Research on Fabric Image Acquisition Based on Compressed Sensing

2014 ◽  
Vol 989-994 ◽  
pp. 3698-3701
Author(s):  
Ji Cheng Dong ◽  
Sheng Qi Guan ◽  
Long Long Chen
Keyword(s):  
Theoretical Analysis ◽  
Compressed Sensing ◽  
Textile Industry ◽  
Image Acquisition ◽  
Sampling Rate ◽  
Image Data ◽  
Sampling Theorem ◽  
High Quality ◽  
Shannon’S Sampling Theorem

Amount of data in collecting data of fabric image in the textile industry put forward a new challenge to sensor end. Compressed Sensing (CS) breaks limit of conventional Shannon’s sampling theorem, so we can reconstruct a signal in Sub-sampling rate. In addition, theoretical analysis tells us that collecting the fabric image data by CS method have a better advantage than collecting the general image data. Having reconstructed three fabric images and one general image by CS method, we can easily find that the former have a high quality of reconstruction.

Random Sampling and Signal Bregman Reconstruction Based on Compressed Sensing

2016 ◽  
Vol 4 (2) ◽  
pp. 365
Author(s):  
Guojun Qin ◽  
Jingfang Wang
Keyword(s):  
Compressed Sensing ◽  
Random Sampling ◽  
Sampling Method ◽  
Sampling Rate ◽  
Sparse Sampling ◽  
Sampling Theorem ◽  
Sampling Frequency ◽  
Frequency Resolution ◽  
Observation Matrix ◽  
The Fourier Transform

Compressed sensing (CS) sampling is a sampling method which is based on the signal sparse. Much information can be extracted from as little as possible of the data by applying CS and this method is the idea of great theoretical and applied prospects. In the framework of compressed sensing theory, the sampling rate is no longer decided in the bandwidth of the signal, but it depends on the structure and content of the information in the signal. In this paper, the signal is the sparse in the Fourier transform and random sparse sampling is advanced by programing random observation matrix for peak random base. The signal is successfully restored by the use of Bregman algorithm. The signal is described in the transform space, and a theoretical framework is established with a new signal descriptions and processing. By making the case to ensure that the information loss, signal is sampled at much lower than the Nyquist sampling theorem requiring rate,but also the signal is completely restored in high probability. The random sampling has following advantages: alias-free sampling frequency need not obey the Nyquist limit and higher frequency resolution.

Imaging of Transmission Equipment Based on Block Compressed Sensing

2012 ◽  
Vol 190-191 ◽  
pp. 998-1001 ◽  
Author(s):  
Jing Jing Zhao ◽  
Ji Xiang Sun ◽  
Shi Lin Zhou ◽  
Lei Hu
Keyword(s):  
Compressed Sensing ◽  
Image Data ◽  
Inspection System ◽  
Imaging Method ◽  
Fault Diagnose ◽  
High Quality ◽  
Transmission Equipment ◽  
Block Compressed Sensing ◽  
Simulation Results ◽  
Memory Resources

Imaging the overhead transmission equipment with high-resolution is very important to intelligent inspection, which is the prerequisites for fault diagnose. The intelligent inspection system often takes traditional imaging process of data acquisition followed by compression, which leads to the waste of image data and memory resources. We adopt an imaging method based on block compressed sensing to image the transmission equipment, the simulation results show that even if we only compressively sampled with 12.5% of the fully acquired image data, the image still can be recovered with high quality.

scholarly journals Interaction of Reactive-Dye Chromophores and DEG on Ink-Jet Printing Performance

Molecules ◽  
2020 ◽  
Vol 25 (11) ◽  
pp. 2507 ◽  
Author(s):  
Liyuan Zhang ◽  
Kuanjun Fang ◽  
Hua Zhou
Keyword(s):  
Textile Industry ◽  
Interaction Mechanism ◽  
Reactive Dye ◽  
High Quality ◽  
Ink Jet Printing ◽  
Ink Jet ◽  
Jet Printing ◽  
Reactive Orange ◽  
Dye Solutions

Digital inkjet printing has been widely used in textile industry. The quality of dye solutions and ink-jet droplets limits the ink-jet printing performance, which is very important for obtaining high-quality ink-jet printing images on fabrics. In this paper, we introduced diethylene glycol (DEG) into the dye solutions of Reactive Blue 49 and Reactive Orange 13, respectively, and investigated the interaction between dye chromophores and DEG molecules. Results indicated that the dye chromophores were featured in the aggregation. Adding DEG into the dye solution could effectively disaggregate clusters of reactive dyes, and eliminate satellite ink droplets, thus improving the resolution of the ink-jet printing image on fabrics. Under the same DEG concentration, the disaggregation effect was more obvious in Orange 13 than in Reactive Blue 49. Higher DEG concentration was required in Reactive Orange 13 solution for creating complete and stable ink drops. The surface tension and viscosity of the dye solutions were measured, and printing performance on cotton fabrics was evaluated. The interaction mechanism between dye chromophores and DEG molecules was also investigated. Results from this work are useful for high-quality ink-jet printing images on fabrics.

scholarly journals Wool productivity and quality of young sheep of a new type of Caucasian breed

2019 ◽  
pp. 61-63
Author(s):  
Vladimir Petrovich Lushnikov ◽  
Alexey Vyacheslavovich Molchanov ◽  
Dmitry Viktorovich Erofeev
Keyword(s):  
Textile Industry ◽  
Technological Properties ◽  
High Quality ◽  
New Type

The article presents the results of studies of wool productivity and the main technological indicators (length, wool finess, output of washed fiber, the area of contamination)of sheep of a new intrabreed type of Caucasian breed. It is shown that the technological properties of the wool of a new type of sheep are of fairly high quality and meet the requirements of the domestic textile industry.  

scholarly journals Image Encryption Scheme Based on Multiscale Block Compressed Sensing and Markov Model

Entropy ◽  
2021 ◽  
Vol 23 (10) ◽  
pp. 1297
Author(s):  
Yuandi Shi ◽  
Yinan Hu ◽  
Bin Wang
Keyword(s):  
Compressed Sensing ◽  
Markov Model ◽  
Image Encryption ◽  
Sampling Rate ◽  
Coefficient Matrix ◽  
Poor Quality ◽  
Encryption Scheme ◽  
Block Compressed Sensing ◽  
The Difference

Many image encryption schemes based on compressed sensing have the problem of poor quality of decrypted images. To deal with this problem, this paper develops an image encryption scheme by multiscale block compressed sensing. The image is decomposed by a three-level wavelet transform, and the sampling rates of coefficient matrices at all levels are calculated according to multiscale block compressed sensing theory and the given compression ratio. The first round of permutation is performed on the internal elements of the coefficient matrices at all levels. Then the coefficient matrix is compressed and combined. The second round of permutation is performed on the combined matrix based on the state transition matrix. Independent diffusion and forward-backward diffusion between pixels are used to obtain the final cipher image. Different sampling rates are set by considering the difference of information between an image’s low- and high-frequency parts. Therefore, the reconstruction quality of the decrypted image is better than that of other schemes, which set one sampling rate on an entire image. The proposed scheme takes full advantage of the randomness of the Markov model and shows an excellent encryption effect to resist various attacks.

Relationship between Akund Fibers’ Carding and Sliver Quality

2012 ◽  
Vol 476-478 ◽  
pp. 2014-2019
Author(s):  
Xiao Jiang ◽  
Long Di Cheng ◽  
Jian Yong Yu ◽  
Qin Wang ◽  
Elena Stojanovska ◽  
...  
Keyword(s):  
Textile Industry ◽  
Raw Materials ◽  
Fiber Content ◽  
High Quality ◽  
Calotropis Gigantea ◽  
Low Speed ◽  
Blended Yarn ◽  
The Relationship ◽  
Textile Fabric

The akund fiber has great potential to be used in the textile industry benefiting from its excellent properties. The adoption of akund fiber from calotropis gigantea could substitute or supplement cotton as raw materials for textile fabric and might reduce the possible damage to the environment. Therefore, The study in this paper on the relationship between carding procedure and the quality of akund fiber sliver aimed at optimizing the process of this new kind fiber on a flat top card has significant meaning. The results in this paper show that high quality slivers can be produced by using new wires, low speed of card elements or proper akund fiber content in blended yarn. However, decreasing the number of moving flats in the main carding zone too much would deteriorate the sliver quality.

scholarly journals Compressed Sensing Speech Signal Enhancement Research

2017 ◽  
Vol 6 (1) ◽  
pp. 26
Author(s):  
Kuangfeng Ning ◽  
Guojun Qin
Keyword(s):  
Compressed Sensing ◽  
Compressive Sensing ◽  
Input Signal ◽  
Speech Signal ◽  
Signal To Noise Ratio ◽  
Sampling Theorem ◽  
Compressed Domain ◽  
Signal To Noise ◽  
Perceptual Evaluation

<span lang="EN-US">The proposed Compressive sensing method is a new alternative method</span><span lang="EN-US">, it is</span><span lang="EN-US"> used to eliminate noise from the input signal</span><span lang="EN-US">,</span><span lang="EN-US"> and the quality of the speech signal </span><span lang="EN-US">is </span><span lang="EN-US">enhance</span><span lang="EN-US">d</span><span lang="EN-US"> with fewer samples</span><span lang="EN-US">, thus it is</span><span lang="EN-US"> required for the reconstruction than needed in some of the methods like Nyquist sampling theorem. The basic idea is</span><span lang="EN-US"> that </span><span lang="EN-US">the speech signals are sparse in nature</span><span lang="EN-US">,</span><span lang="EN-US"> and most of the noise signals are non-sparse in nature, and Compressive </span><span lang="EN-US">S</span><span lang="EN-US">ensing</span><span lang="EN-US">(</span><span lang="EN-US">CS) eliminates the non-sparse components and </span><span lang="EN-US">it </span><span lang="EN-US">reconstructs only the sparse components of the input signal. Experimental results prove that the average segmental SNR (signal to noise ratio) and PESQ (perceptual evaluation of speech quality) scores are better in the compressed domain</span><span lang="EN-US">．</span>

Influence of technology parameters of free-cutting steel continuous casting on the billet internal structure

2020 ◽  
Vol 76 (2) ◽  
pp. 139-142
Author(s):  
A. T. Kunakbaeva ◽  
A. M. Stolyarov ◽  
M. V. Potapova
Keyword(s):  
Regression Analysis ◽  
Continuous Casting ◽  
Internal Structure ◽  
Sulfur Content ◽  
Manganese Content ◽  
High Quality ◽  
Correlation And Regression Analysis ◽  
Cutting Steel ◽  
Continuously Cast

Free-cutting steel gains specific working properties thanks to the high content of sulfur and phosphorus. These elements, especially sulfur, have a rather high tendency to segregation. Therefore, segregation defects in free-cutting steel continuously cast billets can be significantly developed. The aim of the work was to study the influence of the chemical composition of freecutting steel and casting technological parameters on the quality of the macrostructure of continuously cast billets. A metallographic assessment of the internal structure of cast metal made of free-cutting steel and data processing by application of correlation and regression analysis were the research methods. The array of production data of 43 heats of free-cutting steel of grade A12 was studied. Steel casting on a five-strand radial type continuous casting machine was carried out by various methods of metal pouring from tundish into the molds. Metal of 19 heats was poured with an open stream, and 24 heats – by a closed stream through submerged nozzles with a vertical hole. High-quality billets had a cross-sectional size of 150×150 mm. The macrostructure of high-quality square billets made of free-cutting steel of A12 grade is characterized by the presence of central porosity, axial segregation and peripheral point contamination, the degree of development of which was in the range from 1.5 to 2.0 points, segregation cracks and strips – about 1.0 points. In the course of casting with an open stream, almost all of these defects are more developed comparing with the casting by a closed stream. As a result of correlation and regression analysis, linear dependences of the development degree of segregation cracks and strips both axial and angular on the sulfur content in steel and on the ratio of manganese content to sulfur content were established. The degree of these defects development increases with growing of sulfur content in steel of A12 grade. These defects had especially strong development when sulfur content in steel was of more than 0.10%. To improve the quality of cast metal, it is necessary to have the ratio of the manganese content to the sulfur content in the metal more than eight.

Experience of clinical testing of personal telemedicine system ‘Obereg’ for remote monitoring of patients in intensive care units

2020 ◽  
pp. 52-58 ◽  
Author(s):  
A. A. Eryomenko ◽  
N. V. Rostunova ◽  
S. A. Budagyan ◽  
V. V. Stets
Keyword(s):  
Intensive Care ◽  
Intensive Care Units ◽  
Remote Monitoring ◽  
Clinical Testing ◽  
Transportation Of Patients ◽  
High Quality ◽  
Telemedicine System ◽  
Accuracy Of Measurements ◽  
Hospital Equipment

The experience of clinical testing of the personal telemedicine system ‘Obereg’ for remote monitoring of patients at the intensive care units of leading Russian clinics is described. The high quality of communication with the remote receiving devices of doctors, the accuracy of measurements, resistance to interference from various hospital equipment and the absence of its own impact on such equipment were confirmed. There are significant advantages compared to stationary patient monitors, in particular, for intra and out-of-hospital transportation of patients.

METHODOLOGICAL ASPECTS OF VISUALIZATION OF CORONARY ARTERIES WITH TRANSTHORACIC ECHOCARDIOGRAPHY

2018 ◽  
pp. 26-35
Author(s):  
Z. A. Agaeva ◽  
K. B. Baghdasaryan
Keyword(s):  
Blood Flow ◽  
Coronary Blood Flow ◽  
Coronary Arteries ◽  
Transthoracic Echocardiography ◽  
Second Harmonic ◽  
Anatomic Reconstruction ◽  
High Quality ◽  
Acoustic Window ◽  
Methodological Aspects

The transthoracic echocardiography made by multifrequency probes with support of the mode of the second harmonic imaging, is a competitive method for visualization of the main coronary arteries and allows to estimate coronary blood flow with high quality. Of course, the method has considerable restrictions, most important of which is the low spatial resolution of a method, due to small acoustic window. Because of this the transthoracic visualization of coronary arteries perhaps will not become the leading method of anatomic reconstruction of separately taken coronary artery and especially all coronary arteries system. However uniqueness and indisputable advantage of this method is an opportunity to noninvasively estimate a coronary blood flow both once, and in dynamics.

Sign in / Sign up

Export Citation Format

Share Document