scholarly journals Dynamic Measurement of Foam-Sized Yarn Properties from Yarn Sequence Images

2018 ◽  
Vol 18 (3) ◽  
pp. 314-322 ◽  
Author(s):  
Bo Zhu ◽  
Zhongjian Li ◽  
Xinwei Cao ◽  
Jianli Liu ◽  
Weidong Gao
Keyword(s):  
Image Analysis ◽  
Film Thickness ◽  
Cross Sections ◽  
Clustering Algorithm ◽  
Dynamic Method ◽  
Penetration Rate ◽  
Dynamic Measurement ◽  
Dynamic Threshold ◽  
Yarn Properties ◽  
Low Efficiency

Abstract Unlike the normal sizing method, the foam sizing had been proven to be a low-add-on technology. To investigate the effect of foam sizing, film thickness, sized-yarn evenness, and size penetration rate were necessary to evaluate the performances of foam-sized yarns. However, the conventional image analysis of sized-yarn cross sections primarily relied on artificial testing with a low efficiency. This paper proposed a novel dynamic method to measure the sized-yarn properties including film thickness, sized-yarn evenness, and size penetration rate based on yarn sequence images captured from a moving yarn. A method of dynamic threshold module was adopted to obtain threshold for segmenting yarns in the sequence images. K-means clustering algorithm was applied to segment pixels of the images into yarn and background. To further remove burrs and noise in the images, two judgment templates were carried out to extract the information of yarn core. The film thickness, sized-yarn evenness, and size penetration rate were measured based on the yarn core of each frame in sequence images. In order to compare with the experimental results of the dynamic method, the yarn properties of the same samples were tested by static and artificial testing. Results revealed that the proposed method could efficiently and accurately detect the film thickness, sized-yarn evenness, and size penetration rate.

Gender determination of caucasoid hair using image analysis

1993 ◽  
Vol 51 ◽  
pp. 216-217
Author(s):  
T.B. Ball ◽  
W.M. Hess
Keyword(s):  
Image Analysis ◽  
Cross Sections ◽  
Scalp Hair ◽  
The Body ◽  
Equivalent Diameter ◽  
Cross Sectional ◽  
Hair Samples ◽  
Length Width ◽  
Morphological Differences

It has been demonstrated that cross sections of bundles of hair can be effectively studied using image analysis. These studies can help to elucidate morphological differences of hair from one region of the body to another. The purpose of the present investigation was to use image analysis to determine whether morphological differences could be demonstrated between male and female human Caucasian terminal scalp hair.Hair samples were taken from the back of the head from 18 caucasoid males and 13 caucasoid females (Figs. 1-2). Bundles of 50 hairs were processed for cross-sectional examination and then analyzed using Prism Image Analysis software on a Macintosh llci computer. Twenty morphological parameters of size and shape were evaluated for each hair cross-section. The size parameters evaluated were area, convex area, perimeter, convex perimeter, length, breadth, fiber length, width, equivalent diameter, and inscribed radius. The shape parameters considered were formfactor, roundness, convexity, solidity, compactness, aspect ratio, elongation, curl, and fractal dimension.

Automated 3D measurement of fiber cross section morphology in handsheets

2012 ◽  
Vol 27 (2) ◽  
pp. 264-269 ◽  
Author(s):  
Christian Lorbach ◽  
Ulrich Hirn ◽  
Johannes Kritzinger ◽  
Wolfgang Bauer
Keyword(s):  
Image Analysis ◽  
Cross Section ◽  
Cross Sections ◽  
Image Plane ◽  
3D Measurement ◽  
Cross Sectional ◽  
Fiber Cross Section ◽  
Fiber Wall ◽  
Sectional Shape ◽  
Cross Section Geometry

Abstract We present a method for 3D measurement of fiber cross sectional morphology from handsheets. An automated procedure is used to acquire 3D datasets of fiber cross sectional images using an automated microtome and light microscopy. The fiber cross section geometry is extracted using digital image analysis. Simple sample preparation and highly automated image acquisition and image analysis are providing an efficient tool to analyze large samples. It is demonstrated that if fibers are tilted towards the image plane the images of fiber cross sections are always larger than the true fiber cross section geometry. In our analysis the tilting angles of the fibers to the image plane are measured. The resulting fiber cross sectional images are distorted to compensate the error due to fiber tilt, restoring the true fiber cross sectional shape. We use an approximated correction, the paper provides error estimates of the approximation. Measurement results for fiber wall thickness, fiber coarseness and fiber collapse are presented for one hardwood and one softwood pulp.

Fiber Blending Irregularities in Cross Sections and on Yarn Surfaces in Relation to Yarn Properties

1988 ◽  
Vol 58 (5) ◽  
pp. 291-298 ◽  
Author(s):  
Izabella Krucińnska
Keyword(s):  
Surface Analysis ◽  
Cross Sections ◽  
Original Method ◽  
New Method ◽  
Cross Sectional ◽  
Yarn Properties ◽  
Yarn Surface ◽  
Fiber Blending

An analysis of fiber blending irregularities is presented in relation to the disturbances of blend yarn properties resulting from these phenomena. Fiber blending irregularities were assessed using the original method of yarn surface analysis and a new method of yarn cross-sectional division. These methods correctly reflect the disturbances in the mechanical and aesthetic yarn properties resulting from non-uniform mixing of constituent fibers.

Image Analysis of a Moving Bubble Train in a Tube

2014 ◽  
Vol 487 ◽  
pp. 440-443
Author(s):  
Zhan Xu Wang
Keyword(s):  
Porous Media ◽  
Image Analysis ◽  
Cross Section ◽  
Cross Sections ◽  
Test Tube ◽  
Visual Images ◽  
Total Length ◽  
Foam In Porous Media

A tube with varying cross sections can capture some essential features of the motion of foam in porous media. In this paper, experiments were carried out concerning a moving bubbles train through cylindrical ducts with sinusoidal cross-section. The test tube has total length of 1.14 m and has constrictions at interval of 0.0095 m. The visual images of a single lamella motion were recorded and were interpreted. It is found the lamella decelerates in the diverging portion while accelerates in the converging part of the tube.

Optimized Automatic Seeded Region Growing Algorithm with Application to ROI Extraction

2017 ◽  
Vol 17 (04) ◽  
pp. 1750024 ◽  
Author(s):  
Qianwen Li ◽  
Zhihua Wei ◽  
Cairong Zhao
Keyword(s):  
Image Analysis ◽  
Computational Complexity ◽  
Clustering Algorithm ◽  
Region Of Interest ◽  
Region Growing ◽  
Regions Of Interest ◽  
Automatic Extraction ◽  
Seeded Region Growing ◽  
Roi Extraction ◽  
Ap Clustering

Region of interest (ROI) is the most important part of an image that expresses the effective content of the image. Extracting regions of interest from images accurately and efficiently can reduce computational complexity and is essential for image analysis and understanding. In order to achieve the automatic extraction of regions of interest and obtain more accurate regions of interest, this paper proposes Optimized Automatic Seeded Region Growing (OASRG) algorithm. The algorithm uses the affinity propagation (AP) clustering algorithm to extract the seeds automatically, and optimizes the traditional region growing algorithm by regrowing strategy to obtain the regions of interest where target objects are contained. Experimental results show that our algorithm can automatically locate seeds and produce results as good as traditional region growing with seeds selected manually. Furthermore, the precision is improved and the extraction effect is better after the optimization with regrowing strategy.

scholarly journals Multiscale porosity estimates along the pro-and retrograde deformation path: an example from Alpine slates

2018 ◽  
Author(s):  
Ismay Vénice Akker ◽  
Josef Kaufmann ◽  
Guillaume Desbois ◽  
Jop Klaver ◽  
Janos L. Urai ◽  
...  
Keyword(s):  
Image Analysis ◽  
Cross Sections ◽  
Co2 Sequestration ◽  
Mercury Intrusion Porosimetry ◽  
Mechanical Stability ◽  
Ion Beam ◽  
Deformation Path ◽  
Surface Samples ◽  
Pore Types ◽  
Prograde Path

Abstract. Estimating porosity of slates is of great interest for the recently rising industries dealing with the underground such as CO2 sequestration, nuclear waste disposal and shale gas but also for engineering purposes in terms of mechanical stability for underground or surface constructions. In this study, we aim understanding estimates of porosity of slates from the Infrahelvetic Flysch Units (IFU) in the Glarus Alps (eastern Switzerland) and their changes as function of varying metamorphic grade. Surface and sub-surface samples are collected along a temperature gradient from 200 to 320 °C and give therefore the opportunity to link pore types along the deformation path and to surface processes or indicate what artificially induced porosity is. A developed workflow consists of a combination of bulk rock measurements such as Helium pycnometry (He-pycnometry) and Mercury Intrusion Porosimetry (MIP) with image analysis. Image analysis is performed on high scale resolution with Scanning Electron Microscopy (SEM) on Broad Ion Beam (BIB) prepared cross sections (BIB-SEM). Different vein generations give evidence for porosity formation at depth. Towards peak metamorphic conditions (prograde path) porosity reduces to

Three-dimensional image analysis and display by space-scale matching of cross sections

1989 ◽  
Vol 6 (6) ◽  
pp. 890 ◽  
Author(s):  
V. R. Algazi ◽  
B. W. Reutter ◽  
W. L. G. van Warmerdam ◽  
C. C. Liu
Keyword(s):  
Image Analysis ◽  
Cross Sections ◽  
Three Dimensional ◽  
Dimensional Image ◽  
Space Scale

Image analysis for measuring lichen colonization on and within stonework

2009 ◽  
Vol 41 (3) ◽  
pp. 299-313 ◽  
Author(s):  
Claudia GAZZANO ◽  
Sergio E. FAVERO-LONGO ◽  
Enrica MATTEUCCI ◽  
Rosanna PIERVITTORI
Keyword(s):  
Image Analysis ◽  
High Resolution ◽  
Cultural Heritage ◽  
Cross Sections ◽  
Periodic Acid ◽  
Lichen Species ◽  
Pixel Classification ◽  
Percentage Cover ◽  
Periodic Acid Schiff ◽  
High Resolution Images

AbstractThe suitability of image analysis by colour-based pixel classification to quantify lichen colonization on the surface of and within marble, travertine and mortar stonework has been investigated. High resolution images of lichenized stonework surfaces were acquired at different field sites using a scanner, thus avoiding invasive surveys, and the percentage cover of lichen species was subsequently measured in the laboratory using dedicated software. Furthermore, microphotographs of polished cross-sections of lichenized marble, travertine and mortar, stained using the periodic acid-Schiff (PAS) method to visualize hyphae, were produced by the same software to quantify hyphal spread within the substratum, a parameter which can be used more successfully than the commonly used depth of hyphal penetration to quantify how much the lichen has affected the conservation of a stone substratum. Significant statistical differences in hue, saturation and intensity (HSI) of the lichen thalli and PAS-stained hyphae, with respect to the lithic substrata, allowed the software to discriminate and quantify the lichen species cover on, and hyphal spread within, the three investigated lithotypes. Since such a quantitative approach highlights the volume of influence of lichens on stonework, where bioweathering processes are likely to develop, it could be used to support decisions on the preservation of our stone cultural heritage.

Influence of Different Suspension Properties on Internal Structure and Deformation Behavior of Spray Dried Ceramic Granules

2010 ◽  
Vol 62 ◽  
pp. 157-162
Author(s):  
Susanna Eckhard ◽  
Manfred Fries
Keyword(s):  
Mechanical Properties ◽  
Image Analysis ◽  
Nitric Acid ◽  
Cross Sections ◽  
Deformation Behavior ◽  
Shell Thickness ◽  
Structure Parameters ◽  
Spray Dryer ◽  
Granule Strength ◽  
Spray Dried

Three different batches of ceramic alumina granules were produced using a spray dryer in laboratory scale. The suspensions containing identical solid contents and amounts of binders were modified by adding nitric acid to get different stabilized conditions. The granules were analyzed concerning micro and macro structural properties by image analysis on specially prepared granule cross-sections. The investigated structure parameters were correlated with the studied mechanical properties using a commercially granule strength tester. Different measured fracture forces were explained by varied macro structures (parameter H, amount of hollow and homogeneous granules and average shell thickness) as a result of modified suspension properties.

Sign in / Sign up

Export Citation Format

Share Document