PROVIPS

Development of an automated classification system for polished stone slabs and tiles

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 Obiettivo del progetto (Objective)

'Limitations in quality control performance represent an obstacle in evolution of the Stone Processing Industry. A way to automated surface analysis is pivotal in realising improved product quality and greater operational efficiency thus reducing the environmental impact of stone processing and reducing product’s time to market. Such improvements are considered to be of major significance to the European SME proposers to secure existing markets and to develop new opportunities. This project aims to consolidate the technical know-how and bridge the technological gaps to allow the development of an automated classification system for ornamental stone slabs and tiles (PROVIPS) based on the development of an innovative spectral sensor to be used within a new type of spectral camera. Such a capability will help the European stone sector by providing a versatile classification tool for lot appearance standardization according to end-user requirements thus enhancing distribution networks by way of greater acceptability of the product and higher productivity at the stone processing stage. Moreover, the new sensor will allow European Vision System Sector to get the chance to renew their offer on existing markets and to find new markets as well. Basing on the experience gained by the partners the following paths for research and development will be scouted: 1.design and development of the ad-hoc spectral sensor enabling the use of spectral imaging techniques. This sensor will acquire colour according to human perception and will allow an innovative approach to pattern recognition; 2.development of goniometric probe for the multi-directional spectral characterization of the surface to allow multiple position inspection as made by human specialized observer; 3.rationalization of human classification process and development of standard quality and grading features to guide the development of classification algorithms in order to solve the complexity of patterns of natural stone'

Introduzione (Teaser)

Breathing life into the stone and slab industry has come in the form of camera technology that will speed up processing and standardisation.

Descrizione progetto (Article)

Quality is a key determinant in the stone processing industry, and speeding up quality control can help the industry flourish. By reducing time to market, this will help mitigate the environmental impact as well. The EU-funded project 'Development of an automated classification system for polished stone slabs and tiles' (Provips) used spectral sensors and cameras to optimise and quicken quality control, standardisation and classification. In essence, this is aimed at helping the industry increase productivity, save time, eliminate human error and meet client expectations in delivering standardised products.

The project team bridged the gap between industry requirements and technical parameters of the technology, such as camera and sensors required for the project. It outlined necessary classifications and attributes used in inspecting stone tiles and slabs through a new Customised Stone Surface Quality Classification Procedure (CSSQPro). This procedure was integrated into a software programme acquired by the vision system that focuses on the characteristics required by the client and can be configured for different cases and clients.

The project team developed the first version of the software and tested it with success. It addressed colour systems, pixel structure and other necessary refinements to create a powerful system. A project website was also created to update both the members of the project consortium and the public at large regarding progress achieved. When the system is perfected, quicker and more accurate delivery of stone products to consumers will be realised, giving a major boost to the stone sector and this facet of the economy. In the meantime, faster and more streamlined delivery will mean less of an impact on the environment, adding a green component to this new process.