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A study on the reproducibility of counting vesicles in volcanic rocks
Language
English
Obiettivo Specifico
2.3. TTC - Laboratori di chimica e fisica delle rocce
Status
Published
JCR Journal
JCR Journal
Peer review journal
Yes
Title of the book
Issue/vol(year)
1/7(2011)
Publisher
Geological Society of America
Pages (printed)
70-78
Issued date
February 2011
Alternative Location
Abstract
Vesicle size distributions in two and three dimensions of two samples were independently measured by three different researchers to investigate whether or not such measurements are reproducible. Additionally, two different software programs were used to measure the three-dimensional vesicle size distributions: the 3D Object Counter plugin for ImageJ and Blob3D. Manual thresholding by each of the authors produced similar results for both samples using both programs; however, use of the automatic, maximum entropy technique for thresholding produced measurably different results because it did not discriminate between vesicles and plagioclase crystals in one case and between vesicles and some cracks in another. Use of asymmetric erosion and dilation processes on the images is shown to affect the vesicle size distribution, but it does not have a significant effect on the power-law exponent that describes intermediate-sized vesicles or on the vesicle number density in these samples. However, such a technique is not recommended.
Type
article
File(s)
No Thumbnail Available
Name
Geosphere_Baker_etal_2011.pdf
Size
801.12 KB
Format
Adobe PDF
Checksum (MD5)
c3bc461957a63dc734d6e63cbbd319a6