Watching the watchers: Camera identification and characterization using retro-reflections - Dataset

A focused imaging system such as a camera will reflect light directly back at a light source in a retro-reflection (RR) or cat-eye reflection. RRs provide a signal that is largely independent of distance providing a way to probe cameras at very long ranges. We find that RRs provide a rich source of information on a target camera that can be used for a variety of remote sensing tasks to characterize a target camera including predictions of rotation and camera focusing depth as well as cell phone model classification. We capture three RR datasets to explore these problems with both large commercial lenses and a variety of cell phones. This repository contains time-synced videos from the perspective of both a retro-reflective probe and a target camera that can be used to train algorithms for different remote sensing tasks. We include a dataset for cellphone classification, target camera rotation prediction, and target camera focusing depth prediction., , , # Watching the watchers: Camera identification and characterization using retro-reflections - Dataset

[https://doi.org/10.5061/dryad.6t1g1jx64](https://doi.org/10.5061/dryad.6t1g1jx64)

## Description of the data and file structure

This dataset was used to generate results in the paper titled \"Watching the watchers: Camera identification and characterization using retro-reflections\"

The data folder contains the datasets for the Phone classification and Focus_and_rotation experiments.

data\Focus_Rotation\raw_data\angles: contains the paired videos from the viewpoint of the probe and target camera. The target camera video is used to calculate the rotation angle of the target camera. The probe video is the view from the probe and can be used to predict the target camera's rotation.

data\Focus_Rotation\raw_data\focus contains videos for different settings of a commercial lens on a rotating target camera.

data\PhoneData contains the data relevant for the phone classification experiment...