image_uri: Encode an image file to a data URI
In knitr: A General-Purpose Package for Dynamic Report Generation in R

Description Usage Arguments Value Author(s) References Examples

This function is the same as xfun::base64_uri() (only with a different function name). It can encode an image file as a base64 string, which can be used in the img tag in HTML.

1	image_uri(f)

`f`	Path to the image file.

The data URI as a character string.

Wush Wu and Yihui Xie

https://en.wikipedia.org/wiki/Data_URI_scheme

uri = image_uri(file.path(R.home("doc"), "html", "logo.jpg"))
if (interactive()) {
    cat(sprintf("<img src=\"%s\" />", uri), file = "logo.html")
    browseURL("logo.html")  # you can check its HTML source
}