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Sensors 2018, 18(9), 3063; https://doi.org/10.3390/s18093063

Display in the Wild (DIW): An Adaptive Projection-Imaging System to Screen Geometry in Real Time

Department of Computer Science and Engineering, Kyung-Hee University, Gyeonggi-do 17104, Korea
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Received: 25 July 2018 / Revised: 6 September 2018 / Accepted: 7 September 2018 / Published: 12 September 2018
(This article belongs to the Section Intelligent Sensors)
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Abstract

TVs and monitors are among the most widely used displays in various environments. However, they have limitations in their physical display conditions, such as a fixed size/position and a rigid/flat space. In this paper, we suggest a new “Display in the Wild” (DIW) concept to overcome the aforementioned problems. Our proposed DIW system allows us to display a flexibly large screen on dynamic non-planar surfaces at an arbitrary display position. To implement our DIW concept practically, we choose a projector as the hardware configuration in order to generate a screen anywhere with different sizes. However, distortion occurs when the projector displays content on a surface that is dynamic and/or non-planar. Therefore, we propose a distortion correction method for DIW to overcome the aforementioned surface constraints. Since projectors are not capture devices, we propose using a depth camera to determine the distortions on the surfaces quickly. We also propose DIW-specific calibration and fast/precise correction methods. Our calibration method is constructed to detect the projection surface easily and quickly, and also allows our proposed system to accommodate the intrinsic parameters such as a display resolution and field of view. We accomplish a fast undistortion process of the projector by considering only surface boundary pixels, which enables our method to run in real time. In our comprehensive experiments, the proposed DIW system generates undistorted screens such as TVs and monitors on dynamic non-planar surfaces at an arbitrary display position with Unmanned Aerial Vehicles (UAVs) in a fast and accurate manner, demonstrating its usefulness in practical DIW scenarios.
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Keywords: TV; monitor; projector distortion; distortion correction; calibration; depth camera; Unmanned Aerial Vehicles; UAVs; display TV; monitor; projector distortion; distortion correction; calibration; depth camera; Unmanned Aerial Vehicles; UAVs; display
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    Description: A Video demo for Display In the Wild (DIW): An Adaptive Projection-Imaging System to Screen Geometry in Real Time.
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Ryu, B.; Bae, S.-H. Display in the Wild (DIW): An Adaptive Projection-Imaging System to Screen Geometry in Real Time. Sensors 2018, 18, 3063.

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