Gigapixel macro photography of tree rings
2021-04-16
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2020-04-15
2020-04-15
2020-04-15
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2020-04-15
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Gigapixel macro photography of tree rings
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2021-04-16
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Abstract
High quality specimen digitization is becoming standard across the sciences, is relevant for curation of natural history collections, and must become a priority for dendrochronology. Here, ultra-high resolution images of tree-ring specimens are presented. Our gigapixel images of polished specimens have proven effective for digital analyses, archiving, and education, and we believe macro photography may prove a lower cost and more broadly accessible digitization alternative to microtomy and X-rays. We advocate for gigapixel macro photography as one accessible and adaptable paradigm to elevate reflected light imaging standards in dendrochronology.
Description
Two ultra-high resolution images of tree rings are available as TIFF files. Tree-ring specimens are Pseudotsuga macrocarpa from California and Quercus macrocarpa from Minnesota sampled in June 2016 and March 2019, respectively. These gigapixel macro photographs were created using a professional-grade camera body, the GigaMacro imaging system, and computational post-processing. Image comparison from a flatbed scanner and the GigaMacro system are shown (Figure 1), and visual aids illustrate the mechanics of gigapixel macro photography (Figure 2). Specific questions about these tree-ring images and about access to additional materials may be addressed to Daniel Griffin (griffin9@umn.edu).
Referenced by
Griffin, D., Porter, S. T., Trumper, M.L., Carlson, K.E., Crawford, D.J., Schwalen, D., and McFadden, C.H., Gigapixel macrophotography of tree rings, revised manuscript submitted to Tree-Ring Research, April 2021.
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National Science Foundation Division of Environmental Biology, Award: 1655144
National Science Foundation Division of Atmospheric and Geospace Sciences, Award: 1602633
National Science Foundation Division of Atmospheric and Geospace Sciences, Award: 1903504
National Science Foundation Division of Atmospheric and Geospace Sciences, Award: 1602633
National Science Foundation Division of Atmospheric and Geospace Sciences, Award: 1903504
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Griffin, Daniel; Porter, Samantha T; Trumper, Matthew L; Carlson, Kate E; Crawford, Daniel J; Schwalen, Daniel; McFadden, Colin H. (2021). Gigapixel macro photography of tree rings. Retrieved from the Data Repository for the University of Minnesota (DRUM), https://doi.org/10.13020/rep3-nf86.
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GMP_Paper_Figure1.jpg
Image comparison figure
(10.12 MB)
GMP_Paper_Figure2.jpg
Visual aid figure
(11.62 MB)
CCS717B - QUMA - 780ppmm.tiff
Gigapixel image of Quercus macrocarpa tree rings sampled in Minnesota, March 2019
(953.33 MB)
PMC10B - PSMA - 780ppmm.tif
Gigapixel image of Pseudotsuga macrocarpa tree rings sampled in California, June 2016
(6.89 GB)
Readme_219375.txt
Description of the Dataset
(2.87 KB)
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