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Article Dans Une Revue Sensors Année : 2023

Head-Mounted Miniature Motorized Camera and Laser Pointer Driven by Eye Movements

Résumé

Recording a video scene as seen by an observer, materializing where is focused his visual attention and allowing an external person to point at a given object in this scene, could be beneficial for various applications such as medical education or remote training. Such a versatile device, although tested at the experimental laboratory demonstrator stage, has never been integrated in a compact and portable way in a real environment. In this context, we built a low-cost, light-weight, head-mounted device integrating a miniature camera and a laser pointer that can be remotely controlled or servo-controlled by an eye tracker. Two motorizations were implemented and tested (pan/tilt and Rilsey-prisms-based). The video was both recorded locally and transmitted wirelessly. Risley prisms allowed finer remote control of camera or laser pointer orientation (0.1° vs. 0.35°), but data processing and Wi-Fi transmission incur significant latency (~0.5 s) limiting the servo-controlling by eye movements. The laser beam was spatially shaped by a Diffractive Optical Element to facilitate object illumination or recognition. With this first proof-of-concept prototype, the data stream needs to be optimized to make full use of the eye tracker, but this versatile device can find various applications in education, healthcare or research.
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hal-04593832 , version 1 (30-05-2024)

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Vincent Nourrit, Jean-Baptiste Lamour, Bernard Abiven, Bruno Fracasso, Jean-Louis de Bougrenet de la Tocnaye. Head-Mounted Miniature Motorized Camera and Laser Pointer Driven by Eye Movements. Sensors, 2023, 23 (7), pp.3503. ⟨10.3390/s23073503⟩. ⟨hal-04593832⟩
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