Automated tone grading of granite / Clasificación automática de granito según su tono

Catalina Hernández, Juan Carlos and Fernández Ramón, G. (2017). Automated tone grading of granite / Clasificación automática de granito según su tono. "Boletín geológico y minero", v. 128 (n. 2); pp. 271-286. ISSN 0366-0176. https://doi.org/10.21701/bolgeomin.128.2.001.

Description

Title: Automated tone grading of granite / Clasificación automática de granito según su tono
Author/s:
  • Catalina Hernández, Juan Carlos
  • Fernández Ramón, G.
Item Type: Article
Título de Revista/Publicación: Boletín geológico y minero
Date: 2017
Volume: 128
Subjects:
Faculty: E.T.S.I. de Minas y Energía (UPM)
Department: Ingeniería Geológica y Minera
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

The production of a natural stone processing plant is subject to the intrinsic variability of the stone blocks that constitute its raw material, which may cause problems of lack of uniformity in the visual appearance of the produced material that often triggers complaints from customers. The best way to tackle this problem is to classify the product according to its visual features, which is traditionally done by hand: an operator observes each and every piece that comes out of the production line and assigns it to the closest match among a number of predefined classes, taking into account visual features of the material such as colour, texture, grain, veins, etc. However, this manual procedure presents significant consistency problems, due to the inherent subjectivity of the classification performed by each operator, and the errors caused by their progressive fatigue. Attempts to employ automated sorting systems like the ones used in the ceramic tile industry have not been successful, as natural stone presents much higher variability than ceramic tiles. Therefore, it has been necessary to develop classification systems specifically designed for the treatment of the visual parameters that distinguish the different types of natural stone. This paper describes the details of a computer vision system developed by AITEMIN for the automatic classification of granite pieces according to their tone, which provides an integral solution to tone grading problems in the granite processing and marketing industry. The system has been designed to be easily trained by the end user, through the learning of the samples established as tone patterns by the user. Keywords: computer vision, granite, natural stone, tone grading.

Funding Projects

TypeCodeAcronymLeaderTitle
Government of SpainFIT380000-2005-157UnspecifiedUnspecifiedUnspecified
Government of SpainFIT-380000-2006-22UnspecifiedUnspecifiedUnspecified

More information

Item ID: 50142
DC Identifier: http://oa.upm.es/50142/
OAI Identifier: oai:oa.upm.es:50142
DOI: 10.21701/bolgeomin.128.2.001
Official URL: http://www.igme.es/boletin/2017/128_2/BGM_128-2_Art-1.pdf
Deposited by: Memoria Investigacion
Deposited on: 25 Apr 2018 11:14
Last Modified: 25 Mar 2019 14:07
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