I am trying to pull together information that is scattered across a multipage PDF in an org buffer. The related items typically occupy a small region on a page only and may be many pages apart, hence the attempt to arrange them side by side in an org buffer where these images shall be included as a visual cue as org inline images along with a commentary.
Ideally, the region of interest would be drawn interactively as a rectangle and pasted in the org buffer in a way that saved the image locally in a subfolder next to the org file and inserted a link to the local file.
I am aware of "Automatic screenshot insertion” over at http://orgmode.org/worg/org-hacks.html which involves imagemagick and seems to do what I want except I see no obvious way to crop the screenshot before inserting the link. Saving the file first and cropping it manually is a stronger disruption of the workflow than I'd like since I expect lots of these.
2) accessing the system clipboard
Depositing a suitably cropped screenshot to the system's clipboard in OS X is easily done using grab.app. If this could be used, that'd be fine.