Search results for: Konrad Wojciechowski

Items from 1 to 20 out of 32 results

article

Charge Extraction in Flexible Perovskite Solar Cell Architectures for Indoor Applications – with up to 31% Efficiency

Cristina Teixeira, Pierpaolo Spinelli, Luigi Angelo Castriotta, David Müller, more

Advanced Functional Materials > 32 > 40 > n/a - n/a

Perovskite Solar Cells (PSCs) are well known for their high efficiencies under 1 sun (AM1.5G), however, PSC can also generate power by harvesting the low‐light available indoors. Here, three flexible PSC architectures are presented for indoor applications: with a metal electrode aiming for high efficiency; carbon electrode aiming for high stability and compatibility with large‐scale production; and...

article

New Fullerene Derivative as an n‐Type Material for Highly Efficient, Flexible Perovskite Solar Cells of a p‐i‐n Configuration

Taimoor Ahmad, Barbara Wilk, Eros Radicchi, Rosinda Fuentes Pineda, more

Advanced Functional Materials > 30 > 45 > n/a - n/a

Metal halide perovskites have raised huge excitement in the field of emerging photovoltaic technologies. The possibility of fabricating perovskite solar cells (PSCs) on lightweight, flexible substrates, with facile processing methods, provides very attractive commercial possibilities. Nevertheless, efficiency values for flexible devices reported in the literature typically fall short in comparison...

article

Calibrated and synchronized multi-view video and motion capture dataset for evaluation of gait recognition

Bogdan Kwolek, Agnieszka Michalczuk, Tomasz Krzeszowski, Adam Switonski, more

Multimedia Tools and Applications > 2019 > 78 > 22 > 32437- 32465

We introduce synchronized and calibrated multi-view video and motion capture dataset for motion analysis and gait identification. The 3D gait dataset consists of 166 data sequences with 32 people. In 128 data sequences, each of 32 individuals was dressed in his/her clothes, in 24 data sequences, 6 of 32 performers changed clothes, and in 14 data sequences, 7 of the performers had a backpack on his/her...

article

Dynamic time warping in classification and selection of motion capture data

Adam Switonski, Henryk Josinski, Konrad Wojciechowski

Multidimensional Systems and Signal Processing > 2019 > 30 > 3 > 1437-1468

The paper is a comprehensive study on classification of motion capture data on the basis of dynamic time warping (DTW) transform. It presents both theoretical description of all applied and newly proposed methods and experimentally obtained results on real dataset of human gait with 436 samples of 30 males. The recognition is carried out by the classical DTW nearest neighbors classifier and introduced...

article

Evidence of Nitrogen Contribution to the Electronic Structure of the CH₃NH₃PbI₃ Perovskite

Małgorzata Kot, Konrad Wojciechowski, Henry Snaith, Dieter Schmeißer

Chemistry – A European Journal > 24 > 14 > 3539 - 3544

Despite fast development of hybrid perovskite solar cells, there are many fundamental questions related to the perovskite film which remain open. For example, there are contradicting theoretical reports on the role of the organic methylammonium cation (CH₃NH₃⁺) in the methylammonium lead triiodide (CH₃NH₃PbI₃) perovskite film. From one side it is reported that the organic cation does not contribute...

article

Room temperature atomic layer deposited Al2O3 on CH3NH3PbI3 characterized by synchrotron-based X-ray photoelectron spectroscopy

Małgorzata Kot, Chittaranjan Das, Karsten Henkel, Konrad Wojciechowski, more

Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions... > 2017 > 411 > C > 49-52

An ultrathin Al₂O₃ film deposited on methylammonium lead triiodide (CH₃NH₃PbI₃) perovskite has the capability to suppress the carrier recombination process and improve the perovskite solar cells efficiency and stability. However, annealing at temperatures higher than 85°C degrades the CH₃NH₃PbI₃ perovskite film. The X-ray photoelectron spectroscopy study performed in this work indicates that it is...

article

REmote SUpervision to Decrease HospitaLization RaTe. Unified and integrated platform for data collected from devices manufactured by different companies: Design and rationale of the RESULT study

Mateusz Tajstra, Adam Sokal, Arkadiusz Gwóźdź, Marcin Wilczek, more

Annals of Noninvasive Electrocardiology > 22 > 4 > n/a - n/a

The number of patients with heart failure implantable cardiac electronic devices (CIEDs) is growing. Hospitalization rate in this group is very high and generates enormous costs. To avoid the need for hospital treatment, optimized monitoring and follow‐up is crucial. Remote monitoring (RM) has been widely put into practice in the management of CIEDs but it may be difficult due to the presence of differences...

chapter

The overview of automatically supported gait analysis methods for medical diagnoses and rehabilitation

Agnieszka Michalczuk, Kamil Wereszczynski, Adam Switonski, Henryk Josinski, more

IEEE EUROCON 2017 -17th International Conference on Smart Technologies > 550 - 554

IEEE EUROCON 2017 -17th International Conference on Smart Technologies

In this paper we present a review of gait analysis methods used for medical applications. First of all, we introduce a system of real-time gait acquisition. Next, three ways of gait data representation: trajectories, Euler angles and medical angles are described along with the most promising methods of gait analysis based on those representations like gait indices, Dynamic Time Warping, manifold methods...

article

Efficient and Air‐Stable Mixed‐Cation Lead Mixed‐Halide Perovskite Solar Cells with n‐Doped Organic Electron Extraction Layers

Zhiping Wang, David P. McMeekin, Nobuya Sakai, Stephan van Reenen, more

Advanced Materials > 29 > 5 > n/a - n/a

Air‐stable doping of the n–type fullerene layer in an n–i–p planar heterojunction perovskite device is capable of enhancing device efficiency and improving device stability. Employing a (HC(NH₂)₂)_0.83Cs_0.17Pb(I_0.6Br_0.4)₃ perovskite as the photoactive layer, glass–glass laminated devices are reported, which sustain 80% of their “post burn‐in” efficiency over 3400 h under full sun illumination in ambient...

article

Inertial Motion Capture Costume

Agnieszka Szczęsna, Przemysław Pruszowski, Przemysław Skurowski, Ewa Lach, more

Procedia Technology > 2017 > 27 > C > 139-140

The need to measure human motion and to estimate its kinematic and dynamic parameters in a real time appears in many fields such as medicine, sport, art and entertainment. This publication describes, inexpensive and easy to customize for many applications, Inertial Motion Capture Costume. The costume is based on IMU sensors and includes industry grade software that enables acquisition, visualization...

chapter

Three Cameras Method of Light Sources Extraction in Augmented Reality

Przemysław Wiktor Pardel, Konrad Wojciechowski

Lecture Notes in Computer Science > Computer Vision and Graphics > Computer Vision and Graphics > 183-192

Transmission information of light sources is very important part of Augmented Reality (AR) system. Most essential aspects to make virtual objects look like real ones is lighting. To calculate adequate shadows it is necessary to know the position and shape of all light sources in the real scene. It is necessary to collect image of real environment for knowledge of geometry and information about position...

chapter

Swarm Intelligence Based Searching Schemes for Articulated 3D Body Motion Tracking

Bogdan Kwolek, Tomasz Krzeszowski, Konrad Wojciechowski

Lecture Notes in Computer Science > Advanced Concepts for Intelligent Vision Systems > Classification, Recognition and Tracking > 115-126

We investigate swarm intelligence based searching schemes for effective articulated human body tracking. The fitness function is smoothed in an annealing scheme and then quantized. This allows us to extract a pool of candidate best particles. The algorithm selects a global best from such a pool. We propose a global-local annealed particle swarm optimization to alleviate the inconsistencies between...

chapter

Real-Time Multi-view Human Motion Tracking Using 3D Model and Latency Tolerant Parallel Particle Swarm Optimization

Bogdan Kwolek, Tomasz Krzeszowski, Konrad Wojciechowski

Lecture Notes in Computer Science > Computer Vision/Computer Graphics Collaboration Techniques > 169-180

This paper demonstrates how latency tolerant parallel particle swarm optimization can be used to achieve real-time full-body motion tracking. The tracking is realized using multi-view images and articulated 3D model with a truncated cones-based representation of the body. Each CPU core computes fitness score for a single camera. On each node the algorithm uses the current temporary best fitness value...

chapter

Articulated Body Motion Tracking by Combined Particle Swarm Optimization and Particle Filtering

Tomasz Krzeszowski, Bogdan Kwolek, Konrad Wojciechowski

Lecture Notes in Computer Science > Computer Vision and Graphics > Human Motion Analysis and Synthesis > 147-154

This paper proposes the use of a particle filter with embedded particle swarm optimization as an efficient and effective way of dealing with 3d model-based human body tracking. A particle swarm optimization algorithm is utilized in the particle filter to shift the particles toward more promising configurations of the human model. The algorithm is shown to be able of tracking full articulated body...

chapter

Matlab Based Interactive Simulation Program for 2D Multisegment Mechanical Systems

Henryk Josiński, Adam Świtoński, Karol Jędrasiak, Andrzej Polański, more

Lecture Notes in Computer Science > Computer Vision and Graphics > Human Motion Analysis and Synthesis > 131-138

This paper presents principles of designing multisegment mechanical system. Represented is a model of a single segment, its extension in form of a couple of segments and the final construction – a fragmentary and simplified silhouette of a human form named the biped. This paper describes procedure of construction of the biped’s digital model using Matlab package. It also discusses test run of a single...

chapter

GPU-Accelerated Tracking of the Motion of 3D Articulated Figure

Tomasz Krzeszowski, Bogdan Kwolek, Konrad Wojciechowski

Lecture Notes in Computer Science > Computer Vision and Graphics > Human Motion Analysis and Synthesis > 155-162

This paper presents methods that utilize the advantages of modern graphics card hardware for real-time full body tracking with a 3D body model. By means of the presented methods the tracking of full body can be performed at frame-rates of 5 frames per second using a single low-cost moderately-priced graphics card and images from single camera. For a model with 26 DOF we achieved 15 times speed-up...

chapter

Fast Detection and Impulsive Noise Attenuation in Color Images

Bogdan Smolka, Andrzej Chydzinski, Konrad Wojciechowski

Advances in Intelligent and Soft Computing > Computer Recognition Systems > Image Processing and Computer Vision > 459-466

In this paper a novel approach to the impulsive noise removal in color images is presented. The proposed technique employs the switching scheme based on the impulse detection mechanism using the so called peer group concept. Compared to the vector median filter, the proposed technique consistently yields better results in suppressing both the random-valued and fixed-valued impulsive noise. The main...

chapter

Human Identification Based on Gait Paths

Adam Świtoński, Andrzej Polański, Konrad Wojciechowski

Lecture Notes in Computer Science > Advanced Concepts for Intelligent Vision Systems > Video Surveillance and Biometrics > 531-542

Gait paths are spatial trajectories of selected body points during person’s walk. We have proposed and evaluated features extracted from gait paths for the task of person identification. We have used the following gait paths: skeleton root element, feet, hands and head. In our motion capture laboratory we have collected human gait database containing 353 different motions of 25 actors. We have proposed...

chapter

Detection of Tumor Tissue Based on the Multispectral Imaging

Adam Świtoński, Marcin Michalak, Henryk Josiński, Konrad Wojciechowski

Lecture Notes in Computer Science > Computer Vision and Graphics > Computer Vision and Graphics > 325-333

We have prepared multispectral image database of skin tumor diagnosis. All images have been labeled with two classes - tumor and healthy tissues. We have extracted pixel signatures with their spectral data and class assigning, thus obtained train dataset. Next we have used and evaluated the supervised learning techniques for the purpose of automatic tumor detection. We have tested Naive Bayes, KNN,...

chapter

Classification of Poses and Movement Phases

Adam Świtoński, Henryk Josiński, Karol Jędrasiak, Andrzej Polański, more

Lecture Notes in Computer Science > Computer Vision and Graphics > Human Motion Analysis and Synthesis > 193-200

We have focused on the problem of classification of motion frames representing different poses by supervised machine learning and dimensionality reduction techniques. We have extracted motion frames from global database manually, divided them into six different classes and applied classifiers to automatic pose type detection. We have used statistical Bayes, neural network, random forest and Kernel...

Publication date

Last 3 years (1)

Close

Date range setting

Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.

From:

To:
Set your own date range

Content availability

Available (29)
None (3)

Publication type

book (21)
article (11)

Keywords

PEROVSKITE SOLAR CELLS (5)
BIOMETRICS (3)
MOTION CAPTURE (3)
DYNAMIC TIME WARPING (2)
GAIT RECOGNITION (2)
IMAGE EDGE DETECTION (2)
LATTICES (2)
NOISE (2)
PEDOT (2)
PEROVSKITE (2)
SURFACE ACOUSTIC WAVES (2)
AL2O3 (1)
ANIMATION (1)
ARTICULATED SYSTEM (1)
ATOMIC LAYER DEPOSITION (1)
CARBON ELECTRODES (1)
CH3NH3PBI3 (1)
CONTACT (1)
COUNTER‐ELECTRODE (1)
COVARIATE FACTORS (1)
CUSCN (1)
DIGITAL IMAGES (1)
DIMENSIONALITY REDUCTION (1)
DOPING (1)
DYNAMICS (1)
ELECTRON TRANSPORT MATERIALS (1)
ELECTRONIC STRUCTURE (1)
EULER ANGLES (1)
FEATURE EXTRACTION (1)
FEATURES EXTRACTION (1)
FEATURES SELECTION (1)
FILMS (1)
FLEXIBLE (1)
FLEXIBLE SOLAR CELLS (1)
FLEXIBLE SUBSTRATES (1)
FULLERENE DERIVATIVE (1)
GAIT ANALYSIS (1)
GAIT IDENTIFICATION (1)
GAIT INDEX (1)
GRASSMANN MANIFOLD (1)
HEART FAILURE (1)
HOLE TRANSPORTING MATERIAL (1)
HUMAN IDENTIFICATION (1)
HYSTERESIS (1)
IMAGE ENHANCEMENT (1)
IMAGE SEGMENTATION (1)
IMU SENSOR (1)
INDEXES (1)
INDOOR PHOTOVOLTAICS (1)
INERTIAL MOTION CAPTURE (1)
INK‐JET (1)
INTEGRATED PLATFORM (1)
KALMAN FILTER (1)
LONG‐TERM STABILITY (1)
MANIFOLD LEARNING (1)
MANIFOLDS (1)
MARKERLESS 3D TRACKING (1)
METALS (1)
MIXED‐CATION MIXED‐HALIDE (1)
ORIENTATION (1)
PEROVSKITES (1)
PHOTOVOLTAIC CELLS (1)
PHOTOVOLTAIC SYSTEMS (1)
POWER CONVERSION (1)
RANKING OF JOINTS (1)
REMOTE MONITORING (1)
RESONANT X-RAY PHOTOELECTRON SPECTROSCOPY (1)
RESULT STUDY (1)
RIGID BODIES (1)
SKELETON (1)
SMOOTHING METHODS (1)
SOFTWARE (1)
SPIRO-OMETAD (1)
STANDARDS (1)
SUPERVISED LEARNING (1)
SYNCHROTRON-BASED X-RAY PHOTOELECTRON SPECTROSCOPY (1)
SYSTEM HIERARCHY (1)
THREE-DIMENSIONAL DISPLAYS (1)
TRAJECTORY (1)
TRANSPARENT (1)
UNIT QUATERNIONS (1)
more

Data set

Springer (18)
Wiley (6)
ieee (5)
Elsevier (2)
DML (1)

INFONA - science communication portal

Search results for: Konrad Wojciechowski

Charge Extraction in Flexible Perovskite Solar Cell Architectures for Indoor Applications – with up to 31% Efficiency

New Fullerene Derivative as an n‐Type Material for Highly Efficient, Flexible Perovskite Solar Cells of a p‐i‐n Configuration

Calibrated and synchronized multi-view video and motion capture dataset for evaluation of gait recognition

Dynamic time warping in classification and selection of motion capture data

Evidence of Nitrogen Contribution to the Electronic Structure of the CH₃NH₃PbI₃ Perovskite

Room temperature atomic layer deposited Al2O3 on CH3NH3PbI3 characterized by synchrotron-based X-ray photoelectron spectroscopy

REmote SUpervision to Decrease HospitaLization RaTe. Unified and integrated platform for data collected from devices manufactured by different companies: Design and rationale of the RESULT study

The overview of automatically supported gait analysis methods for medical diagnoses and rehabilitation

Efficient and Air‐Stable Mixed‐Cation Lead Mixed‐Halide Perovskite Solar Cells with n‐Doped Organic Electron Extraction Layers

Inertial Motion Capture Costume

Three Cameras Method of Light Sources Extraction in Augmented Reality

Swarm Intelligence Based Searching Schemes for Articulated 3D Body Motion Tracking

Real-Time Multi-view Human Motion Tracking Using 3D Model and Latency Tolerant Parallel Particle Swarm Optimization

Articulated Body Motion Tracking by Combined Particle Swarm Optimization and Particle Filtering

Matlab Based Interactive Simulation Program for 2D Multisegment Mechanical Systems

GPU-Accelerated Tracking of the Motion of 3D Articulated Figure

Fast Detection and Impulsive Noise Attenuation in Color Images

Human Identification Based on Gait Paths

Detection of Tumor Tissue Based on the Multispectral Imaging

Classification of Poses and Movement Phases

Filter options

Publication date

Content availability

Publication type

Keywords

Data set

Journal

INFONA - science communication portal

Search results for: Konrad Wojciechowski

Add recipient

Sending message cancelled

Are you sure you want to cancel sending this message?

Send message

Filter options

Publication date

Date range setting

Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.

Content availability

Publication type

Keywords

Data set

Journal

Reporting an error / abuse

Sending the report failed

Accessibility options