O'K, let me explain. Arduino has no idea about RF protocol. So, BT or XBee for arduino absolutely no difference, just some serial devices on other end of serial link to get or send information from / to.
It also apply to JPEG cameras, Arduino has no clue what is model / maker, all it know is serial device that support specific set of the commands. This set of commands would be managed in software, so basically you can get application - program code written for arduino to communicate with one JPEG camera, and rework it for your camera just replacing one set command for another.
For example, on 4dsystems camera GET PICTURE (AA04h).
on LinkSprite, something like - Command(HEX)
56 00 32 0C 00 0A 00 00 MH ML 00 00 KH KL XX XX
LinkSprite has posted a code for Arduino:
Unfortunately I was not able to locate similar arduino code on d4systems site.
I'd suggest, to make a search by two words d4systams + arduino code on google,
may be arduino code + jpeg camera.
Any example shouldn't not be an issue to modify, that what I thought .
It's not "out of box" solution, rather starting point