slice up latex pdf to little jpeg's

Question

What I would like to achieve

I would like to take all the equations in a pdf file and convert them to individual jpegs, is this possible, say by passing a compiler option?

• I specifically don't want to use any latex stuff on the web, I would like an automated workflow to handle an arbitrarily large number of equations/jpeg files

• I'm using emacs/linux so any command line tricks are fair game and desired

• currently I'm using shutter to manually do this. Even for a small number of equations this is troublesome, because the uniformity (bounding box around equation) is an issue

Idea on how to achive this

• possibly render each equation as it's own pdf using some TeX trickery, then using a tool like imagemagick convert to other formats

• This workflow using pdfcropp and pdftoppm seems like a start but doesn't crop each equation individually.

Thanks!