Banknote splicing seam or crease recognition method and system

• Main Authors: GUO LIHU, XIA AIHUA
• Format: Patent
• Language: Chinese; English
• Published: 04.05.2016
• Subjects: CHECKING-DEVICES; HANDLING OF COINS OR OF PAPER CURRENCY OR SIMILAR VALUABLEPAPERS, e.g. TESTING, SORTING BY DENOMINATIONS, COUNTING,DISPENSING, CHANGING OR DEPOSITING; PHYSICS

The invention discloses a banknote splicing seam or crease recognition method and system. A method of combination of a differential edge detection operator and a proportional coefficient method for binarization is adopted so that weak splicing seam signals can be extracted and recognized. Besides, special processing and limiting modes that the number and length of splicing seams or creases to be recognized are set and angle range of the splicing seams or creases to be recognized on a banknote is limited are applied, an image vertical and horizontal projection method is adopted when a polar angle theta is close to a horizontal or vertical angle, and a Hough transformer detection algorithm is adopted when the polar angle theta largely deviates from the horizontal or vertical angle so that algorithm time is greatly shortened, the objective of rapid detection of the splicing seams or creases can be achieved, algorithm real-time performance can be greatly solved and recognition performance can be guaranteed, the r