The last decade or so has seen an increase in the use of 3D data for modelling and representation reasons. Since 3D data is so valuable, it has also demanded new approaches to protect the rights of the creators and prevent unlawful use or modification. The multi-DRM approaches used in DRM protected content can simply be applied to 3D scene descriptions since 3D representation is totally digital.
Despite this, data concealment is an exception to the rule when it comes to 3D DRM methods. Video watermarking in 2D multimedia can’t readily be applied to 3D content. Watermarking 3D video files necessitates a thorough examination of the file’s different features, including the colour channel, stereo objects, and depth perspective.
Spatial domain watermarking and frequency domain watermarking are the two basic types of video watermarking. As opposed to changing the pixels directly, spatial watermarking methods modify the coefficients of the processed video frames in accordance with a predetermined embedment scheme. The frequency-domain efficiency of 3D watermarking is comparable to that of 2D watermarking.
In general, 3D watermarking techniques can be divided into the following categories:
Geometry, texture, and a map defining the relationship between geometry and texture are all taken into account while creating a geometry watermark. In rendering applications, these components are utilised to build an arbitrary view in relation to the lighting conditions of a scene.
When a 3D object is rendered into 2D photos or movies (after being projected into 2D image planes), the watermark that was initially hidden in the texture of the object is extracted, therefore securing any visual depiction of the object.
Image-based Here, the scene is represented just by its 2D projection, which are photos acquired by cameras. It is possible to watermark image sequences that record a 3D scene and extract the watermark from any rendered image generated for any arbitrary view angle, as opposed to the first two methods, which only protect the watermark information for the two key components of 3D scene representation (geometry and texture).
If you’re using dynamic watermarking, you may embed information on the video asset while it’s being played back at the user’s end, such as the user’s email, date and time of watching, their IP address, or even their business logo. Because of their dynamic nature, they provide additional protection for confidential content that is not intended to be shared or altered. DAI (dynamic ad insertion) is also activated via dynamic watermarking in order to optimise addressable ad income. DRM video protection techniques such as watermarks are not sufficient on their own, but when used in conjunction with other measures, they can help to safeguard the intellectual property of the content owner and aid to trace the source of any alleged infringement. They also serve as a helpful reminder to users about their own and others’ rights to the content they’re using.