UNIX for Advanced & Expert Users

It's not even that it's not a standard image format -- it's that its calculated and rendered by javascript on load time! Imagemagick won't be able to touch that. Screen capture would work but would be annoying to automate. You'd almost do better to extract the equations and render it yourself...

Well, this might be out there but what I was hoping to do with the image-capture (using imagemagik) is have a remote user create the graph client side. Then if they want to save the graph, they click a button which sends the information back to the server and runs a script that launches a web browser and goes to a url that reads in the saved data. Then the imagemagik window capture will execute to output an image of the graph, which the user can then download...this is why I was saving it for last resort. Is it possible to take a screen shot of a window on a remote server?

Hm. At that point, the client will already have the data. When you right-click on the image and select 'view image' you will find the web browser interprets it as a data:// URL -- the image entire is encoded in the URL itself. If you can extract that URL, or at least copy/paste it, you've got the image.

Never mind. The data:// URL is just a blank white 300x500px image.

Perhaps you can get xsnap working. I've posted a generic x86 version here, converted to tar.gz from an rpm. You don't need to actually install it to use it, just extract it somewhere and run the xsnap binary in it, it'll let you draw a square on the screen, which'll then pop up as a new window. right-click on the new window and it'll let you save it as png.