Figure 7From: High-precision vision-based mobile augmented reality system for context-aware architectural, engineering, construction and facility management (AEC/FM) applicationsExample of HD4AR 3D annotation. (a) User marks a window on the localized photograph, (b) HD4AR automatically finds correspondences of window for each base image, (c) The system triangulates the window using camera information of base images and the localized photograph, (d) A user-created window element is precisely overlaid on other photographs from different viewpoints.Back to article page