Displacement measurement based on image processing method by using laser and digital camera

Image processing systems are currently used in construction, biomedical, traffic, test, measurement and so on many areas are used. Especially in the field of displacement measurement, which is one of the basic problems encountered in civil engineering, gives promising results. The purpose of this thesis is to find the movement profile of an object moving horizontally and vertically along with the software developed by using laser pointer, digital camera and basic image processing techniques and accordingly to find the total displacement. One of the other aims of the study is to use an alternative displacement calculation technique in the field of building science as an alternative to non-contact displacement measurements made by conventional methods. One high-resolution digital camera to determine the displacement, a specially designed shake table for the actual displacement, and a laser pointer to track the projection by the camera. The static and dynamic displacement motion profiles applied by the shake table as the reference motion profile were tried to be found as the result of image processing software. On the one hand, video recordings of the digital camera were taken while the positions of the shake table were recorded during the applied motion profiles. The video recordings were converted to motion profiles by post processing and compared with the shake table position data recorded for the applied movements. For the similarity of dynamic movements, the correlation of the two motion profiles, which occur in the shake table and the image processing result, was calculated. For the similarity of the static movements, the relative error rate of the image processing software was calculated according to the movement of the shake table. Moreover, the success of system was tested with various test setups that were established and the results were compared to the reference test assembly. Thus, it is considered that the developed system will be an alternative as a more useful system for researchers working in the field.