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Wyświetlanie 1-5 z 5
Tytuł:
Klasyfikacja obiektów na podstawie ich zdjęć rentgenowskich
Object classification using X-ray images
Autorzy:
Nowosad, Piotr
Charytanowicz, Małgorzata
Powiązania:
https://bibliotekanauki.pl/articles/98446.pdf
Data publikacji:
2020
Wydawca:
Politechnika Lubelska. Instytut Informatyki
Tematy:
object classification
geometric features
image processing
X-ray imaging
klasyfikacja obiektów
cechy geometryczne
przetwarzanie obrazów
obrazowanie rentgenowskie
Opis:
The main aim of the presented research was to assess the possibility of utilizing geometric features in object classifica-tion. Studies were conducted using X-ray images of kernels belonging to three different wheat varieties: Kama, Canadi-an and Rosa. As a part of the work, image processing methods were used to determine the main geometric grain parameters, including the kernel area, kernel perimeter, kernel length and kernel width. The results indicate significant differences between wheat varieties, and demonstrates the importance of their size and shape parameters in the classification process. The percentage of correctness of classification was about 92% when the k-Means algorithm was used. A classification rate of 93% was obtain using the K-Nearest Neighbour and Support Vector Machines. Herein, the Rosa variety was better recognized, whilst the Canadian and Kama varieties were less successfully differentiated.
Głównym celem artykułu było zbadanie możliwości wykorzystania cech geometrycznych obiektów w procesie ich klasyfikacji. Materiał badawczy stanowiły zdjęcia rentgenowskie ziaren trzech odmian pszenicy: kama, kanadyjskiej i rosa. W ramach pracy opracowano metody pozwalające na wyznaczenie cech geometrycznych obiektów znajdujących się na obrazach cyfrowych, takich jak długość, szerokość, średnica, pole i obwód. Otrzymane wyniki wykazały istotne różnice pomiędzy parametrami charakteryzującymi kształt i wielkości poszczególnych odmian pszenicy i możliwość ich zastosowania w procesie klasyfikacji. Procent poprawnie zaklasyfikowanych ziaren za pomocą algorytmu k-średnich wynosił 92%. Nieco lepsze wyniki, rzędu 93%, uzyskano za pomocą metod K-najbliższych sąsiadów i wek-torów wspierających. Najlepiej rozróżnialną odmianą okazała się rosa w porównaniu do odmian kanadyjskiej i kama.
Źródło:
Journal of Computer Sciences Institute; 2020, 15; 206-213
2544-0764
Pojawia się w:
Journal of Computer Sciences Institute
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Detection of fillers in the speech by people who stutter
Autorzy:
Suszyński, Waldemar
Charytanowicz, Małgorzata
Rosa, Wojciech
Koczan, Leopold
Stęgierski, Rafał
Powiązania:
https://bibliotekanauki.pl/articles/1956029.pdf
Data publikacji:
2021
Wydawca:
Polskie Towarzystwo Promocji Wiedzy
Tematy:
stuttering
fillers disfluency
automatic recognition
fillers detection
jąkanie
dysfluencja
automatyczne rozpoznawanie
wykrywanie
Opis:
Stuttering is a speech impediment that is a very complex disorder. It is difficult to diagnose and treat, and is of unknown initiation, despite the large number of studies in this field. Stuttering can take many forms and varies from person to person, and it can change under the influence of external factors. Diagnosing and treating speech disorders such as stuttering requires from a speech therapist, not only good professional prepa-ration, but also experience gained through research and practice in the field. The use of acoustic methods in combination with elements of artificial intelligence makes it possible to objectively assess the disorder, as well as to control the effects of treatment. The main aim of the study was to present an algorithm for automatic recognition of fillers disfluency in the statements of people who stutter. This is done on the basis of their parameterized features in the amplitude-frequency space. The work provides as well, exemplary results demonstrating their possibility and effectiveness. In order to verify and optimize the procedures, the statements of seven stutterers with duration of 2 to 4 minutes were selected. Over 70% efficiency and predictability of automatic detection of these disfluencies was achieved. The use of an automatic method in conjunction with therapy for a stuttering person can give us the opportunity to objectively assess the disorder, as well as to evaluate the progress of therapy.
Źródło:
Applied Computer Science; 2021, 17, 4; 45-54
1895-3735
Pojawia się w:
Applied Computer Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Efficient astronomical data condensation using approximate nearest neighbors
Autorzy:
Łukasik, Szymon
Lalik, Konrad
Sarna, Piotr
Kowalski, Piotr A.
Charytanowicz, Małgorzata
Kulczycki, Piotr
Powiązania:
https://bibliotekanauki.pl/articles/907932.pdf
Data publikacji:
2019
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
big data
astronomical observation
data reduction
nearest neighbor search
kd-trees
duży zbiór danych
obserwacja astronomiczna
redukcja danych
wyszukiwanie najbliższego sąsiada
drzewo kd
Opis:
Extracting useful information from astronomical observations represents one of the most challenging tasks of data exploration. This is largely due to the volume of the data acquired using advanced observational tools. While other challenges typical for the class of big data problems (like data variety) are also present, the size of datasets represents the most significant obstacle in visualization and subsequent analysis. This paper studies an efficient data condensation algorithm aimed at providing its compact representation. It is based on fast nearest neighbor calculation using tree structures and parallel processing. In addition to that, the possibility of using approximate identification of neighbors, to even further improve the algorithm time performance, is also evaluated. The properties of the proposed approach, both in terms of performance and condensation quality, are experimentally assessed on astronomical datasets related to the GAIA mission. It is concluded that the introduced technique might serve as a scalable method of alleviating the problem of the dataset size.
Źródło:
International Journal of Applied Mathematics and Computer Science; 2019, 29, 3; 467-476
1641-876X
2083-8492
Pojawia się w:
International Journal of Applied Mathematics and Computer Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Recognition of handwritten Latin characters with diacritics using CNN
Autorzy:
Lukasik, Edyta
Charytanowicz, Małgorzata
Milosz, Marek
Tokovarov, Michail
Kaczorowska, Monika
Czerwinski, Dariusz
Zientarski, Tomasz
Powiązania:
https://bibliotekanauki.pl/articles/2090714.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
handwritten documents
diacritic
neural networks
character recognition
deep learning
dokument odręczny
znaki diakrytyczne
sieci neuronowe
rozpoznawanie znaków
głęboka nauka
Opis:
Convolutional Neural Networks (CNN) have achieved huge popularity in solving problems in image analysis and in text recognition. In this work, we assess the effectiveness of CNN-based architectures where a network is trained in recognizing handwritten characters based on Latin script. European languages such as Dutch, French, German, etc., use different variants of the Latin script, so in the conducted research, the Latin alphabet was extended by certain characters with diacritics used in Polish language. To evaluate the recognition results under the same conditions, a handwritten Latin dataset was also developed. The proposed CNN architecture produced an accuracy of 96% for the extended character set. This is comparable to state-of-the-art results found in the domain of identifying handwritten characters. The presented approach extends the usage of CNN-based recognition to different variants of the Latin characters and shows it can be successfully used for a set of languages based on that script. It seems to be an effective technique for a set of languages written using the Latin script.
Źródło:
Bulletin of the Polish Academy of Sciences. Technical Sciences; 2021, 69, 1; e136210, 1--12
0239-7528
Pojawia się w:
Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Recognition of handwritten Latin characters with diacritics using CNN
Autorzy:
Lukasik, Edyta
Charytanowicz, Małgorzata
Milosz, Marek
Tokovarov, Michail
Kaczorowska, Monika
Czerwinski, Dariusz
Zientarski, Tomasz
Powiązania:
https://bibliotekanauki.pl/articles/2173581.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
handwritten documents
diacritic
neural networks
character recognition
deep learning
dokument odręczny
znaki diakrytyczne
sieci neuronowe
rozpoznawanie znaków
głęboka nauka
Opis:
Convolutional Neural Networks (CNN) have achieved huge popularity in solving problems in image analysis and in text recognition. In this work, we assess the effectiveness of CNN-based architectures where a network is trained in recognizing handwritten characters based on Latin script. European languages such as Dutch, French, German, etc., use different variants of the Latin script, so in the conducted research, the Latin alphabet was extended by certain characters with diacritics used in Polish language. To evaluate the recognition results under the same conditions, a handwritten Latin dataset was also developed. The proposed CNN architecture produced an accuracy of 96% for the extended character set. This is comparable to state-of-the-art results found in the domain of identifying handwritten characters. The presented approach extends the usage of CNN-based recognition to different variants of the Latin characters and shows it can be successfully used for a set of languages based on that script. It seems to be an effective technique for a set of languages written using the Latin script.
Źródło:
Bulletin of the Polish Academy of Sciences. Technical Sciences; 2021, 69, 1; art. no. e136210
0239-7528
Pojawia się w:
Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-5 z 5

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