Dr. Xinhai Zhang Profile

Dr. Xinhai Zhang

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Proceedings Article | 14 August 2024 Paper

Low-cost contact-free screen control based on machine vision

Yangbing Lin, Teng Wang, Wei Yan, Xiao Peng, Xinhai Zhang

Proceedings Volume 13248, 132480R (2024) https://doi.org/10.1117/12.3033346

KEYWORDS: Cameras, Displays, Logic, Infrared lasers, Calibration, Machine vision, Reflection, Imaging systems, Human computer interaction, Sensors

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Contact-free manipulation technology represents a novel approach that offers a fresh possibility for human-machine interaction, aiming to meet the evolving demands of this interface. In this paper, we introduce a contact-free planar display control technique based on imaging. In our research, we employ cameras as sensors and integrate infrared lasers with image processing techniques to detect and localize input signals. By establishing a coordinate mapping relationship between the operational plane and the display plane, we achieved contact-free control over the planar display. Our paper introduces two methods for establishing this coordinate mapping. The first involves constructing mapping functions between the rectified and transformed camera imagery and the display plane, thereby creating a point-to-point correspondence. The second method entails dividing both the camera imagery and the display plane into segments, establishing a one-to-one relationship between regions. We analyze the strengths and limitations of these two approaches. While the former boasts higher theoretical precision, it is more susceptible to equipment factors and exhibits slower response speeds. Conversely, the latter, despite its lower theoretical precision, offers faster response times. Through the setup of an experimental platform, we demonstrate the feasibility of our proposed.

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