Web Page Click Through Heat Map using R

I am trying to figure out if there is a way to create heat map on the top of an screenshot image.

So, I have a web page screenshot JPEG image. I also have monthly click rates data for each UI elements in the page. Now I want to use R to create heatmap (translucent) so that it will be easier for people to know where end users are clicking more and vice-versa.

I can create simple heatmaps and graphs using R, but it seems to be far from where I want to be.

If you have done this or have ideas please do share.

Thanks