Abstract
In this study, towards implementation of surveillance cameras as an optical infrastructure health monitoring system, camera pair consists of different formats are considered. In contrast to the typical three dimensional digital image correlation system; whenever surveillance system is implemented as optical capture devices, optics and sensors of the camera pairs are not always identical. Gray levels, spatial resolutions, fields of view, synchronization and sizes of captured images might be different; the obtained images must be normalized into same format by image transformations with preobtained CCD camera calibration data and geometrical relations before the images analyzed by DIC method. To perform the experiments, a home-made imaging system consists of three camera are first implemented. Two of the cameras have the same optical head but the other is different. A cylindrical tube is used as the specimen, capturing images before and after moving the cylindrical tube. All captured images of different cameras are combined into three different image-pairs and then analyzed by commercial 3D-DIC software to evaluate mean displacement U, V, W, and the associated strain ε xx , ε yy , ε xy to evaluate the potential concerns while different cameras are used for displacement determination.