R knitr html file picture locations when compiling through RStudio -

R knitr html file picture locations when compiling through RStudio -

when create knitr document, see html file in directory. load file , looks great.

however, i'm curious pictures are:

it gives me locations like:

img src="data:image/png;base64,ivborw0kggoaaaansuheugaacqaaaayacayaaaajfnetaaaejgldq1bjq0mguhjvzmlszqaaobgfvd9v21qupolvuqqwpybyr4ekxa9vu1u5gxqtxgzjk6xtshal6dgqjoq6n4mpgwfb6baqt3ubnwb8audzaw9ipcenbmj72fbatelthyqqsuh76mq ...."

where image?

this image straight encoded in html. http://en.wikipedia.org/wiki/data_uri_scheme

see f.e. stack overflow question: embedding base64 images

kind greetings

r knitr rstudio