A novel technique creates a mosaic image from a secret image, making it appear like a chosen target image. Skilled color transformation ensures nearly lossless secret image recovery. Overflows/underflows are managed by recording color differences in the original space. Embedded information allows lossless secret image retrieval, validated through successful experiments.

• Image Processing
• Information Retrieval
• Steganography

Traditional libraries offer an Online Public Access Catalog (OPAC) for searches, but the call number response lacks guidance, leading to challenging searches, especially in large multi-level libraries. Our project introduced panorama-based navigation, guiding patrons with interior panoramas to resources, eliminating the need for extra hardware like sensors and tags.

• Information Retrieval
• Library Technology
• User Experience (UX)