Provided with an image 'mask' (i.e. black pixels on a white background), and a point form where to start the algorithm, returns the (x; y) coordinates of its outline.
import_Conte(img, x)a matrix the (x; y) coordinates of the outline points.
a matrix of a binary image mask.
numeric the (x; y) coordinates of a starting point within the shape.
Used internally by import_jpg1 but may be useful for other purposes.
The original algorithm is due to: Pavlidis, T. (1982). Algorithms for graphics and image processing. Computer science press.
is detailed in: Rohlf, F. J. (1990). An overview of image processing and analysis techniques for morphometrics. In Proceedings of the Michigan Morphometrics Workshop. Special Publication No. 2 (pp. 47-60). University of Michigan Museum of Zoology: Ann Arbor.
and translated in R by: Claude, J. (2008). Morphometrics with R. (p. 316). Springer.
Other import functions:
import_StereoMorph_curve1(),
import_jpg1(),
import_jpg(),
import_tps(),
import_txt(),
pix2chc()