Standard Plenoptic Camera Calibration for a Range of Zoom and Focus Levels
Abstract: Plenoptic cameras have a complex optical geometry combining a main lens, a microlens array and an image sensor to capture the radiance of the light rays in the scene in its spatial and directional dimensions. As conventional cameras, changing the zoom and focus settings originate different parameters to describe the cameras, and consequently a new calibration is needed. Current calibration procedures for these cameras require the acquisition of a dataset with a calibration pattern for the specific zoom and focus settings. Complementarily, standard plenoptic cameras (SPCs) provide metadata parameters with the acquired images that are not considered on the calibration procedures. In this work, we establish the relationships between the camera model parameters of a SPC obtained by calibration and the metadata parameters provided by the camera manufacturer. These relationships are used to obtain an estimate of the camera model parameters for a given zoom and focus setting without having to acquire a calibration dataset. Experiments show that the parameters estimated by acquiring a calibration dataset and applying a calibration procedure are similar to the parameters obtained based on the metadata.
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