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Wyświetlanie 1-15 z 33
Tytuł:
CMOS realisation of analogue processor for early vision processing
Autorzy:
Jendernalik, W.
Jakusz, J.
Blakiewicz, G.
Piotrowski, R.
Szczepański, S.
Powiązania:
https://bibliotekanauki.pl/articles/202320.pdf
Data publikacji:
2011
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
CMOS imager
analogue processor array
smart sensor
vision chip
Opis:
The architecture concept of a high-speed low-power analogue vision chip, which performs low-level real-time image algorithms is presented. The proof-of-concept prototype vision chip containing 32 �~ 32 photosensor array and 32 analogue processors is fabricated using a 0.35 mikrom CMOS technology. The prototype can be configured to register and process images with very high speed, reaching 2000 frames per second, or achieve very low power consumption, several mikroW. Finally, the experimental results are presented and discussed.
Źródło:
Bulletin of the Polish Academy of Sciences. Technical Sciences; 2011, 59, 2; 141-147
0239-7528
Pojawia się w:
Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analogue CMOS ASICs in image processing systems
Autorzy:
Jendernalik, W.
Blakiewicz, G.
Handkiewicz, A.
Melosik, M.
Powiązania:
https://bibliotekanauki.pl/articles/221661.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
analog CMOS circuits
early vision processing
switched current filters
Opis:
In this paper a survey of analog application specific integrated circuits (ASICs) for low-level image processing, called vision chips, is presented. Due to the specific requirements, the vision chips are designed using different architectures best suited to their functions. The main types of the vision chip architectures and their properties are presented and characterized on selected examples of prototype integrated circuits (ICs) fabricated in complementary metal oxide semiconductor (CMOS) technologies. While discussing the vision chip realizations the importance of low-cost, low-power solutions is highlighted, which are increasingly being used in intelligent consumer equipment. Thanks to the great development of the automated design environments and fabrication methods, new, so far unknown applications of the vision chips become possible, as for example disposable endoscopy capsules for photographing the human gastrointestinal tract for the purposes of medical diagnosis.
Źródło:
Metrology and Measurement Systems; 2013, 20, 4; 613-622
0860-8229
Pojawia się w:
Metrology and Measurement Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
CMOS implementation of an analogue median filter for image processing in real time
Autorzy:
Jendernalik, W.
Jakusz, J.
Blakiewicz, G.
Szczepański, S.
Powiązania:
https://bibliotekanauki.pl/articles/202129.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
analogue CMOS circuits
early vision processing
median filter
low-power
Opis:
An analogue median filter, realised in a 0.35 μm CMOS technology, is presented in this paper. The key advantages of the filter are: high speed of image processing (50 frames per second), low-power operation (below 1.25 mW under 3.3 V supply) and relatively high accuracy of signal processing. The presented filter is a part of an integrated circuit for image processing (a vision chip), containing: a photo-sensor matrix, a set of analogue pre-processors, and interface circuits. The analysis of the main parameters of the considered median filter is presented. The discussion of important limitations in the operation of the filter due to the restrictions imposed by CMOS technology is also presented.
Źródło:
Bulletin of the Polish Academy of Sciences. Technical Sciences; 2013, 61, 3; 725-730
0239-7528
Pojawia się w:
Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Research on the characteristics of traffic ow with the use of video registration
Autorzy:
Celiński, I.
Powiązania:
https://bibliotekanauki.pl/articles/393633.pdf
Data publikacji:
2014
Wydawca:
Polskie Stowarzyszenie Telematyki Transportu
Tematy:
image processing
vision processing
road network
video registration
traffic detection
przetwarzanie obrazów
system wizyjny
sieć dróg
wideorejestracja
wykrywanie ruchu
Opis:
The article outlines the video registration method as well as research based on obtained video footage of the characteristics of traffic flow. The method is flexible and makes it possible to research various traffic characteristics. The article presents the method’s assumptions and the manner in which traffic flow characteristics were measured. The method of registering traffic flow parameters on video was implemented in 2012 in selected sections of Katowice’s road network. An important feature is the possibility of traffic flow parameterization with the use of popular camcorders. The thus-obtained footage is processed using so-called open library vision graphics procedures in order to establish traffic flow characteristics in near real-time.
Źródło:
Archives of Transport System Telematics; 2014, 7, 1; 3-8
1899-8208
Pojawia się w:
Archives of Transport System Telematics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Current research opportunities for image processing and computer vision
Autorzy:
Gupta, Abhishek
Powiązania:
https://bibliotekanauki.pl/articles/305319.pdf
Data publikacji:
2019
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
computer vision
image processing
imaging applications
opportunities
challenges
application
Opis:
Image processing and computer vision is an important and essential area in today’s scenario. Several problems can be solved through computer vision techniques. There are a large number of challenges and opportunities which require skills in the field of computer vision to address them. Computer vision applications cover each band of the electromagnetic spectrum and there are numerous applications in every band. This article is targeted to the research students, scholars and researchers who are interested to solve the problems in the field of image processing and computer vision. It addresses the opportunities and current trends of computer vision applications in all emerging domains. The research needs are identified through available literature survey and classified in the corresponding domains. The possible exemplary images are collected from the different repositories available for research and shown in this paper. The opportunities mentioned in this paper are explained through the images so that a naive researcher can understand it well before proceeding to solve the corresponding problems. The databases mentioned in this article could be useful for researchers who are interested in further solving the problem. The motivation of the article is to expose the current opportunities in the field of image processing and computer vision along with corresponding repositories. Interested researchers who are working in the field can choose a problem through this article and can get the experimental images through the cited references for working further.
Źródło:
Computer Science; 2019, 20 (4); 387-410
1508-2806
2300-7036
Pojawia się w:
Computer Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Integration of vision based image processing for multi-axis CNC machine tool safe and efficient trajectory generation and collision avoidance
Autorzy:
Ahmad, R.
Tichadou, S.
Hascoet, J.-Y.
Powiązania:
https://bibliotekanauki.pl/articles/99898.pdf
Data publikacji:
2010
Wydawca:
Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych
Tematy:
trajectory generation
object detection
object identification
multi-axis machines
collision avoidance
Opis:
Demand of high speed production not only increases the complexity of today's CNC process, but also increases the risks and possibility of collision because of the difference between real (machining) and virtual scenes (CAD/CAM process). Idea here is to make this process more intelligent by processing image taken from the real or virtual machine scenes. Identify objects (already known in the CAD database), obtain safe and efficient trajectories that will modify the previous known trajectories from the CAM systems and will be used finally in real machining environments. This work more focuses to improve trajectory generation, collision avoidance and communication in CAD/CAM systems by image processing technique. Safe and Efficient Trajectory (SET) algorithm for point trajectory is discussed along with its extended version for object trajectory known as Rectangular Enveloped object Safe and Efficient Trajectory (RESET) algorithm that will perfectly generate safe un-functional trajectories [3] for multi-axis machine tool envelop. Meanwhile scene objects are detected and identified by image processing tool while trajectory and setup is optimized and improved accordingly in order to avoid collision. This generated trajectory can be used for setup correction before and after production or for "real times/online" production. Finally work has been validated through real and virtual machine scene images.
Źródło:
Journal of Machine Engineering; 2010, 10, 4; 53-65
1895-7595
2391-8071
Pojawia się w:
Journal of Machine Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Enhanced of Tool Management Based on Machine Vision in the Field of Metal Forming Technology
Autorzy:
Świłło, Sławomir
Cacko, Robert
Powiązania:
https://bibliotekanauki.pl/articles/2174595.pdf
Data publikacji:
2022
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
die
aluminium extrusion
tool management
machine vision
digital image processing
Opis:
In this article, the authors focused on the widely used aluminium extrusion technology, where the die quality and durability are the essential factors. In this study, detailed solutions in the three-key area have been presented. First is applying marking technology, where a laser technique was proposed as a consistent light source of high power in a selected, narrow spectral range. In the second, an automated and reliable identification method of alphanumeric characters was investigated using an advanced machine vision system and digital image processing adopted to the industrial conditions. Third, a proposed concept of online tool management was introduced as an efficient process for properly planning the production process, cost estimation and risk assessment. In this research, the authors pay attention to the designed vision system’s speed, reliability, and mobility. This leads to the practical, industrial application of the proposed solutions, where the influence of external factors is not negligible.
Źródło:
Archives of Metallurgy and Materials; 2022, 67, 4; 1419--1425
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Surface casting defects inspection using vision system and neural network techniques
Autorzy:
Świłło, S. J.
Perzyk, M.
Powiązania:
https://bibliotekanauki.pl/articles/380699.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
nondestructive testing
machined aluminum die castings
image processing algorithms
vision system inspection
neural network
badanie nieniszczące
odlewnictwo ciśnieniowe
algorytm przetwarzania obrazu
inspekcja wizyjna
sieć neuronowa
Opis:
The paper presents a vision based approach and neural network techniques in surface defects inspection and categorization. Depending on part design and processing techniques, castings may develop surface discontinuities such as cracks and pores that greatly influence the material’s properties Since the human visual inspection for the surface is slow and expensive, a computer vision system is an alternative solution for the online inspection. The authors present the developed vision system uses an advanced image processing algorithm based on modified Laplacian of Gaussian edge detection method and advanced lighting system. The defect inspection algorithm consists of several parameters that allow the user to specify the sensitivity level at which he can accept the defects in the casting. In addition to the developed image processing algorithm and vision system apparatus, an advanced learning process has been developed, based on neural network techniques. Finally, as an example three groups of defects were investigated demonstrates automatic selection and categorization of the measured defects, such as blowholes, shrinkage porosity and shrinkage cavity.
Źródło:
Archives of Foundry Engineering; 2013, 13, 4; 103-106
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Perceptual global processing and hierarchically organized affordances – the lack of interaction between vision-for-perception and vision-for-action
Autorzy:
Piotr, Styrkowiec
Edward, Nęcka
Powiązania:
https://bibliotekanauki.pl/articles/430678.pdf
Data publikacji:
2012
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
perceptual global processing
affordances
visuo-motor information processing
Opis:
Abstract: In visual information processing, two kinds of vision are distinguished: vision-for-perception related to the conscious identifi cation of objects, and vision-for-action that deals with visual control of movements. Neuroscience suggests that these two functions are performed by two separate brain neural systems – the ventral and dorsal pathways (Milner and Goodale, 1995). Two experiments using behavioural measures were conducted with the objective of exploring any potential interaction between these two functions of vision. The aim was to combine in one task methods allowing for the simultaneous capture of both perceptual global processing and affordance extraction and to check whether they infi uence each other. This aim was achieved by employing the paradigms of Navon (1977) and Tucker and Ellis (1998). A compound fi gure was created made up of objects with handles that might or might not have orientation congruent between levels. The results revealed that while the affordance effect occurred every time, the Navon effect appeared only when subjects focused their attention on object elements responsible for inconsistence within compound fi gure. Most importantly, even when these two effects occurred at once, they had no effect on each other. Results from the study failed to confi rm the hypothesis about interaction and gives support to the view that vision-for-perception and vision-for-action tend to act as separate systems.
Źródło:
Polish Psychological Bulletin; 2012, 43, 3; 151-166
0079-2993
Pojawia się w:
Polish Psychological Bulletin
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Automatic inspection of surface defects in die castings after machining
Autorzy:
Świłło, S. J.
Perzyk, M.
Powiązania:
https://bibliotekanauki.pl/articles/380799.pdf
Data publikacji:
2011
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
nondestructive testing
casting defect
machined aluminum
die casting
image processing algorithm
vision system inspection
badania nieniszczące
wada odlewu
odlewanie ciśnieniowe
algorytm przetwarzania obrazu
inspekcja wizyjna
Opis:
A new camera based machine vision system for the automatic inspection of surface defects in aluminum die casting was developed by the authors. The problem of surface defects in aluminum die casting is widespread throughout the foundry industry and their detection is o f paramount importance in maintaining product quality. The casting surfaces are the most highly loaded regions of materials and components. Mechanical and thermal loads as well as corrosion or irradiation attacks are directed primarily at the surface of the castings. Depending on part design and processing techniques, castings may develop surface discontinuities such as cracks or tears, inclusions due to chemical reactions or foreign material in the molten metal, and pores that greatly influence the material ability to withs tand these loads. Surface defects may act as a stress concentrator initiating a fracture point. If a pressure is applied in this area, the casting can fracture. The human visual system is well adapted to perform in areas of variety and change; the visual inspection processes, on the other hand, require observing the same type of image repeatedly to detect anomalies. Slow, expensive, erratic inspection usually is the result. Computer based visual inspection provides a viable alternative to human inspectors. Developed by authors machine vision system uses an image processing algorithm based on modified Laplacian of Gaussian edge detection method to detect defects with different sizes and shapes. The defect inspection algorithm consists of three parameters. One is a parameter of defects sensitivity, the second parameter is a thres hold level and the third parameter is to identify the detected defects size and shape. The machine vision system has been successfully tested for the different types of defects on the surface of castings.
Źródło:
Archives of Foundry Engineering; 2011, 11, 3 spec.; 231-236
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Web-Based API as a Tool in Teaching Computer Vision Concepts
Autorzy:
ZACNIEWSKI, ARTUR
Powiązania:
https://bibliotekanauki.pl/articles/455716.pdf
Data publikacji:
2017
Wydawca:
Uniwersytet Rzeszowski
Tematy:
Web-based API
Computer Vision
image processing
Opis:
The article presents the stages of building Web-based API as a tool for teaching selected concepts of image processing server and shows a structure allowing for its implementation. During the implementation open source tools were used – graphical library OpenCV and Python programming language, which allows the implementation of both web part (by Django framework), as well as the cooperation with the above library. Idea of the creation of new Web-based API endpoints and the ability to change the parameters library OpenCV algorithms by modifying the URL in your browser were shown. Stages of creating each endpoint has been depicted with practical example on the image processing. Advantages and limitations of the proposed solution were presented.
Źródło:
Edukacja-Technika-Informatyka; 2017, 8, 1; 297-204
2080-9069
Pojawia się w:
Edukacja-Technika-Informatyka
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Assessment of Cutting Edge Defects Using a Vision Method
Autorzy:
Sioma, A.
Powiązania:
https://bibliotekanauki.pl/articles/387280.pdf
Data publikacji:
2012
Wydawca:
Politechnika Białostocka. Oficyna Wydawnicza Politechniki Białostockiej
Tematy:
przetwarzanie obrazów
sterowanie
kontrola jakości
3D vision system
image processing
surface defects
process control
quality control
Opis:
The paper discusses a vision method of assessment of laser cutting edges and surfaces of metals. It presents an analysis of the defects that occur at the edges and surfaces of components cut out in laser technology. It discusses in detail examples of defects, their causes, and methods of preventing their occurrence in the cutting process. The paper presents a vision method for the identification and assessment of defects based on selected examples. It also discusses a method of constructing a three-dimensional image of a product, issues related to the resolution of the vision system and the resolution of laser beam analysis, and methods of image analysis.
Źródło:
Acta Mechanica et Automatica; 2012, 6, 1; 57-62
1898-4088
2300-5319
Pojawia się w:
Acta Mechanica et Automatica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Cell detection and tracking in lab-on-a-chip devices by image processing
Autorzy:
Lizanets, D.
Walczak, R.
Powiązania:
https://bibliotekanauki.pl/articles/174093.pdf
Data publikacji:
2018
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
image processing
lab-on-a-chip
computer vision
bioanalysis
Opis:
This paper is devoted to the usage of image processing techniques in lab-on-a-chip devices for a cell detection and tracking. Advantages and disadvantages of image processing in data acquisition from lab-on-a-chip are described. A modified multiparametric object tracking method is presented. The method was tested on the lab-on-a-chip setup with living euglena and has shown plausible results for video with a low frame rate.
Źródło:
Optica Applicata; 2018, 48, 1; 15-24
0078-5466
1899-7015
Pojawia się w:
Optica Applicata
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The histogram-enhanced Hough transform applied to automated readout of analogue gauge meters using digital image processing
Autorzy:
Pociecha, D.
Żyłka, P.
Powiązania:
https://bibliotekanauki.pl/articles/114270.pdf
Data publikacji:
2015
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
metrology
computer vision
digital image processing
Opis:
The paper presents a computer vision technique developed for automated reading of analogue gauge meters. The system utilizes a mobile phone digital camera for image stream capturing and the Hough transform supplemented by multiply histogram analysis for locating a pointer position and parallax effect correction. The system is capable of working with minimal user supervision and its indicator position detection uncertainty is superior to that provided by a human eye. An attempt to use the algorithm implementation for semi-automatic calibration of an analogue voltmeter is also presented.
Źródło:
Measurement Automation Monitoring; 2015, 61, 11; 507-511
2450-2855
Pojawia się w:
Measurement Automation Monitoring
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Preprocessing algorithms of vision research damage to concrete railway sleepers
Autorzy:
Lesiak, P.
Sokołowski, A.
Powiązania:
https://bibliotekanauki.pl/articles/215079.pdf
Data publikacji:
2018
Wydawca:
Instytut Kolejnictwa
Tematy:
railway track
concrete sleeper
image processing algorithms
Opis:
The paper presents algorithms for the preprocessing of the visual method of detecting damages of concrete railway sleepers. It starts with acquiring images of the surface of the sleepers, by selecting the recorded frames of the images. Then, the color image is transformed into monochrome, so as to obtain the highest contrast possible. The Kanan and Cottrell algorithms were used for this purpose. A simple way is to segment the damage images of the sleepers, by thresholding, in order to binarize them. However, more elaborate algorithms are recommended. For this purpose, images are denoted using a median filter and further morphological operations to extract the edge of damage. For this purpose, noise is removed from images using a median filter, and morphological operations are carried out, to extract the edge of damage. In addition, texture images of the surface of the sleepers are used, removing them from the visual content. As the criterion for selecting the preprocessing algorithm, the shape of the image histogram and its standard deviation were assumed. Such prepared images form the basis for further assessment of the size of damages (cracks and voids) and classification of concrete sleepers.
Źródło:
Problemy Kolejnictwa; 2018, 180; 93-99
0552-2145
2544-9451
Pojawia się w:
Problemy Kolejnictwa
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 33

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