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Validation of Legal Documents by comparing digital and printed photographs

Bruins, L.L.E. (2020) Validation of Legal Documents by comparing digital and printed photographs.

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Abstract:This paper discusses the comparison of the photos on legal documents. The documents have a chip photo and a printed photo. Those two photos should be the same. An algorithm is designed to compare whether the chip photo and the printed photo originate the same. Direct comparison is impossible, because a photo is made of the whole document instead of only a photo of the printed photo. Research was done to compare different methods for aligning the document photo with the chip photo and the comparison of the photos. Research shows that SURF feature detection performed best for aligning the document photo with the chip photo and to check whether the two photos are the same. Binary images performed best to compare the photos without being bothered by differences in brightness, contrast and sharpness. An experiment is designed to check how well both parts of the algorithm perform separately. Another experiment is designed to check how well the overall algorithm performs. All experiments are based on comparing the chip photo with the document photo of the same photo, same person but different photos (for instance passport and drivers license) and different persons. The results show that overall the algorithm works sufficient. Only alignment based on SURF is not performing sufficient if the document photo is taken at an angle or when the same chip photo and document photo of residence permits are compared. The printed photos on the document photo of residence permits are invisible, because of a glare caused by the angle of incidence of light.
Item Type:Essay (Bachelor)
Faculty:EEMCS: Electrical Engineering, Mathematics and Computer Science
Subject:53 electrotechnology, 54 computer science
Programme:Electrical Engineering BSc (56953)
Link to this item:http://purl.utwente.nl/essays/80510
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