Alert system based on camera identification

摘要

Some embodiments of the application provides methods and systems for receiving image frames from a plurality of repositories, extracting a camera fingerprint for each of the image frames, storing the camera fingerprints in a directory, receiving a new image frame from one of the plurality of repositories and extracting a new camera fingerprint corresponding to the new image frame, comparing the new camera fingerprint to each of the stored camera fingerprint, and generating an alert if a match is determined between the new camera fingerprint and at least one of the stored camera fingerprints in the directory.

主权项

1. A method, comprising:
receiving a first camera-recorded image frame from at least one of a plurality of public repositories; receiving a second camera-recorded image frame from at least one of the plurality of public repositories, wherein the second camera-recorded image frame includes content different from the first camera-recorded image frame; using the first and second camera-recorded image frames, extracting a camera fingerprint that is associated with a pixel to pixel comparison of the first camera-recorded image frame to the second camera-recorded image frame and is uniquely representative of a camera imperfection associated with at least one semiconductor imperfection of a pixel of a camera sensor of a camera that recorded each of the first camera-recorded image frame and the second camera-recorded image frame, the camera fingerprint being undamaged by alteration; storing the camera fingerprint in a directory; receiving a new camera-recorded image frame from one of the plurality of public repositories, wherein the new camera-recorded image frame includes new content differing from the content of the first camera-recorded image frame and the second camera-recorded image frame; extracting a new camera fingerprint corresponding to the new camera-recorded image frame; comparing the new camera fingerprint to the stored camera fingerprint; and generating an alert if a match is determined between the new camera fingerprint and the stored camera fingerprint in the directory, the alert generated in response to the new camera fingerprint matching the stored camera fingerprint above a variable threshold.