Concrete-crack monitoring using digital image processing techniques

Cracks in concrete and plaster were analyzed until now by use of a crack width rulers or a measurement lens. The major problems of these methods are subjectivity low accuracy, less traceability and major difficulties in documentation. The application of digital image processing techniques for in-situ measurements are promising, especially for gaining higher accuracy and objective documentation. This paper presents a method for the digital assessment of a concrete surface. Already sufficient results were reached even by using a usual digital camera and a standard software. Therefore it is easy to apply in practice. In this paper the general application of crack measurment is shown. For the used mathematical algorithms it is relegated to according references.