Shameless plug: I'm working on a startup in this space. But the bounding box problem hits close to home. We've found Unstructured's API gives pretty accurate b

Shameless plug: I'm working on a startup in this space. But the bounding box problem hits close to home. We've found Unstructured's API gives pretty accurate box coordinates, and with some tweaks you can make them even better. The tricky part is implementing those tweaks without burning a hole in your wallet.