Framing aid for a document capture device

摘要

A framing aid for a handheld document capture device such as a digital camera, comprising two pattern generators ( 10,20 ) generating convergent patterns ( 14, 24 ) that are in register on a target object plane. Triangulation between the two pattern generators ( 10,20 ) and using superimposed or complementary patterns ( 14,24 ) ensures that the hand held device ( 1 ) is correctly arranged at a predetermined range and orientation above a document to be captured, such that the document is accurately framed within the field of view of the capture device ( 1 ).