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Ortho–para directors are substituent groups attached to the benzene ring and direct the addition of an electrophile to the positions ortho or para to the substituent. All electron-donating groups are considered ortho–para directors. They donate electrons to the ring and make the ring more electron-rich. The ring is therefore susceptible to the addition of electrophiles. Substituents such as amino, hydroxy, or alkoxy, containing lone pairs on the atom adjacent to the ring, donate...
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Combining Augmented Reality and 3D Printing to Display Patient Models on a Smartphone
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Autostereoscopic 3D display using directional subpixel rendering.

Seok Lee, Juyoung Park, Jingu Heo

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    This study introduces a novel autostereoscopic 3D display with real-time, viewer-position-based image rendering. It achieves high 3D image quality across wide viewing angles using a unique optical layer and parallel processing for efficient performance.

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    Area of Science:

    • Computer Science
    • Optics
    • Display Technology

    Background:

    • Autostereoscopic 3D displays require precise rendering of left-right images based on viewer position.
    • Maintaining 3D image quality over a wide viewing range is a significant challenge in display technology.

    Purpose of the Study:

    • To develop an autostereoscopic 3D display system utilizing a directional subpixel rendering algorithm.
    • To enhance 3D image quality and viewing range through a novel optical layer design.
    • To demonstrate a simple and parallelizable 3D rendering method.

    Main Methods:

    • Implemented a directional subpixel rendering algorithm for real-time left-right image generation.
    • Designed an optical layer to create a uniformly distributed light field, ensuring consistent image quality.
    • Developed prototypes (31.5" monitor, 10.1" tablet) with GPU and FPGA processing for the 3D rendering.

    Main Results:

    • Achieved clear left-right images in real-time, adapting to viewer's 3D eye positions.
    • Demonstrated maintained 3D image quality over a wide viewing range due to the uniform light field.
    • Validated the effectiveness of the rendering method and display system through functional prototypes.

    Conclusions:

    • The proposed autostereoscopic 3D display system effectively renders high-quality 3D images in real-time.
    • The directional subpixel rendering and optical layer design are crucial for wide viewing range performance.
    • The system's parallel processing capability makes it suitable for practical implementation in various display devices.