The correlation of several 1-D projections of a 2-D image are considered for pattern recognition. A theoretical analysis and SNR comparison to 2-D correlations are provided with successful simulated results that show that the use of two or three 1-D correlations can identify and discriminate the 26 characters in the alphabet. Several possible 1-D optical correlators to implement projection correlations are described.
© 1988 Optical Society of America
Original Manuscript: April 12, 1988
Published: December 1, 1988
David P. Casasent and Jung-Hee Song, "Optical projection correlations," Appl. Opt. 27, 4977-4984 (1988)