Virtual property lines drawing on the monitor for observation of unmanned dam construction site

We have developed ARLINER an observation system to register virtual property lines on a TV monitor at an unmanned dam construction site. The system tracks markers set at regular intervals on the baseline of the site in the input image, calculates the camera parameters from the positions of the detected markers, and registers the property lines in association with the camera motion. We describe the conditions of application at the construction, marker tracking, the registration algorithm for property lines, and practical operation using the system at a dam construction site.