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A microscopic information system (MIS) for petrographic analysis
Language
English
Obiettivo Specifico
2.3. TTC - Laboratori di chimica e fisica delle rocce
3.5. Geologia e storia dei vulcani ed evoluzione dei magmi
5.3. TTC - Banche dati vulcanologiche
Status
Published
JCR Journal
JCR Journal
Peer review journal
Yes
Title of the book
Issue/vol(year)
5/36(2010)
Publisher
Elsevier
Pages (printed)
665-674
Issued date
May 2010
Last version
http://hdl.handle.net/2122/5791
Abstract
The database and visualization facilities of Geographic Information System (GIS) software are employed to support the analysis of rock texture from thin section by image processing. A Microscopic Information System (MIS) is hence obtained. The method is applied to transmitted light images of 137 samples obtained from 8 granitoid rocks. A slide scanner and a mount for crossed polarization are used to acquire the input images. For each thin section 5 collimated RGB images are scanned: 4 under different directions of crossed polarization and 1 without polarization. A grain segmentation procedure, based on two region growing functions is applied. The output is converted to vector format and refined using editing tools in the MIS environment, which enables a straightforward match between the input imagery and the final vectorized texture. GIS software provides optimal management of the MIS database, allowing the cumulative measurement of more than 87,000 grains.
Type
article
File(s)
No Thumbnail Available
Name
C&G_Tarquini_etal_2010.pdf
Size
3.75 MB
Format
Adobe PDF
Checksum (MD5)
7fca440bab0648b0854dec6030a60e25