Construction Site Person Tracking via Image and Terrain Data Fusion

The system divides the position specification task into multiple independent modules: image data acquisition unit, terrain data storage unit, person specifying unit, two-dimensional position specifying unit, and three-dimensional position specifying unit. Each module handles a specific aspect of the problem, making the complex system manageable and maintainable while achieving high precision through their coordinated operation.

The system transitions from two-dimensional image coordinates to three-dimensional real-world positions by integrating terrain elevation data. The three-dimensional position specifying unit uses the two-dimensional position from the image and combines it with terrain height information to calculate the full three-dimensional coordinates, adding a vertical dimension to the position specification.

The system implements periodic monitoring by capturing image data at regular intervals rather than continuous monitoring. The image data acquisition unit periodically acquires new images, and the processing units periodically update position specifications, providing real-time monitoring capability while allowing energy-saving intervals between measurements.

The system uses the existing terrain data that is already stored in the terrain data storage unit (likely from previous surveys or mapping operations) without requiring additional energy-consuming measurements. By reusing pre-acquired terrain information, the system avoids the energy cost of repeated terrain scanning while still achieving accurate three-dimensional position calculation.