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The paper introduces a novel watermarking scheme to enhance robustness and integrity in medical images using the Knight's Tour algorithm. Medical image digitization and sharing necessitate robust techniques for data security. Existing watermarking methods often lack resilience against attacks and maintain imperceptibility. To address these issues, the proposed scheme employs the Knight's Tour algorithm to determine the optimal pixel locations for watermark embedding. Extensive evaluations demonstrate its effectiveness against geometric attacks, specifically image rotation and scaling. The study's significance lies in providing a reliable solution for safeguarding medical image data, ensuring authenticity, and bolstering trust in healthcare applications. Moreover, the scheme's adaptability extends its significance to multimedia data protection and content authentication. [ABSTRACT FROM AUTHOR]

The integration of Augmented Reality (AR) technology in indoor navigation has transformed spatial awareness and user interaction. This research focuses on "AR@Campus," an AR app designed for campus navigation, aligned with Industry 4.0 principles. It leverages AR to enhance human perception and dynamic digital interaction. The primary goal is to provide an intuitive campus navigation experience using IndoorAtlas positioning technology. Key features include overlaying virtual elements like paths and landmarks onto real-world views, improving spatial understanding. The study covers software development, interface design, and user evaluation, utilizing the IndoorAtlas SDK and Android Studio for precise positioning. The user interface prioritizes ease of use and personalized experiences. User testing is integral, confirming the app's effectiveness, praised for its user-friendly interface and spatial awareness enhancements. AR@Campus represents a significant step forward in campus navigation, benefiting users by seamlessly integrating AR technology into their daily experiences. [ABSTRACT FROM AUTHOR]