annotator provides functions to create image annotations
through polygon outlining. Annotator has the same function as
graphics::locator() but achieves its purpose through
drawing, rather than multiple mouse clicks.
annotator is based on fabric.js, a Javascript HTML5 canvas
library and htmlwidgets, a
package that provides a framework for creating R bindings to JavaScript
libraries.
The main function of the package is
annotate(path_to_image). Polygons can be outlined on the
image and polygon’s coordinates are returned after each draw.
annotator makes it easy to create annotation pipelines
in shiny. A minimal Shiny app
demonstrating a simple pipeline can be found on shinyapps.io.
Stable version from CRAN:
install.packages("annotator")Developement version from GITHUB:
remotes::install_github("valcu/annotator")