In this paper we present a novel method for automatically and efficiently generating stereoscopic mosaics by seamless registration of optical data collected by a video camera mounted on an airborne platform that undergoes dominant translational motion. There are four critical points discussed in this paper: 1) Using a parallel-perspective representation, a pair of geometrically registered stere...

PURPOSE To develop standard microscopic hexagonal mosaics mimicking the human corneal endothelium for quality control of endothelial cell density (ECD) measurement and verification of cell counting strategy by light microscopy in eye banks using organ culture. METHODS A standard slide, the Keratotest, was developed with 10 laser-engraved mosaics and different predetermined "cell" densities re...

Mosaics are orbits of partitions arising from music theoretical investigations. Various theorems from the field of “enumeration under finite group actions” are applied for enumerating mosaics. In other words, it is demonstrated how to enumerate G-orbits of partitions of given size, block-type or stabilizer-type.

This paper proposes a novel strategy to find the best reference homography in mosaics from video sequences. The reference homography globally minimizes the distortions induced on each image frame by the mosaic homography itself. This method is designed for planar mosaics on which a bad choice of the first reference image frame can lead to severe distortions after concatenating several successiv...

László Fejes Tóth’s fascinating book [2] demonstrates in many ways the phenomenon that figures of discrete or convex geometry that are very economical, namely solving an extremal problem of isoperimetric type, often show a high degree of symmetry. Among the examples are also planar mosaics where, for instance, an extremal property leads to the hexagonal pattern. Mosaics, or tessellations, have ...

The analysis of genetic mosaics, in which an animal carries populations of cells with differing genotypes, is a powerful tool for understanding developmental and cell biology. In 1990, we set out to improve the methods used to make genetic mosaics in Drosophila by taking advantage of recently developed approaches for genome engineering. These efforts led to the work described in our 1993 Develo...

This paper draws attention to the formal parallelism that exists between chromosomal-loss mosaicism and mutagenically induced mosaicism in Drosophila and suggests that, although the underlying processes by which these two types of genetic mosaics are generated are very different, the more refined methodology employed in developmental analyses of genetically induced chromosomal-loss mosaics may ...

The objective of this analysis was to identify topographic and bioclimatic factors that predict occurrence of forest and grassland patches within tropical montane forest-grassland mosaics. We further investigated whether interactions between topography and bioclimate are important in determining vegetation pattern, and assessed the role of spatial scale in determining the relative importance of...