Digital image processing of weathered stone for determining the optimum cleaning level of stonework

Humanyun, Reza; Zhang, Hexin; Zhang, Ben

Abstract

In this study, the authors introduced a new image component sampling technique that can be used to evaluate level of cleaning of weathered masonry stone for historic buildings. The proposed technique is based on the Standard Pattern (SP). The images taken from different stages of cleaning are used to setup the SP and empirical model to predict the level of cleaning against the duration of cleaning. With the model and SP, Pollution Density Index (PDI) from the image of a building can be evaluated. An optimum cleaning duration can be calculated for each area base on PDI distribution on the surface of the building. The proposed method has been proved to be effective and easy to implement. It can be applied to different way of cleaning.

Citation

Humanyun, R., Zhang, H., & Zhang, B. (2012, July). Digital image processing of weathered stone for determining the optimum cleaning level of stonework. Presented at 14th International Conference and Exhibition on Structural Faults and Repair

• Conference Name: 14th International Conference and Exhibition on Structural Faults and Repair
• Start Date: Jul 3, 2012
• End Date: Jul 5, 2012
• Acceptance Date: Feb 6, 2012
• Online Publication Date: Jul 5, 2012
• Publication Date: Jul 5, 2012
• Deposit Date: Apr 26, 2017
• Book Title: 14th International Conference and Exhibition on Structural Faults and Repair
• Chapter Number: 1
• Keywords: Building conservation; Stone cleaning; Image analysis; Stereovision
• Public URL: http://researchrepository.napier.ac.uk/Output/832259