Amped Software is happy to announce that our industry-leading software for photo analysis and tampering detection now includes tools for videos! This is the beginning of a journey that will make Amped Authenticate even more important for the everyday challenges faced by video analysts. This is just the start of video authentication, so stay tuned for more features to come. In the meantime, check out what Amped Authenticate Update 19348 has to offer today for investigating images and videos.
Update to the newest version today or request a free trial if you have not yet tried Amped Authenticate.
See Amped Authenticate’s new features in action:
- Amped Authenticate’s New Video PRNU ToolsThe first tool introduced in the new Video Tools menu is PRNU, which in turn contains three other tools: Create CRP, Identification, and Tampering.
As you probably know, the first step in PRNU analysis is to use pictures captured from a known camera to estimate that camera’s sensor noise. The result of this stage is what we call a Camera Reference Pattern (CRP). At a common 25 fps framerate, one minute of video contains 1.500 still pictures, so one single video can be enough to create a good CRP. As usual, if you have the camera in your hands and you can capture the video, there is some good advice to follow:
- Capture very uniform content (e.g., a blank wall or bright sky)
- Avoid dark or saturated regions (e.g., keep the sun out of the picture)
- Turn off digital stabilization or, when this is not possible, use a tripod to hold the device in a fixed position
- When the device is placed on a tripod, it is mandatory that the recorded scene is flat, to avoid polluting the CRP with content from a fixed scene
- The minimum recommended length is 45 seconds (approximately 1000 frames)
After you create the CRP you can check whether another “evidence” video comes from the same device. This is what the Identification tool is for. Its interface is quite similar to the previous one. You provide the reference CRP and the path to the evidence video. You can limit the analysis to a range of frames, and choose the PRNU extraction mode just as before. When you click Run, Amped Authenticate will compute the PRNU noise from the evidence video and check its correlation against the CRP.
The Tampering tool detects whether parts of your evidence video have been acquired with a different device. To achieve this, it splits the evidence video into chunks and compares each chunk against the provided reference CRP. Once finished, it plots the PCE value obtained for each chunk: the “staircase” shape of the plot reflects the fact that a single PCE value is obtained from a group of frames, and it is then assigned to all of them in the plot. For example, this is the result of a 1200 frames video where the central 400 frames were pasted in from another device of the same model.
Get it now!
If you have an active support plan you can update straight away by going into the menu Help>Check for Updates Online within Amped Authenticate. If you need to renew your SMS plan, please contact Amped Software or an authorized distributor. And remember that you can always manage your license and requests from the customer support portal.
To learn more about how Amped Software’s solutions can help your organization with your image and video investigations, at all levels, contact us: [email protected]