Glossary

• Sensor An image sensor of a physical digital camera.

• Image Pixel data and meta-data generated by a sensor.

• Camera A shot taken by a sensor with a given pose (position and orientation).

• Capture An image acquisition event represented as a set of the participating cameras combined with spatial and temporal information.

• Camera ID A unique identifier of a camera determined as a function of the image content of the camera.

• Camera model database A database of physical camera models and their pre-calibrated internal parameters.

• Input camera A camera with the pieces of information it represents in their original form, that is, as they were captured or registered in the camera model database.

• Projected camera An input camera spatially adjusted with respect to the chosen projected coordinate reference frame.

• Calibrated camera A camera whose internal and external parameters are calibrated.

• Calibration The process of calibrating cameras and reconstructing the captured scene as a sparse 3D point cloud.

• Densification The process of obtaining a densified point cloud from a sparse point cloud and calibrated cameras.