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Keywords: image analysis
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Journal Articles
Journal:
Geotechnical Testing Journal
Publisher: ASTM International
Article Type: Technical Notes
Geotech. Test. J.. March 2023, 46(2): 422–429.
Paper No: GTJ20220032
Published Online: March 1, 2023
... an image of the specimen every 4° of rotation. Narrow vertical strips from each image are automatically stitched together to form a complete, unwrapped 360° view of the soil specimen. Image analysis based on a mathematical Haar wavelet transform generates the soil specimen’s PSD. Three sands were tested...
Journal Articles
Journal:
Geotechnical Testing Journal
Publisher: ASTM International
Article Type: Technical Papers
Geotech. Test. J.. May 2022, 45(3): 513–529.
Paper No: GTJ20210047
Published Online: May 1, 2022
... of tested specimens. To address these issues, this paper utilizes a simple digital image analysis technique, implemented using open source software tools, to improve strain measurements in geosynthetic tensile testing. The presented technique is simple to use, low-cost, and can be deployed easily using...
Journal Articles
Journal:
Geotechnical Testing Journal
Publisher: ASTM International
Article Type: Technical Papers
Geotech. Test. J.. July 2021, 44(4): 929–947.
Paper No: GTJ20200104
Published Online: July 1, 2021
.... 30 03 2020 12 11 2020 15 03 2021 particle size and shape characterization lens distortion image analysis cameras References Altuhafi , F. N. , Coop M. R. , and Georgiannou V. N. . 2016 . “ Effect of Particle Shape on the Mechanical Behavior of Natural...
Journal Articles
Journal:
Geotechnical Testing Journal
Publisher: ASTM International
Article Type: Research-Article
Geotech. Test. J.. March 2017, 40(2): 317–328.
Paper No: GTJ20160165
Published Online: February 28, 2017
... of particles are not attainable from single images. This paper described a simple, effective, and inexpensive stereophotography system to obtain precise 3D surfaces and thus, all three principal dimensions of many sand to gravel particles simultaneously. Advanced image analysis techniques, including improved...
Journal Articles
Journal:
Geotechnical Testing Journal
Publisher: ASTM International
Article Type: Research-Article
Geotech. Test. J.. September 2015, 38(5): 645–655.
Paper No: GTJ20140239
Published Online: September 9, 2015
...T. Piti-khunpongsuk; R. D. Hryciw; R. A. Green This paper described the use of photoelasticity and digital image analysis to determine horizontal stress (σ h ) and to estimate the lateral earth pressure coefficient at rest ( K o ) in 2-dimensional particulate assemblies. Square 25.4 by 25.4 mm (1.0...
Journal Articles
Journal:
Geotechnical Testing Journal
Publisher: ASTM International
Article Type: Research-Article
Geotech. Test. J.. September 2015, 38(5): 752–764.
Paper No: GTJ20140215
Published Online: September 9, 2015
... soil and digital image analysis was proposed to visualize heat flow in soil. Advocating the loss of optical clarity as a beneficial attribute of transparent soil, this paper explored the hypothesis that temperature change will alter its refractive index and therefore progressively reduce its...
Journal Articles
Journal:
Geotechnical Testing Journal
Publisher: ASTM International
Article Type: Research-Article
Geotech. Test. J.. September 2014, 37(5): 828–839.
Paper No: GTJ20130138
Published Online: September 22, 2014
...-segmentation techniques. 13 08 2013 10 06 2014 15 07 2014 sand–geosynthetic interface surface roughness shear band image analysis direct shear test References Assadi , A. , 1975 , “ Rupture Layers in Granular Materials ,” Ph.D. thesis, University of London , London...
Journal Articles
Journal:
Geotechnical Testing Journal
Publisher: ASTM International
Article Type: Research-Article
Geotech. Test. J.. September 1997, 20(3): 324–339.
Paper No: GTJ19970008
Published Online: July 16, 2014
...Liqun Liang; Adel Saada; J. Ludwig Figueroa; C. T. Cope A new technique involving sample preparation, video imaging, and image analysis has been developed to observe the kinematics of shear bands when geomaterials are subjected to a general state of combined stress. The technique provides...
Journal Articles
Journal:
Geotechnical Testing Journal
Publisher: ASTM International
Article Type: Technical Notes
Geotech. Test. J.. November 2012, 35(6): 1–9.
Published Online: October 3, 2012
... been dealt with using an image-analysis technique. Starting from the fundamentals of fracture mechanics, J integral is expressed as a summation of several line integrals. The major advantage of the new method is its suitability for wet or slurry soils for which load tests are impossible. 09 08...
Journal Articles
Journal:
Geotechnical Testing Journal
Publisher: ASTM International
Article Type: Research-Article
Geotech. Test. J.. November 2011, 34(6): 571–578.
Published Online: November 1, 2011
... 11 07 2011 soil deformation compaction transparent clay image analysis References Adrian , R. , 1986 , “ Multi-Point Optical Measurements of Simultaneous Vectors in Unsteady Flow—A Review ,” Int. J. Heat Fluid Flow , Vol. 7 , No. 2 , pp. 127 – 145 . https://doi.org...
Journal Articles
Journal:
Geotechnical Testing Journal
Publisher: ASTM International
Article Type: Research-Article
Geotech. Test. J.. November 2009, 32(6): 505–515.
Published Online: November 1, 2009
...M. R. Lakshmikantha; P. C. Prat; A. Ledesma The paper presents a methodology for quantifying surface crack patterns that appear in cohesive soils under drying conditions due to environmental changes, using image analysis techniques. This has practical applications in the study of many geotechnical...
Journal Articles
Journal:
Geotechnical Testing Journal
Publisher: ASTM International
Article Type: Research-Article
Geotech. Test. J.. November 2009, 32(6): 526–536.
Published Online: November 1, 2009
... laboratory tests that are often long and expensive. Our approach is a development of in-situ identification tests used to complement “blind” mechanical tests. A new method is proposed for obtaining in-situ soil classification based on the use of geo-endoscopy and image analysis. This technique is based...
Journal Articles
Journal:
Geotechnical Testing Journal
Publisher: ASTM International
Article Type: Research-Article
Geotech. Test. J.. March 2009, 32(2): 126–138.
Published Online: March 1, 2009
... to be monitored. This device uses particle image velocimetry (PIV) image analysis techniques to monitor the side of the peat specimen and provide an insight into the behavior of peat during shearing. A set of comparative tests on reconstituted clay have been conducted with another widely used DSS apparatus...
Journal Articles
Journal:
Geotechnical Testing Journal
Publisher: ASTM International
Article Type: Research-Article
Geotech. Test. J.. May 2007, 30(3): 173–181.
Published Online: May 1, 2007
... obtained by the bubble point test were not comparable to the manufacturers' reported AOS values, indicating the limitation of ASTM D 4751 in determining constriction sizes. A direct method, such as image analysis, may be a better approach for determining the pore sizes of woven geotextiles, whereas...
Journal Articles
Determination of Surface and Thickness Characteristics of Textured Geomembranes Using Image Analysis
Journal:
Geotechnical Testing Journal
Publisher: ASTM International
Article Type: Research-Article
Geotech. Test. J.. May 2005, 28(3): 275–287.
Published Online: May 1, 2005
...N Yesiller; A Cekic Image analysis was used to determine surface topography and thickness of textured geomembranes. Images of cross sections (specimen length × thickness) of geomembranes were obtained at 50× magnification using a digital optical microscope. Thickness was determined as the distance...
Journal Articles
Journal:
Geotechnical Testing Journal
Publisher: ASTM International
Article Type: Research-Article
Geotech. Test. J.. December 2003, 26(4): 390–401.
Published Online: December 1, 2003
... in this paper exhibit consolidation behavior similar to that of organic clays and peat. The permeability of the material falls within the range typically reported for clays and peats. 12 12 2001 18 12 2002 17 11 2003 Clay Peat Consolidation Permeability Image Analysis Optical...
Journal Articles
Journal:
Geotechnical Testing Journal
Publisher: ASTM International
Article Type: Research-Article
Geotech. Test. J.. March 2003, 26(1): 57–70.
Published Online: March 1, 2003
... and investigated the uniformity of specimens prepared with the method by quantitatively analyzing both X-ray and optical images. KEYWORDS: moist tamping, uniformity, image analysis, compaction force Introduction The majority of laboratory tests on granular soils, such as sands and gravels, are performed...
Journal Articles
Journal:
Geotechnical Testing Journal
Publisher: ASTM International
Article Type: Research-Article
Geotech. Test. J.. June 2002, 25(2): 128–141.
Published Online: June 1, 2002
... the high strain rates and a custom square triaxial cell to minimize optical distortion. Methods to collect and analyze the experimental results are also presented. High-speed film photography, coupled with digital image analysis techniques, are used to capture specimen deformations. Experimental issues...
Journal Articles
Journal:
Geotechnical Testing Journal
Publisher: ASTM International
Article Type: Research-Article
Geotech. Test. J.. December 2000, 23(4): 522–531.
Published Online: December 1, 2000
... penetration is to be more accurately predicted. 15 04 1999 02 06 2000 membrane penetration contact patterns image analysis specimen preparation References Baldi , G. and Nova , R. , 1984 , “ Membrane Penetration Effects in Triaxial Testing ,” Journal of Geotechnical...
Journal Articles
Journal:
Geotechnical Testing Journal
Publisher: ASTM International
Article Type: Research-Article
Geotech. Test. J.. December 2000, 23(4): 423–431.
Published Online: December 1, 2000
... ,” Mechanics of Materials , Vol. 9 , pp. 65 - 80 . Berryman , J. G. and Blair , S. C. , 1986 , “ Use of Digital Image Analysis to Estimate Fluid Permeability of Porous Materials: Application of Two-Point Correlation Functions ,” Journal of Applied Physics 0021-8979 https://doi.org...
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