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outlineR: An R package to derive outline shapes from (multiple) artefacts on JPEG images

David N. Matzig

Description

This package is a helpful wrapper around functions from mainly the Momocs (Bonhomme et al. 2014), EBImage (Pau et al. 2010), and imager (Barthelme et al. 2020) packages. It is designed for the fast and easy extraction of single outline shapes of, for example, stone tools from images containing multiple thereof, such as the ones present in archaeological publications.

This release is provided with a testing dataset, using the Morar Quartz Industry image (Credit: Wellcome Collection, https://wellcomecollection.org/works/th7egtfj, distributed under CC BY 4.0).

A brief explanation of the workflow and the package functions can be found on github.com/yesdavid/outlineR.

References

Barthelme et al. 2020: Barthelme, S., Tschumperle, D., Wijffels, J., Assemlal, H. E., & Ochi, S. (2020). imager: Image Processing Library Based on “CImg” (0.42.3) [Computer software]. https://CRAN.R-project.org/package=imager

Bonhomme et al. 2014: Bonhomme, V., Picq, S., Gaucherel, C., & Claude, J. (2014). Momocs: Outline Analysis Using R. Journal of Statistical Software, 56(13). https://doi.org/10.18637/jss.v056.i13

Pau et al. 2010: Pau, G., Fuchs, F., Sklyar, O., Boutros, M., & Huber, W. (2010). EBImage—An R package for image processing with applications to cellular phenotypes. Bioinformatics, 26(7), 979–981. https://doi.org/10.1093/bioinformatics/btq046

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