Need an software on PC or an app on a phone which will click pictures on many other smart phones, say 10 of them using bluetooth.
And then download pics from all those phones.
BIP ie Basic Imaging Profile may be used.
I have understood your task completely. I can design android based app which will synchronously capture photos from all the connected devices and download them to one specific system. Message me to know more details.
I can design a windows application/software that will capture and download the photos from mobile using WiFi. It will be faster and more easy to use.