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Search results for: FACE MILLING
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Universities in a knowledge-based society - their role and challenges they have to face
PublicationArtykuł opisuje rolę instytucji edukacyjnych wraz z problemami i wyzwaniami, którym muszę one sprostać w gospodarce opartej na wiedzy.
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The new face of safeguarding and promotion of the intangible cultural heritage in Poland
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Face detection in image sequences using a portable thermal camera
PublicationFace detection is often a first step in quantitative analysis of face images. It is an important research area for visible images and recently also for thermography. Due to technological developments thermal cameras may be embedded into wearable devices to provide remote healthcare. In this paper, we compared three algorithms for face detection in thermal images by testing execution time, accuracy, symmetry ratio and false-positives....
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The accuracy of pulse rate estimation from the sequence of face images
PublicationThe goal of this paper is to analyze the accuracy of pulse rate estimation from the sequence of face images. Simulated and real signals were used to evaluate two pulse rate estimators; one for frequency domain and the second one for time domain using the autocorrelation function. The results show that the mean difference between the reference measurements and estimated pulse rate values are about 2bpm. In the analysis of short...
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Variable length sliding models for banking clients face biometry
PublicationAn experiment was organized in 100 bank branches to acquire biometric samples from nearly 5000 clients including face images. A procedure for creating face verification models based on continuously expanding database of biometric samples is proposed, implemented, and tested. The presented model applies to circumstances where it is possible to collect and to take into account new biometric samples after each positive verification...
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Gdynia's Modernism between the World Wars. The Stylistic Face of the Epoch
PublicationThe article presents the styles in the architecture of Gdynia in 1920s and 1930s
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Local Texture Pattern Selection for Efficient Face Recognition and Tracking
PublicationThis paper describes the research aimed at finding the optimal configuration of the face recognition algorithm based on local texture descriptors (binary and ternary patterns). Since the identification module was supposed to be a part of the face tracking system developed for interactive wearable computer, proper feature selection, allowing for real-time operation, became particularly important. Our experiments showed that it is...
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Evaluation of Face Detection Algorithms for the Bank Client Identity Verification
PublicationResults of investigation of face detection algorithms efficiency in the banking client visual verification system are presented. The video recordings were made in real conditions met in three bank operating outlets employing a miniature industrial USB camera. The aim of the experiments was to check the practical usability of the face detection method in the biometric bank client verification system. The main assumption was to provide...
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A Mechatronic Procedure of Vibration Surveillance During Milling of a Flexible Workpiece
PublicationArtykuł prezentuje mechatroniczne podejście do nadzorowania drgań podczas obróbki szybkościowej przedmiotów podatnych z wykorzystaniem aktywnego sterowania optymalnego. Układ sterowania składa się z aktywych wzbudników piezoelektrycznych przymocowanych do przedmiotu. Efektywnośc metody została potwierdzona symulacjami komputerowymi i badaniami eksperymentalnymi.
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Investigation on the edge forces in ball end milling of inclined surfaces
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Technological and tribological aspects of milling-burnishing process of complex surfaces
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Examination of tools of different materials edge geometry for MDF milling
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Vibration surveillance in modern milling machines by the spindle speed control.
PublicationPraca poświęcona jest nadzorowaniu drgań wirujących narzędzi w nowo-czesnych frezarkach. Polega ono na zastosowaniu sterowania programo-wego w układach niestacjonarnych. Dotyczy to zamkniętych układów obra-biarek, kiedy to istotną rolę odgrywają drgania samowzbudne typu chat-ter. Sygnałem sterującym jest chwilowa zmiana prędkości obrotowej. Rozważano frezowanie czołowe smukłym frezem trzpieniowym na pionowym centrum frezarskim....
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Tool-workpiece vibration surveillance during slender end milling.
PublicationPraca poświęcona jest nowemu podejściu do nadzorowania drgań wirujących narzędzi we współczesnych frezarkach. Polega ono na sterowaniu programowym w układach niestacjonarnych. Dotyczy zamkniętych układów obrabiarek, kiedy to istotną rolę odgrywają drgania samowzbudne typu chatter. Sygnałem sterującym jest chwilowa zmiana prędkości obrotowej wrzeciona. Rozważano frezowanie czołowe smukłym frezem trzpieniowym na pionowym centrum...
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The spindle speed control for high speed milling vibration surveillance
PublicationW pracy przedstawiono zmodyfikowaną metodę nadzorowania drgań za pomocą sterowania optymalno-liniowego prędkością obrotową wrzeciona. Zamieszczono opis dynamiki skrawania, niestacjonarnego modelu obliczeniowego oraz metody nadzorowania drgań. Wykorzystano model modalny wirującego narzędzia, którego parametry wyznaczono zarówno metodami symulacji komputerowych, jak i - za pomocą eksperymentalnej analizy modalnej. Zamieszczono przykład...
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Filling of carbon nanotubes for bio‐applications
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Proposed Amendments to Reactive Energy Billing
PublicationThis paper describes possible amendments to the rules of reactive energy billing in the tariffs in Poland. Modifications in the tariffs to improve their motivational function for distribution system users are identified as the most expedient. New problems arising from distributed generator operations are also indicated. A billing method that can be effectively implemented at the occurrence of distorted voltage and current waveforms...
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TIME to face the reality about evening dosing of antihypertensive drugs in hypertension
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Image-based Analysis of Emotional Facial Expressions in Full Face Transplants
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Deep Features Class Activation Map for Thermal Face Detection and Tracking
PublicationRecently, capabilities of many computer vision tasks have significantly improved due to advances in Convolutional Neural Networks. In our research, we demonstrate that it can be also used for face detection from low resolution thermal images, acquired with a portable camera. The physical size of the camera used in our research allows for embedding it in a wearable device or indoor remote monitoring solution for elderly and disabled...
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Image normalization method for face identification under difficult lighting conditions
PublicationW pracy przedstawiono nową metodę normalizacji obrazu, opartą o proste techniki, takie jak binaryzacja czy wyrównywanie histogramu, która pozwala na skuteczne wyeliminowanie cieni oraz uzyskanie niezmienników znacznie poprawiających dokładność procesu rozpoznawania twarzy. Podczas wykonanych eksperymentów zaproponowana metoda uzyskała wyniki lepsze od referencyjnego algorytmu wykorzystującego anizotropowe wygładzanie.
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Thermal and technological aspects of double face grinding of Al2O3 ceramic materials
PublicationDouble face grinding with planetary kinematics is a process to manufacture workpieces with plan parallel functional surfaces, such as bearing rings or sealing shims. In order to increase the economic efficiency of this process, it has to be advanced permanently. The temperature in the contact zone of most grinding processes has a huge influence on the process efficiency and the workpiece qualities. In contrast to most grinding...
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Face with Mask Detection in Thermal Images Using Deep Neural Networks
PublicationAs the interest in facial detection grows, especially during a pandemic, solutions are sought that will be effective and bring more benefits. This is the case with the use of thermal imaging, which is resistant to environmental factors and makes it possible, for example, to determine the temperature based on the detected face, which brings new perspectives and opportunities to use such an approach for health control purposes. The...
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Thermal and technological aspects of double face grinding of C45 carbon steel
PublicationIn grinding, the contact zone temperature is a decisive factor influencing the achievable surface quality and the grinding tool wear. In contrast to other grinding processes, only few information regarding double face grinding with planetary kinematics when processing steel is known up to date. Since the successive substitution of in-dustrial double-sided lapping processes by double-sided grinding, it has become necessary to the...
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Surface roughness analysis of hardened steel after high‐speed milling
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Cutting Forces and Vibrations During Ball End Milling of Inclined Surfaces
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Modeling of cutter displacements during ball end milling of inclined surfaces
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The application of response surface method to optimization of precision ball end milling
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The analysis of instantaneous tool displacements during precise ball end milling
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Machined Surface Roughness Including Cutter Displacements in Milling of Hardened Teel
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Vibration surveillance during milling of flexible details with a use of the optimal control
PublicationPraca dotyczy nadzorowania drgań podczas obróbki frezem kulistym zakrzywionych przedmiotów podatnych. Utworzono model hybrydowy niestacjonarnego układu drgającego i wydzielono podukłady: strukturalny, modalny oraz łączący. Istotnym zadaniem było utworzenie modelu przedmiotu podatnego w konwencji metody elementów skończonych oraz uzyskanie dobrej zgodności modelu z wynikami eksperymentalnej analizy modalnej obiektu rzeczywistego.
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Vibration surveilance during milling of flexible details with a use of the optimal control
PublicationPraca dotyczy nadzorowania drgań podczas często obserwowanego w przypadku nowoczesnych procesów obróbkowych frezowania przedmiotów podatnych smukłymi narzędziami. Sformułowano: macierzowe równanie dynamiki, energetyczny wskaźnik jakości i optymalny sygnał sterujący we współrzędnych hybrydowych. Przeprowadzono symulacje komputerowe procesu frezowania dla różnych parametrów modelu obliczeniowego i rożnych ścieżek narzędzia. Zaproponowano...
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Mechatronic design for the high speed milling surveillance of the complex and flexible details
PublicationW pracy przedstawiono mechatroniczny system tworzenia mapy optymalnych prędkości obrotowych wrzeciona. W trakcie frezowania szybkościowego przedmiotów podatnych mogą wystąpić drgania samowzbudne typu chatter. Używana zazwyczaj procedura ustawiania wymaganej prędkości obrotowej wrzeciona metodą prób i błędów, w wielu przypadkach nie jest zalecana. Przedstawiona procedura nadzorowania może doprowadzić do uniknięcia ryzyka wystąpienia...
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Vibration surveillance supported by Hardware-In-the-Loop Simulation in milling flexible workpieces
PublicationW artykule przedstawiono nowoczesne podejście do problemu minimalizacji poziomu drgań podczas frezowania szybkościowego elementów podatnych. Do analizy dynamicznej procesu skrawania zastosowano niestacjonarny model opisany we współrzędnych hybrydowych. Na tej podstawie, przy wykorzystaniu energetycznego wskaźnika jakości wyprowadzono opis sygnału sterującego. Sygnał ten jest następnie stosowany do aktywnej redukcji drgań przedmiotu...
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Vibration Surveillance System with Variable Stiffness Holder for Milling Flexible Details
PublicationEfficient milling of the flexible details (i.e. rotor blades, thin-walled elements) using slender ball-end tools is a difficult task due to possibility of vibration occurrence. Because of the existence of certain conditions (small depths of cutting, regeneration phenomena), cutting process may lose stability and self-excited chatter vibration may appear. Frequency of the chatter vibration is close to dominant natural frequency...
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High speed milling vibration surveillance using modal model of the tool
PublicationPraca poświęcona jest nadzorowaniu drgań wirujących narzędzi w nowoczesnych frezarkach. Przedmiotem rozważań jest proces frezowania szybkościowego smukłym frezem kulistym na 5-osiowym centrum obróbkowym Deckel Maho DMU 50eVolution. Frezowanie smukłymi narzędziami jest często stosowane w przypadku nowoczesnych centrów obróbkowych. Uzasadnienie technologiczne wynika z konieczności dokładnego wykonywania złożonych kształtów geometrycznych...
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Modelling and Simulation of a New Variable Stiffness Holder for Milling of Flexible Details
PublicationModern industry expectations in terms of milling operations often demand the milling of the flexible details by using slender ball-end tools. This is a difficult task because of possible vibration occurrence. Due to existence of certain conditions (small depths of cutting, regeneration phenomena), cutting process may become unstable and self-excited chatter vibration may appear. Frequency of the chatter vibration is close to dominant...
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The Method of Finding the Optimal Spindle Speed When Milling Flexible Details
PublicationThe paper presents a new method of vibration reduction during milling of flexible details. The method consists in selecting the optimal spindle speed, based on the natural frequency of the workpiece. For this purpose, an original method was created, which is based on minimizing the work of cutting forces in the direction of the depth of cutting. The effectiveness of the method has been proved by comparing the RMS values of vibration...
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Reactive Energy Billing in Operator Tariffs in Poland
PublicationThe paper describes the current method of reactive energy billing in the tariffs of distribution grid operators in Poland. The current solutions are subject to critical assessment. Issues related to the motivation effect of the current solutions on consumers are analysed. Problems that occur in relation with connecting distributed generators to the distribution grid and challenges related to prosumer billing are indicated.
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Million dollar algorithn?
PublicationArtykuł w sposób popularnonaukowy porusza następujące problemy:- 2300 lat algorytmiki- 7 problemów milenijnych- rodzaje problemów pod kątem złożoności obliczeniowej- planowanie optymalne- banki i grafy- czy P=NP?
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INTELLECTUALS IN THE FACE OF HISTORIC TURMOIL: “THE REVENGE OF THE PRINTER” BY STANISLAV ROSOVETSKYJ AS ACADEMIC FICTION
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Molecular Diagnosis of COVID-19 Sudden and Unexplained Deaths: The Insidious Face of the Pandemic
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THE IMPACT OF EMOTIONS ON CHANGES IN THE CORRELATION COEFFICIENT BETWEEN DIGITAL IMAGES OF THE HUMAN FACE
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Face Profile View Retrieval Using Time of Flight Camera Image Analysis
PublicationMethod for profile view retrieving of the human face is presented. The depth data from the 3D camera is taken as an input. The preprocessing is, besides of standard filtration, extended by the process of filling of the holes which are present in depth data. The keypoints, defined as the nose tip and the chin are detected in user’s face and tracked. The Kalman filtering is applied to smooth the coordinates of those points which...
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A new method of presosns identification based on comparative analysis of 3D face models
PublicationThe article presents the use of modern close range photogrammetry for possessing highly accurate 3D models of the human face (including the ears). Modern methods used to obtain precise data describing the construction of a human face, and even the whole human body, should allow to get finished measurement material in a very short time. Those features belong to the optical scanning technology. Comparative analysis of models of the...
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Influence of Thermal Imagery Resolution on Accuracy of Deep Learning based Face Recognition
PublicationHuman-system interactions frequently require a retrieval of the key context information about the user and the environment. Image processing techniques have been widely applied in this area, providing details about recognized objects, people and actions. Considering remote diagnostics solutions, e.g. non-contact vital signs estimation and smart home monitoring systems that utilize person’s identity, security is a very important factor....
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Impact of Shifting Time-Window Post-Processing on the Quality of Face Detection Algorithms
PublicationWe consider binary classification algorithms, which operate on single frames from video sequences. Such a class of algorithms is named OFA (One Frame Analyzed). Two such algorithms for facial detection are compared in terms of their susceptibility to the FSA (Frame Sequence Analysis) method. It introduces a shifting time-window improvement, which includes the temporal context of frames in a post-processing step that improves the...
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Database of speech and facial expressions recorded with optimized face motion capture settings
PublicationThe broad objective of the present research is the analysis of spoken English employing a multiplicity of modalities. An important stage of this process, discussed in the paper, is creating a database of speech accompanied with facial expressions. Recordings of speakers were made using an advanced system for capturing facial muscle motion. A brief historical outline, current applications, limitations and the ways of capturing face...
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Actualidad Contable Faces
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Critical Philosophy of Race
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