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1
Content available remote Demonstrator biometrycznego systemu wjazdu/wyjazdu do strefy Schengen – badania eksperymentalne
Pałka N., Czerwińska E., Szustakowski M., Jodłowski L., Piszczek M., Młyńczak J., Walczakowski M., Kowalski M., Grudzień A., Ciurapiński W., Wróbel J., Olejnik J., Kościug B., Badaczewska I., Piotrowski K., Hołoweńko P., Poźniak P., Pachla S.
Przegląd Elektrotechniczny
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2018
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R. 94, nr 6
109--114
PL
W pracy opisano budowę i podstawowe funkcjonalności biometrycznego demonstratora technologii inteligentnej granicy. Przeprowadzone testy potwierdzają, że aplikacje działają stabilnie, a system poprawnie realizuje wszystkie założone funkcjonalności. W testach rozpoznawania wizerunku twarzy skuteczność działania systemu wynosi 98%. Skuteczność weryfikacji osób na podstawie odcisków czterech palców jest bardzo wysoka (zbliżona do 100%) i warunkowana głównie przez jakość pobranych odcisków palców. Czasy poszczególnych odpraw są akceptowalne i zbliżone do wyników uzyskiwanych w innych badaniach.
EN
The paper describes the construction and basic functionalities of the biometric demonstrator of the smart border technology. Carried out tests confirm that the applications are stable and the system correctly implements all assumed functionalities. In the tests of facial image recognition, the effectiveness of the system is 98%. The effectiveness of verification of people based on fingerprints is very high (close to 100%) and conditioned mainly by the quality of finger images. Times of border checks are acceptable and similar to the results achieved in other studies.
2
Content available remote Weryfikacja osób na podstawie wizerunku twarzy i odcisku palca – badania eksperymentalne
Pałka N., Czerwińska E., Szustakowski M., Piszczek M., Młyńczak J., Walczakowski M., Kowalski M., Grudzień A., Jodłowski L., Ciurapiński W., Wróbel J., Sobczak M., Nawrocki M., Hołoweńko P., Poźniak P., Pachla S., Firmanty K.
Przegląd Elektrotechniczny
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2017
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R. 93, nr 11
152--157
PL
W pracy opisano wyniki badań eksperymentalnych dotyczące weryfikacji osób na podstawie wizerunku twarzy i odcisku palca. Opracowany system automatycznie odczytuje z polskiego paszportu biometrycznego powyższe dane, określa ich jakość i porównuje z danymi pobranymi od podróżnego na żywo. Dla 621 podróżnych eksperymentalnie wyznaczona skuteczność weryfikacji na podstawie obu cech wynosi 88%. Stosując logikę ważoną tę skuteczność można podnieść do 94%.
EN
The paper describes the results of experimental research on the verification of persons based on facial image and fingerprints. The developed system automatically acquires data from the Polish biometric passport, determines their quality and compares with the data collected from the live traveller. For 621 travellers, the experimentally determined verification efficiency basing on both features equals to 88%. This efficiency can be increased to 94% by means of the weighted logic.
3
Content available remote Optimisation of construction of two-channel acousto-optic modulator for radio-signal phase detection
Jodłowski L.
Opto-Electronics Review
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2003
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Vol. 11, No. 1
55-63
EN
Two-channel acousto-optic modulator (AOM) makes simultaneous assignment of the frequency and phase of radio-signals possible. AOM is a fundamental element of a spectrum analyser based on acousto-optic receiver. In the paper, an analysis of influence of structural elements on characteristics of a two-channel modulator was shown and the procedure of optimisation of its construction described. Basing on this procedure the modulator for spectrum analysis at GSM band was designed, performed and investigated. The two-channel acousto-optic modulators give the possibility of detection and defining direction of radiation with accurancy of optimisation of construction of two-channel acousto-optic modulator for radio-signal phase detection 0,5⁰ .
4
Content available Measurement of biological tissue properties using the ultrasound method
Szustakowski M., Jodłowski L., Piszczek M.
Hydroacoustics
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2001
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Vol. 4
225--230
EN
The elastic properties and velocity of acoustic sound propagation in soft tissues, permits applying the liquid model in research. In regard to the low level of ultrasound power admissible in research in vivo, a new method, implementing quasi-continuous wave, was proposed. The base for determination of the medium parameters, is utilising the conversion of receiver signal to digital form and counting the phase of signal numerically. Presented method was implemented in monitoring the condition of brain, and it gives the possibility to detect changes of density on level 50 ppm, and changes of temperature 0,02oC with medium power over 100 times less then the admissible. That method, in regard to the measurement set-up's simplicity and high accuracy, can find implementation in other technical solutions and scientific research.
5
Content available Verification of measurement possibilities of quasi-continuous acoustic wave packets for technical and medical applications
Szustakowski M., Jodłowski L., Piszczek M.
Archives of Acoustics
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2001
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Vol. 26, no. 2
133-141
EN
Quasi-continuous acoustic wave packets are used for investigations of real objects due to determination of their material parameters such as, for example, propagation velocity of an acoustic wave, or localisation of their inner structures. Application of low sampling frequencies (500kHz) in comparison with the strict harmonic probing signals ~1.5MHz offers very promising measuring possibilities (detection of the transit time changes of acoustic signal ?5ns). This paper shows the test measurement results for a glass vessel (300mm probing path in distilled water) and patients with pathological changes (ischemia and internal haemorrhage in the brain tissue) using the phase and time methods. High sensitivity of measurements ensures detection of differences in density of the order of ~3ź10-3kg/m3, propagation velocity of acoustic wave ~4ź10-2m/s, temperature ~1.5ź10-2K and change of the acoustic path ~4žľm. Sensibility and simplicity of the measuring system makes the proposed solution a very attractive tool for investigations. It can be applied for measurement of different changes of the material properties in the automatic systems and medicine.
6
Implementation of Digital Correlation in Analyse Echo Pulses of Piezoelectric Transducers
Jodłowski L.
Molecular and Quantum Acoustics
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2000
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Vol. 21
87-92
7
Conception, Advantages and Limitations of Measuring Direction to User of Working Cellular Phone with Acoustooptic Processor for Frequency and Phase of RF Signal Measuring
Jodłowski L., Szustakowski M., Bobrowicz R.
Molecular and Quantum Acoustics
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2000
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Vol. 21
93-100
8
Content available Kompresja impulsu ultradźwiękowej paczki falowej przez zastosowanie cyfrowej korelacji i procedury lokalizacji sygnału echa
Szustakowski M., Jodłowski L., Fokow K.
Hydroacoustics
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2000
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Vol. 3
213--218
EN
A method of ultrasonic echo is one of widely used method for medical ultrasonography or sonars. The paper describes localisation of objects using ultrasonic pulse wave of 200µs duration and frequency chirp of 1 to 2MHz. Compression of pulse and echo time determination were calculated by means of digital correlation procedure.
9
Some Issues on Phase Analysis
Szustakowski M., Ciurapinski W., Jodłowski L.
Molecular and Quantum Acoustics
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1999
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Vol. 20
263-277
10
Passage Time Measurement of Medium Probe Signal with the Use of Phase Method with Quasi-Continuous Wave
Szustakowski M., Jodłowski L., Piszczek M.
Molecular and Quantum Acoustics
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1999
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Vol. 20
279-289
EN
ln the paper we discuss the passage time measurement method of medium probe signal based on the analysis of phase of acoustic bulk waves. The application to be presented uses rwo quasi-continuous acoustic waves with different frequencies. The measurement process is based on low-frequency signal sampling and then a computer data processing uses an apropriate calculation algorithm. Although, the method hasn't been practicaly verified completely, the preliminary researches and computer simulations show that it is possible to measure the time with resolution lower then 0.01 of probe wave period, what gives almost equal to 5ns with working frequency equal to l,4(6)MHz.
11
Analysis of Measurement Possibilities of Long Bulk Wave for Technical Application
Jodłowski L., Szustakowski M., Piszczek M.
Molecular and Quantum Acoustics
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1999
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Vol. 20
103-108
EN
Phase velocity is one of the most important of the parameters characterising the elasticity proprieties of solids, liquids and gases. In reality it depends on absolute value of elasticity and density of medium. The measurement of phase velocity is one of the most important issue in the field of fundamental researches of materials. So a lot of measure methods of phase velocity have been developed. In the paper we discus using of phase measurements for phase velocity calculation.
12
Analysis of Cross-Talk Signals in Two Channel Acoustooptic Modulator
Jodłowski L.
Molecular and Quantum Acoustics
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1999
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Vol. 20
93-101
EN
Acoustooptic modulators (deflectors) find implementation as high speed spectrum analysers. Change of its construction by add second electrode and analyse of interference picture, give possible measure the phase of signal. They make of possible measure of frequency and direction of propagation signal simultaneously. The main of problems resolved in this implementation is a cross talk signals. In this paper described influence of cross talk factor on measuring errors, possibilities of correction and results of implementation correction procedure. In laboratory set-up the standard errors of measure the phase of signal 3 0 was obtained.
13
Pomiar zmian prędkości fazowej w cieczy z zastosowaniem cyfrowego przetwarzania sygnału
Szustakowski M., Jodłowski L., Piszczek M.
Molecular and Quantum Acoustics
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1998
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Vol. 19
271-280
14
Measurement of harmonic signal phase with application of low frequency of sampling
Jodłowski L.
Molecular and Quantum Acoustics
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1998
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Vol. 19
111-117
EN
Measurement of harmonic signal phase is the basis of many measuring methods. Till now, the analog interferometric methods were used and application of digital A/C converters possibility of signal phase measurement basing on the known instantaneous values (samples) of the signal. It is assumed that for univocal determination of signal phase, the sampling frequency should exceed, at least two times, the frequency of the analysed harmonic (Nequist theorem) [1]. In the paper the possibility of application of sampling frequencies (sampling rate) of the values significantly lower that frequencies of the investigated signal was considered
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