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    Wyświetlanie 1-16 z 16
    Tytuł:
    Detection of human faces in thermal infrared images
    Autorzy:
    Kowalski, Marcin Ł.
    Grudzień, Artur
    Ciurapiński, Wiesław
    Powiązania:
    https://bibliotekanauki.pl/articles/1849135.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    thermal infrared
    face detection
    biometrics
    human detection
    Opis:
    The presented study concerns development of a facial detection algorithm operating robustly in the thermal infrared spectrum. The paper presents a brief review of existing face detection algorithms, describes the experiment methodology and selected algorithms. For the comparative study of facial detection three methods presenting three different approaches were chosen, namely the Viola-Jones, YOLOv2 and Faster-RCNN. All these algorithms were investigated along with various configurations and parameters and evaluated using three publicly available thermal face datasets. The comparison of the original results of various experiments for the selected algorithms is presented.
    Źródło:
    Metrology and Measurement Systems; 2021, 28, 2; 307-321
    0860-8229
    Pojawia się w:
    Metrology and Measurement Systems
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Histogram of Oriented Gradients with Cell Average Brightness for Human Detection
    Autorzy:
    Wójcikowski, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/221424.pdf
    Data publikacji:
    2016
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    digital image processing
    object detection
    human detection
    Opis:
    A modification of the descriptor in a human detector using Histogram of Oriented Gradients (HOG) and Support Vector Machine (SVM) is presented. The proposed modification requires inserting the values of average cell brightness resulting in the increase of the descriptor length from 3780 to 3908 values, but it is easy to compute and instantly gives ≈ 25% improvement of the miss rate at 10‒4 False Positives Per Window (FPPW). The modification has been tested on two versions of HOG-based descriptors: the classic Dalal-Triggs and the modified one, where, instead of spatial Gaussian masks for blocks, an additional central cell has been used. The proposed modification is suitable for hardware implementations of HOG-based detectors, enabling an increase of the detection accuracy or resignation from the use of some hardware-unfriendly operations, such as a spatial Gaussian mask. The results of testing its influence on the brightness changes of test images are also presented. The descriptor may be used in sensor networks equipped with hardware acceleration of image processing to detect humans in the images.
    Źródło:
    Metrology and Measurement Systems; 2016, 23, 1; 27-36
    0860-8229
    Pojawia się w:
    Metrology and Measurement Systems
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Human Detection in Thermal Images Using Low-level Features
    Autorzy:
    Budzan, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/114333.pdf
    Data publikacji:
    2015
    Wydawca:
    Stowarzyszenie Inżynierów i Techników Mechaników Polskich
    Tematy:
    human detection
    infrared
    feature extraction
    HOG
    Opis:
    In this work the human detection method in infrared has been presented. The proposed solution focuses on the use low-level features and detecting parts of the human body. Low–level processing is based on modified HOG (Histogram of Oriented Gradients) algorithm. First, the only squared cells have been used, also calculation of the gradient has been improved. Next, the model of the head from the dataset IR (Infra Red) images has been created, also the model of the human body. Finally, the probability matrix has been examined using minimal distance classifier. The novelty of the proposed solution focuses on the combination of the pixel-gradient and body parts processing, also three stage classification process (head modelling, human modelling and classifier), which has been proposed to reduce the false detection. The experiments were performed on self-created IR images database, which contains images with most of the possible difficult situations such as overlapped people, different pose, small and high resolution of the people. The performance of the proposed algorithm was evaluated using Precision and Recall quality measure.
    Źródło:
    Measurement Automation Monitoring; 2015, 61, 6; 191-194
    2450-2855
    Pojawia się w:
    Measurement Automation Monitoring
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Crowd Size Estimation and Detecting Social Distancing using Raspberry Pi and OpenCV
    Autorzy:
    Milton, Davidson Kamala Dhas
    Velraj, Arun Ra
    Powiązania:
    https://bibliotekanauki.pl/articles/2200720.pdf
    Data publikacji:
    2023
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    Haar features
    human detection
    distance checking
    raspberry pi
    opencv
    Opis:
    In this covid19 pandemic the number of people gathering at public places and festivals are restricted and maintaining social distancing is practiced throughout the world. Managing the crowd is always a challenging task. It requires monitoring technology. In this paper, we develop a device that detects and provide human count and detects people who are not maintaining social distancing. The work depicted above was finished using a Raspberry Pi 3 board with OpenCV-Python. This method can effectively manage crowds.
    Źródło:
    International Journal of Electronics and Telecommunications; 2023, 69, 1; 19--24
    2300-1933
    Pojawia się w:
    International Journal of Electronics and Telecommunications
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Two-stage classification approach for human detection in camera video in bulk ports
    Autorzy:
    Mi, C.
    Zhang, Z.
    He, X.
    Huang, Y.
    Mi, W.
    Powiązania:
    https://bibliotekanauki.pl/articles/259499.pdf
    Data publikacji:
    2015
    Wydawca:
    Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
    Tematy:
    Human Detection
    Histograms of Oriented Gradients
    Support Vector Machine
    classification
    Opis:
    With the development of automation in ports, the video surveillance systems with automated human detection begun to be applied in open-air handling operation areas for safety and security. The accuracy of traditional human detection based on the video camera is not high enough to meet the requirements of operation surveillance. One of the key reasons is that Histograms of Oriented Gradients (HOG) features of the human body will show great different between front & back standing (F&B) and side standing (Side) human body. Therefore, the final training for classifier will only gain a few useful specific features which have contribution to classification and are insufficient to support effective classification, while using the HOG features directly extracted by the samples from different human postures. This paper proposes a two-stage classification method to improve the accuracy of human detection. In the first stage, during preprocessing classification, images is mainly divided into possible F&B human body and not F&B human body, and then they were put into the second-stage classification among side human and non-human recognition. The experimental results in Tianjin port show that the two-stage classifier can improve the classification accuracy of human detection obviously.
    Źródło:
    Polish Maritime Research; 2015, S 1; 163-170
    1233-2585
    Pojawia się w:
    Polish Maritime Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Research on human silhouette detection methods for a non-cooperative biometric system
    Autorzy:
    Kacperski, D.
    Włodarczyk, M.
    Grabowski, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/397871.pdf
    Data publikacji:
    2015
    Wydawca:
    Politechnika Łódzka. Wydział Mikroelektroniki i Informatyki
    Tematy:
    biometrics
    human silhouette detection
    noncooperative detection
    Viola-Jones
    histogram of gradients
    background subtraction
    biometria
    detekcja sylwetki człowieka
    histogram gradientów
    odejmowanie tła
    Opis:
    Together with the development of effective and efficient people identification algorithms, biometric authentication systems become increasingly popular and widespread, leading to a significant growth in the number of institutions interested in implementing and using such systems. Although, several research works focused their efforts on these type of solutions, none of the commonly available systems provide a non-cooperative approach to object identification. For this reason, they are not suitable for use in some specific situations, such as people entering the stadium. Therefore, we decided to go up against these limitations and develop biometric identification system for less constrained scenarios. In this paper, we present an evaluation of different algorithms suitable for human silhouette detection in such environment. We focus on investigating their effectiveness and performance under unconstrained conditions, such as different lighting.
    Źródło:
    International Journal of Microelectronics and Computer Science; 2015, 6, 1; 10-13
    2080-8755
    2353-9607
    Pojawia się w:
    International Journal of Microelectronics and Computer Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The influence of natural and anthropogenic factors on grain size distribution along the southeastern Baltic spits
    Autorzy:
    Žilinskas, G.
    Jarmalavičius, D.
    Pupienis, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/2059756.pdf
    Data publikacji:
    2018
    Wydawca:
    Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
    Tematy:
    longshore sediment transport
    human activity
    geological framework
    lithological anomalies
    shift regime detection
    Opis:
    The influence of natural and anthropogenic factors on the distribution of sand grain size along sandy beaches is assessed, based on study of three spits of the southeastern Baltic Sea: the Curonian, Vistula and the Hel. 330 sand samples were collected from the beach and foredune at 1 km intervals. Our findings show that although the three spits have some characteristics in common, e.g. a predominance of fine- and medium-grained marine sand on their beaches and foredunes, the grain size distribution patterns of the recent sediments along these spits differ significantly. The key factors determining the grain size distribution include the dominant hydrometeorological regime, anthropogenic activity and geological framework. Trends in the mean grain size differentiation along the Vistula and Curonian spits directly correlate with the direction of the longshore sediment transport: as the distance from sources of the longshore sediment transport increases, the size of sand particles, both on the beach and the foredune, decreases. By contrast, on the Hel Spit, this pattern is disturbed in areas of hydrotechnical construction and artificial beach nourishment. Sand differentiation along the beach can also be predetermined by the geological framework, particularly in lithologically anomalous sections, such as the Juodkrantè settlement on the Curonian Spit.
    Źródło:
    Geological Quarterly; 2018, 62, 2; 375--384
    1641-7291
    Pojawia się w:
    Geological Quarterly
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Optical diagnostic system for visualization subcutaneous blood vessels
    Autorzy:
    Opilski, Zbigniew
    Pustelny, Tadeusz
    Pach, M.
    Hejczyk, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/1818253.pdf
    Data publikacji:
    2020
    Wydawca:
    Polska Akademia Nauk. Stowarzyszenie Elektryków Polskich
    Tematy:
    detection of subcutaneous blood vessels
    light transmission through human skin
    stereoscopic vision of blood vessels
    Opis:
    The paper presents a research concerning the issue of visualization of blood vessels in the human body. In the initial phase of the investigations the focus was on understanding the optical properties of human body tissues. Optical transmittance of human skin was measured. Skin transmittance reaches the maximum at around 670–850 nm and 970–1100 nm. The optimal wavelength suitable for work in reflected and transmitted light was chosen. It was based on extracting blood vessels from the image for using them further in a developed system. A unique measuring system with an integrated illuminator and highly sensitive light detectors for medical imaging and stereoscopic observation was created. The high usable value of the developed system was largely gained by the original numerical program for development of measurement results. The elaborated system of blood vessels’ visualization is a mobile device. It was tested for imaging subcutaneous blood vessels. Three-dimensional observation of circulation and microcirculation in subcutaneous breast tissues is possible. Practical tests of the elaborated device for blood vessels’ medical stereoscopic observations were presented. Tests at a wavelength of 850 nm were performed. It is planned to conduct patient tests in the future at the Maria Skłodowska-Curie Institute - Oncology Center (MSCI), the Branch in Gliwice, Poland.
    Źródło:
    Opto-Electronics Review; 2020, 28, 2; 64--68
    1230-3402
    Pojawia się w:
    Opto-Electronics Review
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Detection of coliforms in drinking water and its effect on human health - a review
    Autorzy:
    Pal, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/11602.pdf
    Data publikacji:
    2014
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    detection
    coliform bacteria
    drinking water
    human health
    Escherichia coli
    water contamination
    health hazard
    public health
    Opis:
    The coliform group has been used extensively as an indicator of water quality and has historically led to the public health protection concept. Total coliforms are a group of bacteria commonly found in the environment, for example in soil or vegetation, as well as the intestines of mammals, including humans. Total coliform bacteria are not likely to cause illness, but their presence indicates that the water supply may be vulnerable to contamination by more harmful microorganisms. Escherichia coli (E. coli) is the only member of the total coliform group of bacteria that is found only in the intestines of mammals, including humans. The presence of E. coli in water indicates recent fecal contamination and may indicate the possible presence of disease-causing pathogens, such as bacteria, viruses, and parasites. Although most strains of E. coli bacteria are harmless, certain strains, such as E.coli 0157:H7, may cause illness. About 80 % of communicable diseases in the world are waterborne. According to WHO estimate about 80 % of water pollution in developing country, like India is carried by domestic waste. In India 70 % of the water is seriously polluted and 75 % of illness and 80 % of the child mortality is attributed to water pollution. The improper management of water systems may cause serious problems in availability and quality of water. The major pathogenic bacteria responsible for water borne disease are spread by the faeco-oral route, in which water may play an intermediate role. The aim of this review is to examine methods currently in use for the detection of coliforms in drinking water and also to evaluate the possible health hazards associated with drinking water contaminated with coliforms.
    Źródło:
    International Letters of Natural Sciences; 2014, 12, 2
    2300-9675
    Pojawia się w:
    International Letters of Natural Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Detection of Giardia intestinalis assemblages in formalin fixed stool samples collected from school children in the Ghazni Province, eastern Afghanistan
    Autorzy:
    Lass, A.
    Korzeniewski, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/6510.pdf
    Data publikacji:
    2016
    Wydawca:
    Polskie Towarzystwo Parazytologiczne
    Tematy:
    detection
    Giardia intestinalis
    child
    school child
    intestinal parasite
    parasitic disease
    human disease
    prevalence
    Ghazni province
    Afghanistan
    Źródło:
    Annals of Parasitology; 2016, 62, Suppl.
    0043-5163
    Pojawia się w:
    Annals of Parasitology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Application of a duplex-PCR for detection of cows' milk in goats' milk
    Autorzy:
    Kotowicz, M
    Adamczyk, E.
    Bania, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/51721.pdf
    Data publikacji:
    2007
    Wydawca:
    Instytut Medycyny Wsi
    Tematy:
    cow milk
    human disease
    goat milk
    food
    allergy
    polymerase chain reaction
    species identification
    milk-derived product
    detection
    milk
    Opis:
    A duplex-PCR method, with 2 pairs of primers recognizing sequences of mitochondrial D-loop region, was developed to identify cows’ milk in the milk of goats. The PCR was shown to be specifi c and sensitive, enabling the detection of less than 1% of cows’ milk added to the milk of goats. Simultaneous use of a primer pair for goats’ and cows’ mitochondrial DNA fragment prevented false negative results. The method was applied to track the presence of cow DNA in goat milk available on the Polish market. A total of 54 milk samples from 3 Polish (34) and one foreign producer (20) were examined. In 33 samples, cow DNA was detected, while 21 samples, including all of the 20 samples from foreign producers, produced the goat-specific product only.
    Źródło:
    Annals of Agricultural and Environmental Medicine; 2007, 14, 2
    1232-1966
    Pojawia się w:
    Annals of Agricultural and Environmental Medicine
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Error Detection in the Navigational Watch Based on the Behavior Analysis of Navigators
    Autorzy:
    Nishizaki, C.
    Takemoto, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/116923.pdf
    Data publikacji:
    2015
    Wydawca:
    Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
    Tematy:
    Navigators’ Situation Awareness Model
    Human Factor
    Situation Awareness
    safety at sea
    Sea Service
    Navigational Watch
    Error Detection
    watchkeeping
    Opis:
    Poor lookouts, i.e. one of errors in situation awareness, are pointed out as the major cause of collisions of ships, through investigations of collision accidents. In order to evaluate safety measures for preventing collisions caused by poor lookouts, it is necessary to understand background factors, so called “contexts”, of errors in situation awareness regardless of occurrence of collisions. The purpose of this study is to point out the possible significant contexts, using a navigator’s situation awareness model. As a result, we point out that one of the possible significant contexts is a problem on judgment of priority levels of other ships with regard to attention.
    Źródło:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2015, 9, 2; 163-168
    2083-6473
    2083-6481
    Pojawia się w:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Detection of Borrelia burgdorferi sensu lato, Anaplasma phagocytophilum and Babesia microti in Ixodes ricinus collected on selected recreational areas of Krakow- Czestochowa Upland
    Autorzy:
    Asman, M.
    Szilman, E.
    Szilman, P.
    Jakubas-Zawalska, J.
    Solarz, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/5623.pdf
    Data publikacji:
    2016
    Wydawca:
    Polskie Towarzystwo Parazytologiczne
    Tematy:
    detection
    Borrelia burgdorferi
    Anaplasma phagocytophilum
    Babesia microti
    Ixodes ricinus
    Lyme disease
    human disease
    granulocytic anaplasmosis
    babesiosis
    recreational area
    Krakow-Czestochowa Upland
    Źródło:
    Annals of Parasitology; 2016, 62, Suppl.
    0043-5163
    Pojawia się w:
    Annals of Parasitology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Human-social interaction robots to improve shared attention in children with autism
    Wykorzystanie interakcji człowiek-robot w celu poprawy rozproszonej uwagi u dzieci z autyzmem
    Autorzy:
    Ashrafi, Ali
    Powiązania:
    https://bibliotekanauki.pl/articles/1837811.pdf
    Data publikacji:
    2021
    Wydawca:
    Politechnika Lubelska. Instytut Informatyki
    Tematy:
    social assistant robots
    autism
    pupil detection
    human-robot interaction
    fuzzy decision making
    roboty społeczne
    autyzm
    interakcja człowiek-robot
    system rozmyty
    podejmowanie decyzji
    Opis:
    The motivation behind the momentum research is use of robots explicitly human robots which has filled drastically in various domains, including treatment. In this examination, a humanoid robot was used to improve open consideration in children with mental imbalance. One of the troubles of this system is that contamination makes remarkable conditions for the patient that the presence of the guide and some other new thing isn't easily recognized. The subsequent test is to pick appropriate figuring and systems for following the head and understudy of the eye in youthful steers with mental awkwardness. One of the credits of which is obligatory and uncontrolled improvements of the head and eyes to the sides. The third issue is the treatment and investigation strategies. The treatment cycle and the arranged tests should not to reason extravagant instigation in the youth. The aim is to beat the referred to troubles, not-withstanding the high-block progressing understudy following count, without the use of business gear. Fleecy decision tree has been used to join clinical and planning information during therapy, ultimately the possibility of instinctive therapy for the improvement of restoratively withdrawn young people has been introduced.
    Źródło:
    Journal of Computer Sciences Institute; 2021, 18; 49-54
    2544-0764
    Pojawia się w:
    Journal of Computer Sciences Institute
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    New high resolution melting PCR assay for detection and differentiation of several Babesia spp. infecting humans and animals
    Autorzy:
    Rozej-Bielicka, W.
    Masny, A.
    Golab, E.
    Powiązania:
    https://bibliotekanauki.pl/articles/6540.pdf
    Data publikacji:
    2016
    Wydawca:
    Polskie Towarzystwo Parazytologiczne
    Tematy:
    babesiosis
    vector-borne disease
    high-resolution melting analysis
    detection
    differentiation
    Babesia
    Babesia canis
    Babesia divergens
    Babesia microti
    Babesia venatorum
    human disease
    animal disease
    Źródło:
    Annals of Parasitology; 2016, 62, Suppl.
    0043-5163
    Pojawia się w:
    Annals of Parasitology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Quasi-autonomiczny pojazd na bazie zestawu Lego Mindstorms NXT
    Lego Mindstorms NXT based quasi-autonomous vehicle
    Autorzy:
    Dimitrova-Grekow, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/155173.pdf
    Data publikacji:
    2011
    Wydawca:
    Stowarzyszenie Inżynierów i Techników Mechaników Polskich
    Tematy:
    pojazdy quasi-autonomiczne
    nawigacja
    mapowanie otoczenia
    komunikacja człowiek-maszyna
    detekcja obiektów
    algorytmy SLAM
    Mindstorms NXT
    quasi-automonous vehicle
    mapping
    object detection
    navigation
    SLAM algorithms
    human-machine communication
    Opis:
    W artykule przedstawiono metodę sterowania pojazdem, która jest analogiczna do wydawania poleceń człowiekowi, czyli operuje na abstrakcyjnych pojęciach. Zbadane zostało na ile możliwa jest budowa takiego systemu korzystając z powszechnie dostępnego sprzętu - zestawu Lego Mindstorms NXT. Główne zadania wykonywane przez robota, to budowanie mapy, osiągnięcie pozycji wskazanej przez operatora oraz wykrywanie i rozpoznawanie prostych obiektów. Badania eksperymentalne wykazały, że zastosowany algorytm rozpoznawaniu obiektów, uzyskał wysoką trafność.
    The presented research evaluates how suitable the Lego Mindstorms NXT sets are for implementing real time algorithms in mobile devices. Therefore, a vehicle control method, based on an abstract commands list, was developed. The main tasks executed by the vehicle are: mapping, reaching a location determined by the operator and recognizing a primitive object. The interface of the project is shown in Fig. 1. It allows the user/operator to observe the map, the parameters of the objects and to send commands from the dynamic generated command list. The implemented mapping and object detection algorithms are shown in Fig. 2. The vehicle construction (Fig. 3) is based on the classical model of 2 steered and one balancing wheel. Tab.1 presents the following test results: the achieved position accuracy, object recognition precision and the time of task completion. The odometry [2, 3] of the construction is not good enough. Navigation could be improved by adding some more precise sensors [4], [5]. The efficiency of the object detection algorithm reaches 75%, which is relatively suitable for the vehicle tasks. The test experience shows that the Lego NXT set is not an easy platform to create a general purpose vehicle, because of the many sensor and motor problems. However, the general positive results speak for its partial suitability by experimental verification of different modern attempts requiring vehicles, avoiding great hardware costs.
    Źródło:
    Pomiary Automatyka Kontrola; 2011, R. 57, nr 8, 8; 839-841
    0032-4140
    Pojawia się w:
    Pomiary Automatyka Kontrola
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
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