Does anyone have an idea of how you could recognise the text in an image through the camera on the device and send back the return value as string?
In general, you would need an OCR engine.
The OCR engine could be built into the mobile app or be cloud based. You could also have your own OCR engine and running it on your own servers (to meet security/privacy requirements).
Making it to work real time is not as easy.
For example, Google recently bought Word Lens that does real time OCR and translation.
I did some internet searches (OCR image, OCR iOS/Android, OCR PhoneGap plugin, OCR REST API).
I found some references to the Tesseract OCR engine.
Here are some links that might be useful:
I have not tried any of these plugins/web services myself.
I hope this helps.
thanks very much. i will have a look, hopefully i get this to work.