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KDE Itinerary - Vector Graphic Barcodes

Submitted by Rianne Schestowitz on Saturday 13th of July 2019 05:15:26 PM Filed under
KDE

I have previously written about why we are interested in barcodes for the KItinerary extractor. This time it’s more about the how, specifically how we find and decode vector graphic barcodes in PDF files, something KItinerary wasn’t able to do until very recently.

While PDF is a vector graphics format, most barcodes we encounter in there are actually stored as images. Technically this might not be the cleanest or most efficient way, but it makes KItinerary’s life very easy: We just iterate over all images found in the PDF, and feed them into the barcode decoder.

It’s of course a bit more complicated to make this as efficient as possible, but conceptually you could script this with Poppler’s pdfimages command line tool and ZXing with just a few lines of code.

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