LiPro: displaying concurrent image viewing and imperceptible positioning using visible light

Area of Science:

• Optoelectronics
• Human-Computer Interaction
• Computer Vision

Background:

• Visible light projectors are crucial for human interaction but face challenges in simultaneous target positioning and image viewing.
• Existing systems compromise either visual display quality or positioning accuracy, limiting real-world applicability.

Purpose of the Study:

• To develop a novel smart lighting-based projector system (LiPro) capable of simultaneous imperceptible target positioning and image viewing.
• To address the limitations of current visible light projectors in practical applications.

Main Methods:

• Proposed a novel color space conversion modulation scheme using YCbCr analysis to transmit landmark information imperceptibly.
• Implemented a dual-channel decision demodulation scheme for accurate landmark recognition.
• Utilized off-the-shelf devices for system implementation and performance evaluation.

Main Results:

• The LiPro system successfully achieves simultaneous imperceptible target positioning and any image viewing.
• Experimental results demonstrate centimeter-level target positioning accuracy.
• The proposed modulation and demodulation schemes ensure human eye imperceptibility to luminance changes.

Conclusions:

• LiPro offers a practical solution for visible light projectors by integrating target positioning with image viewing.
• The system demonstrates high accuracy and robustness in real-world scenarios.
• This advancement has significant implications for interactive display technologies.