Mobile device based text detection and tracking

A mobile station (MS) comprising:

• a camera configured to capture a first image frame and a set of subsequent image frames, and
• a processor coupled to the camera, the processor comprising:
• a word recognition module configured to:
• obtain a first reference frame by performing Optical Character Recognition (OCR) on the first image frame to locate and recognize a first text block,
• select a subsequent image frame from the set of subsequent image frames, based on parameters associated with the selected subsequent image frame;
• and
• obtain a second reference frame by performing OCR on the selected subsequent image frame to recognize a second text block;
• and
• a text assembler module configured to determine a geometric relationship between the first and second text blocks based, at least in part, on a position of the first text block in the second reference frame and a camera pose associated with the second reference frame.

An apparatus comprising:

• imaging means for capturing a sequence of image frames,
• means for obtaining a first reference frame by performing Optical Character Recognition (OCR) on an image frame in the sequence of image frames to locate and recognize a first text block,
• means for selecting a subsequent image frame from the sequence of image frames, the selection based on parameters associated with the selected subsequent image frame,
• means for obtaining a second reference frame by performing OCR on the selected subsequent image frame to recognize a second text block, and
• means for determining a geometric relationship between the first and second text blocks based, at least in part, on a position of the first text block in the second reference frame and a pose of the imaging means associated with the second reference frame.

A non-transitory computer-readable medium comprising instructions, which, when executed by a processor, perform a method on a Mobile Station (MS), the method comprising:

• obtaining a first reference frame by performing Optical Character Recognition (OCR) on an image frame captured by a camera on the MS to locate and recognize a first text block;
• selecting a subsequent image frame from a set of subsequent image frames, the selection based on parameters associated with the selected subsequent image frame;
• obtaining a second reference frame by performing OCR on the selected subsequent image frame to recognize a second text block;
• and
• determining a geometric relationship between the first and second text blocks based, at least in part, on a position of the first text block in the second reference frame and a camera pose associated with the second reference frame.