Fiji is a distribution of the popular open-source software ImageJ focused on biological-image analysis. Fiji uses modern software engineering practices to combine powerful software libraries with a broad range of scripting languages to enable rapid prototyping of image-processing algorithms. Fiji facilitates the transformation of new algorithms into ImageJ plugins that can be shared with end users through an integrated update system. We propose Fiji as a platform for productive collaboration between computer science and biology research communities.
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We thank W. Rasband for developing ImageJ and helping thousands of scientists, those who contributed to the Fiji movement by financing and organizing the hackathons, namely G.M. Rubin for hackathons at Janelia Farm, I. Baines for hackathons at Max Planck Institute of Molecular Cell Biology and Genetics in Dresden, R. Douglas for a hackathon at Institute of Neuroinformatics in Zurich, F. Peri and K. Miura for the hackathon at European Molecular Biology Laboratory, and International Neuroinformatics Coordinating Facility for Fiji image-processing school, W. Pereanu for the confocal image of the larval fly brain, M. Sarov for the confocal scan of C. elegans larva, the scientists who released their code under open-source licenses and made the Fiji project possible. We want to thank Carl Zeiss Microimaging for access to the SPIM demonstrator. K.E. and C.R. were supported by US National Institutes of Health grant RC2GM092519. J.S. and P.T. were funded by Human Frontier Science Program Young Investigator grant RGY0083. P.T. was supported by The European Research Council Community′s Seventh Framework Programme (FP7/2007-2013) grant agreement 260746.
Visualization of Fiji development. The video, produced using 'gource' tool in Git, visualizes the changes to Fiji source code repository from 15 March 2009 to 16 May 2009. The class hierarchy is visualized as a dynamic tree, the developers are flying pawns that extend rays to classes that they newly created or into which they introduced changes. Between 23 March and 3 April 2009 there was a Fiji hackathon in Dresden, Germany, marked by increased developer activity that carries over the period after the hackathon ended, the 'hackathon effect'.
Visualization of SIFT-mediated stitching of large ssTEM mosaics. The ventral nerve cord of Drosophila first instar larva was sectioned and imaged in electron microscope as a series of overlapping image tiles. The video visualizes the process of reconstruction of such large section series on seven exemplary sections. The corresponding SIFT features that connect images within section and across section are shown as green dots, the residual error of their displacement at a given iteration of the global optimizer is shown as cyan line (iteration number and minimal, average and maximal error are shown in lower left corner). The global optimization proceeds section by section and at each step distributes the registration error equally across the increasing set of tiles. To emphasize the visualization effect all tiles within section are initially placed at the same location discarding their known configuration within section.
Visualization of bead-based registration of multiview microscopy scan of Drosophila embryo. Drosophila embryo expressing His-YFP marker has been imaged in a spinning disc confocal microscope from 18 different angles improvising rotation using custom made sample chamber. The video visualizes the global optimization that is using local geometric bead descriptor matches to recover the shape of the embryo specimen. The bead descriptors (representing constellations of sub-resolution fluorescent beads added to the rigid agarose medium in which the embryo was mounted) are colored according to their displacement at each iteration of the optimizer (red, maximum displacement; green, minimum displacement). The nuclei of the embryo specimen are shown in grey. The displacement at each iteration averaged across all descriptors is shown in the lower left corner.
Segmentation and tracking of nuclei in Drosophila embryo. Cellular blastoderm stage Drosophila embryo expressing His-YFP marker in all cells was imaged from five angles using SPIM throughout gastrulation. The video shows a result of segmentation and tracking algorithm that follows the movements of cells through the gastrulation process. The nuclei are colored according to the angle at which they were detected.