The paper investigates the cause of false positives in sensor attribution, which are linked to Adobe Lightroom or Photoshop. The authors found a periodic pattern in images that caused these false positives, similar to a watermark. The paper also discusses two methods of removing this watermark, one from the image noise component and the other in the pixel domain. It was revealed that Adobe added this pattern to induce dithering. The paper outlines the use of the Photo-Response Non-Uniformity noise (PRNU) for imaging sensor attribution and how the watermark impacts this process.
Publication date: 26 Dec 2023
Project Page: https://arxiv.org/abs/2401.01366v1
Paper: https://arxiv.org/pdf/2401.01366
