Towards Reversible De-Identification in Video Sequences Using 3D Avatars and Steganography
This addresses privacy concerns for video surveillance or sharing, but it appears incremental as it combines existing techniques like 3D rendering and steganography.
The paper tackles privacy protection in videos by replacing humans with rendered 3D avatars and steganographically encoding the original images into the scene, with qualitative evaluation showing reasonably good results.
We propose a de-identification pipeline that protects the privacy of humans in video sequences by replacing them with rendered 3D human models, hence concealing their identity while retaining the naturalness of the scene. The original images of humans are steganographically encoded in the carrier image, i.e. the image containing the original scene and the rendered 3D human models. We qualitatively explore the feasibility of our approach, utilizing the Kinect sensor and its libraries to detect and localize human joints. A 3D avatar is rendered into the scene using the obtained joint positions, and the original human image is steganographically encoded in the new scene. Our qualitative evaluation shows reasonably good results that merit further exploration.