Location Algorithm of PDF417 Based on Wavelet Multi-resolution Analysis
基于小波多分辨率分析的 PDF417 定位算法

To improve the efficiency of detecting and locat- ing PDF417 two-dimensional barcode,an automatic detecting and locating approach based on wavelet multi-resolution analy- sis is presented,in which the regional growth method based on feature vector and texture comparability theory is adopted to produce the candidate sub-area set of two-dimensional barcode in high frequency sub-images,and then the candidate sub-area set are verified by examining the start/stop pattern and edge characteristics of PDF417 in low frequency sub-image to gain the location of PDF417 in original image.Experiments show that the approach can detect and locate exactly the two dimen- sional barcode for PDF417 with different backgrounds,and is superior to the traditional algorithms in practicability.