20.500.12556/RUL-136351 Image acquisition device for smart-city access control applications based on iris recognition In this work, we present an eye-image acquisition device that can be used as an image acquisition front-end application in compact, low-cost, and easy-to-integrate products for smart-city access control applications, based on iris recognition. We present the advantages and disadvantages of iris recognition compared to fingerprint- or face recognition. We also present the main drawbacks of the existing commercial solutions and propose a concept device design for door-mounted access control systems based on iris recognition technology. Our eye-image acquisition device was built around a low-cost camera module. An integrated infrared distance measurement was used for active image focusing. FPGA image processing was used for raw-RGB to grayscale demosaicing and passive image focusing. The integrated visible light illumination meets the IEC62471 photobiological safety standard. According to our results, we present the operation of the distance-measurement subsystem, the operation of the image-focusing subsystem, examples of acquired images of an artificial toy eye under different illumination conditions, and the calculation of illumination exposure hazards. We managed to acquire a sharp image of an artificial toy eye sized 22 mm in diameter from an approximate distance of 10 cm, with 400 pixels over the iris diameter, an average acquisition time of 1 s, and illumination below hazardous exposure levels. iris recognition image acquisition access control image sensors image processing razpoznava šarenice zajem slik nadzor dostopa slikovni senzorji obdelava slik true false true Angleški jezik Slovenski jezik Članek v reviji 2022-04-25 14:23:35 2022-04-25 14:23:36 2022-09-15 04:13:47 0000-00-00 00:00:00 2021 0 0 19 str. iss. 18, art. 6185 Vol. 21 Sep. 2021 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 004.93 1424-8220 10.3390/s21186185 76627971 sensors-21-06185-v2.pdf sensors-21-06185-v2.pdf 1 513457FE756EBAECBB7BE40BD0611479 462622f8d9d690e8d805e464a2fca2ececc1885191d15a04ee3774a1067c6710 b27f5260-c492-11ec-8aca-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=155950 https://www.mdpi.com/1424-8220/21/18/6185 1 7470b35d-c492-11ec-8aca-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=155949 Fakulteta za elektrotehniko 0 0 0