Abstract:

The PDF417 barcode,as one of the widely used twodimensional barcodes,is being applied to various kinds of goods.There are few researches on the recognition of the PDF417 barcode upon cylinder side surface,though goods in cylinder shape are common in life.To rectify the PDF417 barcode,an algorithm based on local warp perspective transformation is proposed.The PDF417 barcode upon cylinder side surface is segmented into several sub areas first,then the perspective transformation will be done on these sub areas.Finally, these sub areas are joined together and the rectified barcode is obtained.Experimental results show that this algorithm can effectively transform the PDF417 barcode upon cylinder side surface into one upon plane,so that the contained information can be decoded successfully.

Key words: PDF417;line detection;perspective transformation;barcode rectification