A Skew Detection Algorithm for PDF417 Based on Feature Point
Jian Hua Li, Ping Li, Xiao Dan Li, Yi Wen Wang · Applied Mechanics and Materials · 2011
The automatic identification of 2D (two dimensional) bar code PDF417 is very sensitive to skew angle, but, the common skew angle detection methods have shortcomings such as weak performance in time complexity. In this paper, based on the properties of PDF417 character code and the extraction of feature points, we get skew angle of PDF417 bar code image using the least square method. Experiments show that this algorithm has virtue of less computation and high accuracy.