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27 results for “Reflectance Transforming Imaging”
Data from: Reinvestigation of Protelytron permianum (Insecta; Early Permian; USA) as an example for applying reflectance transformation imaging to insect imprint fossils
We reinvestigated the holotype of Protelytron permianum, one of the earliest putative stem-dermapteran (i.e. stem-earwig). We recurred to reflectance transformation imaging (RTI) to deliver exhaustive and interactive photographic data. We were able to ascertain the occurrence of broadenings located along veins of the hind wing vannus and forming an arc, as well as a series of radiating folds, alternatively concave and convex. Such an organization is diagnostic of Dermaptera, in which it is indicative of hind wing folding mechanisms, particularly elaborated in these insects. We provide a foldable, paper model of the hind wing. Based on the case presented herein we anticipate that RTI process will be a major upheaval in the documentation of fossil insects preserved as imprints.
Data from: Reinvestigation of the type specimen of Ginkgophyllum grasseti Saporta 1875 using Reflectance Transforming Imaging
<p>Reflectance Transforming Imaging (RTI) produces photographs in which the angle of the light can be changed at will, allowing to investigate remotely minute details of the 3D structure of sub-planar objects. Here we apply this technique to the type specimen of <i>Gingkophyllum grasseti</i>, a vegetative shoot with putative ginkgophyte affinities from the early Permian of Lodève (France). <i>Gingkophyllum grasseti</i>, the type species of the corresponding genus, was originally described by Saporta in 1875 and has never been illustrated other than by drawings representing only portions of the shoot. Using RTI, we describe and illustrate the specimen and discuss some key features, such as the arrangement of the leaves on the shoot or the presence of abundant secretory structures. Through a historical account, we show how the lack of illustration led to confusions about the morphology of <i>Ginkgophyllum </i>and we discuss the importance of reinvestigating type specimens of Paleozoic ginkgophyte taxa in order to clarify their taxonomy and better understand their evolutionary history. The sharing of RTI files is one example of approaches that can be further developed to improve remote access to specimens.</p>
Data from: Reinvestigation of Protelytron permianum (Insecta; Early Permian; USA) as an example for applying reflectance transformation imaging to insect imprint fossils
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Data from: Reinvestigation of the type specimen of Ginkgophyllum grasseti Saporta 1875 using Reflectance Transforming Imaging
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Data from: The systematic position of the stonefly †culonga Sinitshenkova, 2011 (Plecoptera: Leuctrida) reassessed using Reflectance Transforming Imaging and cladistic analysis
The phylogenetic position of the insect species †culonga Sinitshenkova, 2011, recovered from the Khasurty locality (Transbaikalia, Russia; Early Cretaceous), is re-investigated. This fossil needle stonefly has been considered an Exeleuctrida nec Mioleuctrida & Eleuctrida based on the organization of the hind wing venation opposite the arculus. We reconsidered this interpretation based on a direct observation, complemented by a Reflectance Transforming Imaging file. Our investigation indicates that the species displays the defining character state of Eleuctrida while it lacks the defining character state of Mioleuctrida. Due to inconsistencies in the character state combination displayed by the species, we carried out a cladistics analysis. The species †culonga is recovered as an Eleuctrida nec Mioleuctrida, and therefore represents a suitable calibration point for a node more recent than previously assumed, and incidentally demonstrates that Mioleuctrida belongs to Eleuctrida.
Data from: The systematic position of the stonefly †culonga Sinitshenkova, 2011 (Plecoptera: Leuctrida) reassessed using Reflectance Transforming Imaging and cladistic analysis
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Video: Integrating Multispectral Imaging, Reflectance Transformation Imaging (RTI), and Photogrammetry for Archaeological Objects
<p>Video of talk presented remotely at the session "Illumination of Material Culture Symposium II" at Digital Heritage 2018 on October, 26, 2018. A method for combining multiple forms of imagery, including RTI and Multispectral Imaging, with 3D models is summarized and illustrated by still images and animation.</p>
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OpenNeuro
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