Based On Digital Image Technology For Automatic Analysis Of The Crack Of Ctructures

It's well known that China is one of the biggest construction countries along with accelerating urbanization in recent two to three decades. As a Chinese ancient proverb goes, something would be wrong at the point of origin, which also can demonstrate the present situation of construction in China. What is meant by that is numerous maintenance works have to be done due to the large amount of construction.There are various reasons causing the damage on construction.The emergence of cracks of structures is the initial omen of the structural damage. From the initial stage, structural cracks which are undistinguishable by naked eyes develop gradually and then contribute to the member damage, structural deformation, systematic instability and the ultimate collapse of the whole structure as well. It is therefore imperative to monitor and analyze cracks of structures for the safety of the project. Whereas the traditional methodology for detecting and analyzing cracks is time-consuming, strenuous and uneconomical. This paper does the automation study of the detection and analysis for cracks of civil structures by utilizing the digital picture technology which develops at a staggering rate in recent years. Which is meant by that is monitoring civil structures by using digital cameras as well as developing relevant programs to process the gained digital pictures for the detection and analysis. The conclusion of this study indicates that this methodology is able to recognize structural cracks automatically as well as to remedy the down sides of the conventional methodology effectively.The conclusions of this research as follows:1. Digital graphic data collection and digital camera calibration technology.2. Utilize MATLAB graphic tool box to develop own graphic process program, which can morphologic process the graphic.3. Extract the profile of cracks in monitoring area, analyze the cracks and calculate the relevant data of cracks.Moreover, the consequence of the detection and analysis is precise and accurate, and what remains remarkable is that the above-mentioned methodology is convenient to operate and suitable for the practical project.