scholarly journals Curing Assessment of Concrete with Hyperspectral Imaging

Materials ◽  
2021 ◽  
Vol 14 (14) ◽  
pp. 3848
Author(s):  
Lisa Ptacek ◽  
Alfred Strauss ◽  
Barbara Hinterstoisser ◽  
Andreas Zitek
Keyword(s):  
Hyperspectral Imaging ◽  
Near Infrared ◽  
Strength Development ◽  
Contactless Method ◽  
Infrared Spectral ◽  
Young Concrete ◽  
Negative Effect ◽  
High Level ◽  
Destructive Measurement

The curing of concrete significantly influences the hydration process and its strength development. Inadequate curing leads to a loss of quality and has a negative effect on the durability of the concrete. Usually, the effects are not noticed until years later, when the first damage to the structure occurs because of the poor concrete quality. This paper presents a non-destructive measurement method for the determination of the curing quality of young concrete. Hyperspectral imaging in the near infrared is a contactless method that provides information about material properties in an electromagnetic wavelength range that cannot be seen with the human eye. Laboratory tests were carried out with samples with three different curing types at the age of 1, 7, and 27 days. The results showed that differences in the near infrared spectral signatures can be determined depending on the age of the concrete and the type of curing. The data was classified and analyzed by evaluating the results using k-means clustering. This method showed a high level of reliability for the differentiation between the different curing types and concrete ages. A recommendation for hyperspectral measurement and the evaluation of the curing quality of concrete could be made.

A method using near infrared hyperspectral imaging to highlight the internal quality of apple fruit slices

2021 ◽  
Vol 175 ◽  
pp. 111497
Author(s):  
Weijie Lan ◽  
Benoit Jaillais ◽  
Catherine M.G.C. Renard ◽  
Alexandre Leca ◽  
Songchao Chen ◽  
...  
Keyword(s):  
Hyperspectral Imaging ◽  
Near Infrared ◽  
Apple Fruit ◽  
Internal Quality

scholarly journals Bedside hyperspectral imaging for the evaluation of microcirculatory alterations in perioperative intensive care medicine: a study protocol for an observational clinical pilot study (HySpI-ICU)

BMJ Open ◽  
2020 ◽  
Vol 10 (9) ◽  
pp. e035742 ◽  
Author(s):  
Maximilian Dietrich ◽  
Sebastian Marx ◽  
Thomas Bruckner ◽  
Felix Nickel ◽  
Beat Peter Müller-Stich ◽  
...  
Keyword(s):  
Hyperspectral Imaging ◽  
Organ Dysfunction ◽  
Pancreatic Surgery ◽  
Near Infrared ◽  
Haemodynamic Monitoring ◽  
Healthy Controls ◽  
Study Results ◽  
Infrared Spectral ◽  
Registration Number ◽  
Tissue System

IntroductionNormalisation of macrocirculatory parameters during resuscitation therapy does not guarantee the restoration of microcirculatory perfusion in critical illness due to haemodynamic incoherence. Persistent microcirculatory abnormalities are associated with severity of organ dysfunction and mandate the development of bedside microcirculatory monitoring. A novel hyperspectral imaging (HSI) system can visualise changes in skin perfusion, oxygenation and water content at the bedside. We aim to evaluate the effectiveness of HSI for bedside monitoring of skin microcirculation and the association of HSI parameters with organ dysfunction in patients with sepsis and major abdominal surgery.Methods and analysisThree independent groups will be assessed and separately analysed within a clinical prospective observational study: (1) 25 patients with sepsis or septic shock (according to sepsis-3 criteria), (2) 25 patients undergoing pancreatic surgery and (3) 25 healthy controls. Patients with sepsis and patients undergoing pancreatic surgery will receive standard therapy according to local protocols derived from international guidelines. In addition, cardiac output of perioperative patients and patients with sepsis will be measured. Healthy controls undergo one standardised evaluation. The TIVITA Tissue System is a novel HSI system that uses the visible and near-infrared spectral light region to determine tissue microcirculatory parameters. HSI analysis (hand/knee) will be done in parallel to haemodynamic monitoring within defined intervals during a 72-hour observation period. HSI data will be correlated with the Sequential Organ Failure Assessment score, global haemodynamics, inflammation and glycocalyx markers, surgical complications and 30-day outcome.Ethics and disseminationThe protocol has been approved by the local ethics committee of the University of Heidelberg (S-148/2019). Study results will be submitted to peer-reviewed journals and medical conferences.Trial registration numberDRKS00017313; Pre-results.

Application of Visible-Near Infrared Spectra Technique Based on to the Non-Destructive Measurement of the Salmon Quality

2014 ◽  
Vol 926-930 ◽  
pp. 961-964
Author(s):  
Jiao Jiao Yin
Keyword(s):  
Infrared Spectra ◽  
Near Infrared ◽  
Principal Component ◽  
Support Vector ◽  
Analysis Method ◽  
Linear Discriminant ◽  
Near Infrared Spectra ◽  
Destructive Measurement ◽  
Non Destructive

Because the reflectivity of astaxanthin vary in different bands (mainly 400nm-600nm), so we use the visible-near infrared spectra technique to irradiate the salmon. Because in daily life, people grade the salmon flesh with a color card. In this paper, we first use principal component analysis to reduce the dimensionality of the spectral data of salmon, then use linear discriminant analysis method, least squares support vector machine classification method to distinguish the flesh quality. The correct classification rates are 60%and73.3%. The results show that we can use visible – near infrared spectra to distinguish the quality of the salmon which doesn’t be dissected.

scholarly journals Use of infrared hyperspectral imaging as an aid for paint identification

2016 ◽  
Author(s):  
A. Polak ◽  
T. Kelman ◽  
P. Murray ◽  
S. Marshall ◽  
D. Stothard ◽  
...  
Keyword(s):  
Hyperspectral Imaging ◽  
Near Infrared ◽  
Imaging System ◽  
Classification Problem ◽  
Extensive Study ◽  
Electromagnetic Spectrum ◽  
New Techniques ◽  
Art Authentication ◽  
Infrared Spectral ◽  
Non Destructive

Art authentication is a complicated process that often requires the extensive study of high value objects. Although a series of non-destructive techniques is already available for art scientists, new techniques, extending current possibilities, are still required. In this paper, the use of a novel mid-infrared tunable imager is proposed as an active hyperspectral imaging system for art work analysis. The system provides access to a range of wavelengths in the electromagnetic spectrum (2500–3750 nm) which are otherwise difficult to access using conventional hyperspectral imaging (HSI) equipment. The use of such a tool could be beneficial if applied to the paint classification problem and could help analysts map the diversity of pigments within a given painting. The performance of this tool is demonstrated and compared with a conventional, off-the-shelf HSI system operating in the near infrared spectral region (900–1700 nm). Various challenges associated with laser-based imaging are demonstrated and solutions to these challenges as well as the results of applying classification algorithms to datasets captured using both HSI systems are presented. While the conventional HSI system provides data in which more pigments can be accurately classified, the result of applying the proposed laser-based imaging system demonstrates the validity of this technique for application in art authentication tasks.

Fast inline tobacco classification by near-infrared hyperspectral imaging and support vector machine-discriminant analysis

2019 ◽  
Vol 11 (14) ◽  
pp. 1966-1975 ◽  
Author(s):  
Marcelo C. A. Marcelo ◽  
Frederico L. F. Soares ◽  
Jorge A. Ardila ◽  
Jailson C. Dias ◽  
Ricardo Pedó ◽  
...  
Keyword(s):  
Support Vector Machine ◽  
Discriminant Analysis ◽  
Hyperspectral Imaging ◽  
Near Infrared ◽  
Classification Systems ◽  
Green Leaf ◽  
Support Vector ◽  
Chemical Characteristics ◽  
Tobacco Leaves

Classification systems are frequently used in tobacco Green Leaf Threshing (GLT) facilities to assess the chemical characteristics and quality of tobacco leaves.

Applications of Visible and near-Infrared Hyperspectral Imaging for Non-Destructive Detection of the Agricultural Products

2011 ◽  
Vol 317-319 ◽  
pp. 909-914
Author(s):  
Ying Lan Jiang ◽  
Ruo Yu Zhang ◽  
Jie Yu ◽  
Wan Chao Hu ◽  
Zhang Tao Yin
Keyword(s):  
Hyperspectral Imaging ◽  
Near Infrared ◽  
Imaging System ◽  
Imaging Technique ◽  
Agricultural Products ◽  
Quality Inspection ◽  
Hyperspectral Reflectance ◽  
Imaging And Spectroscopy ◽  
Non Destructive

Agricultural products quality which included intrinsic attribute and extrinsic characteristic, closely related to the health of consumer and the exported cost. Now, imaging (machine vision) and spectrum are two main nondestructive inspection technologies to be applied. Hyperspectral imaging, a new emerging technology developed for detecting quality of the food and agricultural products in recent years, combined techniques of conventional imaging and spectroscopy to obtain both spatial and spectral information from an objective simultaneously. This paper compared the advantage and disadvantage of imaging, spectrum and hyperspectral imaging technique, and provided a description to basic principle, feature of hyperspectral imaging system and calibration of hyperspectral reflectance images. In addition, the recent advances for the application of hyperspectral imaging to agricultural products quality inspection were reviewed in other countries and China.

scholarly journals Post-stroke depression

2014 ◽  
Vol 155 (34) ◽  
pp. 1335-1343 ◽  
Author(s):  
Mónika Schulte-Altedorneburg ◽  
Dániel Bereczki
Keyword(s):  
Cerebrovascular Diseases ◽  
Depressive Illness ◽  
First Year ◽  
Post Stroke ◽  
Treatment And Prevention ◽  
High Incidence ◽  
Negative Effect ◽  
Post Stroke Depression ◽  
High Level

Cerebrovascular diseases are associated with a high incidence of psychiatric disorders. Depressive illness after stroke has been extensively investigated during the last three decades. Post-stroke depression is estimated to occur in 30–35% of the patients during the first year after stroke. Numerous studies have given information on its prevalence, pathogenesis, clinical course, treatment and prevention. Despite the high level of comorbidity, depressive symptoms appear to remain frequently unrecognized and untreated. This has a negative effect on the rehabilitation, quality of live, cognitive function and mortality of stroke patients. Orv. Hetil., 2014, 155(34), 1335–1343.

scholarly journals Assessment of pesticide coating on cereal seeds by near infrared hyperspectral imaging

2017 ◽  
Author(s):  
Ph. Vermeulen ◽  
P. Flémal ◽  
O. Pigeon ◽  
P. Dardenne ◽  
J. Fernández Pierna ◽  
...  
Keyword(s):  
Least Squares ◽  
Partial Least Squares ◽  
Hyperspectral Imaging ◽  
Near Infrared ◽  
Seed Quality ◽  
Reference Method ◽  
Nir Spectroscopy ◽  
Ultra Performance Liquid Chromatography

Classical chromatographic methods, such as ultra performance liquid chromatography (UPLC), are used as reference methods to assess seed quality and homogeneous pesticide coating of seeds. These methods have some important drawbacks since they are time consuming, expensive, destructive and require a substantial amount of solvent, among others. Near infrared (NIR) spectroscopy seems to be an interesting alternative technique for the determination of the quality of seed treatment and avoids most of these drawbacks. The objective of this study was to assess the quality of pesticide coating treatment by near infrared hyperspectral imaging (NIR-HSI) by analysing, on a seed-by-seed basis, several seeds simultaneously in comparison to NIR spectroscopy and UPLC as the reference method. To achieve this goal, discrimination—partial least squares discriminant analysis (PLS-DA)—models and regression—partial least squares (PLS)—models were developed. The results obtained by NIR-HSI are compared to the results obtained with NIR spectroscopy and UPLC instruments. This study has shown the potential of NIR hyperspectral imaging to assess the quality/homogeneity of the pesticide coating on seeds.

scholarly journals Laparoscopic system for simultaneous high-resolution video and rapid hyperspectral imaging in the visible and near-infrared spectral range

2020 ◽  
Vol 25 (08) ◽  
Author(s):  
Hannes Köhler ◽  
Axel Kulcke ◽  
Marianne Maktabi ◽  
Yusef Moulla ◽  
Boris Jansen-Winkeln ◽  
...  
Keyword(s):  
High Resolution ◽  
Hyperspectral Imaging ◽  
Spectral Range ◽  
Near Infrared ◽  
Infrared Spectral Range ◽  
Infrared Spectral

scholarly journals The Effectiveness of Maize DDGS in Rabbit Diets / Efektywność zastosowania suszonego wywaru kukurydzianego w dietach dla królików

2013 ◽  
Vol 13 (3) ◽  
pp. 571-585 ◽  
Author(s):  
Agnieszka Chełmińska ◽  
Dorota Kowalska
Keyword(s):  
Distillers Grains ◽  
Biofuel Production ◽  
The European Union ◽  
Feed Material ◽  
Distillers Grains With Solubles ◽  
Dried Distillers Grains ◽  
New Zealand White Rabbits ◽  
Negative Effect ◽  
High Level

Abstract The development of biofuel production in the European Union is expected to increase the production of distillers grains, which can be a good feed material after concentration, centrifugation and drying. Research shows that dried distillers grains that meet microbiological and toxicological standards can be a nutritious feed for different species of animals. The aim of the study was to determine the effect of adding different levels (5 or 10%) of maize dried distillers grains with solubles (DDGS) to complete feeds on rearing performance and meat quality of young rabbits. The study was carried out with New Zealand White rabbits from weaning at 35 days to 90 days of age. The results obtained showed that the introduction of 5% DDGS to rabbit diets had no negative effect on rearing performance of rabbits from 35 to 90 days of age and on the quality of their meat. Despite using a detoxifier, the 10% level was hazardous to rabbits due to the high level of mycotoxins in the purchased DDGS and markedly decreased the quality of their meat. Therefore it appears necessary to analyse the distillers grains fed to this group of animals for mycotoxins, in particular to determine their safe levels for rabbits.

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