The base background recognition service protocol, inherited by the RTRDataCaptureService and RTRTextCaptureService protocols.
Requires a delegate that conforms to the RTRRecognitionServiceDelegate protocol. The recognition service informs the delegate when the result is ready, as well as sending information about current progress and errors.
Sends the video frame obtained from camera to the recognition service.
Sets the area on the frame where the text is to be found.
Stops processing and releases the resources used by the recognition service.