A bar code location algorithm using a two-dimensional approach

C. Viard-Gaudin, N. Normand, D. Barba
Proceedings of 2nd International Conference on Document Analysis and Recognition (ICDAR '93)  
The problem of reading the destination address directly as it is written for a human operator is a very difficult aspect of the postal automation problem. Consequently, an alternative solution could be to encode this destination address in a bar code label on the parcel. We propose a method for locating bar code blocks on parcels. One of the main dificulties involved is both the very poor quality and at the same time the potential high complexity of the grey level images. As a matter of fact,
more » ... e image resolution has been chosen as low as possible in order to enlarge the field of view for a given number of CCD elements, and furthermore the focus of the camera has been kept constant in spite of the variation in height of the objects resulting in the presence of high convolution distortion such that the width of the point spread function can be much larger than the width of a single stripe. Our approach relies on the extraction of areas having a high density of mono-oriented gradient. This bar code finder algorithm works correctly for all images of a base provided by the French postal services. 45 0-8186-4960-7/93 $3.00 0 1993 IEEE
doi:10.1109/icdar.1993.395785 dblp:conf/icdar/Viard-GaudinNB93 fatcat:7zywxczfi5eufpuhheswialgpy