Image annotation using free drawing.
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.
Installation
Stable version from CRAN:
install.packages("annotator")
Developement version from GITHUB:
remotes::install_github("valcu/annotator")