Jena, Helmholtzweg, Jena, Germany.|King's College London, Randall Division of Cell and Molecular Biophysics, NHH, Guy's Campus, London SE1 1UL, U.K.
authors: R
authors: R
authors: Heintzmann
mesh_terms: D000465:Algorithms; D016477:Artifacts; D007091:Image Processing, Computer-Assisted / Q000379:methods; D018613:Microscopy, Confocal / Q000379:methods*; D061848:Optical Imaging
keywords: Image blending; image compositing; image stitching