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Depth perception is the ability to perceive objects three-dimensionally. It relies on two types of cues: binocular and monocular. Binocular cues depend on the combination of images from both eyes and how the eyes work together. Since the eyes are in slightly different positions, each eye captures a slightly different image. This disparity between images, known as binocular disparity, helps the brain interpret depth. When the brain compares these images, it determines the distance to an object.
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PPAP: Perspective Projection Augment Platform with Pan-Tilt Actuation for Improved Spatial Perception.

JungHyun Byun1, Tack-Don Han2

  • 1Department of Computer Science, Yonsei University, Yonsei-ro 50, Seodaemun-gu, Seoul 03722, Korea. junghyun.byun@msl.yonsei.ac.kr.

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Summary

This study introduces an augmented reality platform with an actuated projector for dynamic user-perspective projection. This technology enhances depth perception and spatial understanding of virtual objects in augmented reality scenes.

Keywords:
human–computer interactionprojection mappingspatial augmented realityvirtual depth perception

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Area of Science:

  • Computer Vision
  • Human-Computer Interaction
  • Augmented Reality

Background:

  • Traditional augmented reality (AR) systems often struggle with accurate spatial perception.
  • Stationary projection methods limit viewing angles and can distort the perceived depth of virtual objects.

Purpose of the Study:

  • To develop and evaluate an augmented reality platform (PPAP) that utilizes an actuated projector for dynamic user-perspective projection.
  • To improve the user's understanding of spatial relationships, particularly depth perception, in AR environments.

Main Methods:

  • Proposed PPAP system integrating a stationary camera with a pan-tilt motorized projector-camera unit.
  • Employed servo control for the projector-camera system to dynamically match the user's view center.
  • Conducted user studies assessing the perception of size and distance of projected virtual objects.

Main Results:

  • The actuated projector system significantly widened viewing angles compared to stationary projection.
  • Users demonstrated improved depth perception and a better understanding of spatial relationships for virtual objects.
  • Perspective projection with the actuated projector enhanced the user's spatial awareness in the augmented scene.

Conclusions:

  • PPAP offers a novel approach to AR by enabling dynamic user-perspective projection.
  • The system effectively enhances the user's ability to perceive depth and spatial relationships in augmented reality.
  • Actuated projection technology holds significant potential for improving immersive and intuitive AR experiences.