This invention describes a system for training shooting skills, potentially using virtual or augmented reality. It works by using a digital camera to capture an image of a target. The system then calculates the distance to the target by dividing the target's known real-world size (in millimeters) by how large it appears in the camera's view (in milliradians), yielding a range in meters. This calculated distance is then used by a shooting application to provide aiming assistance.
Why it matters: Filed before the latest generation of head-mounted AR/VR devices with enhanced integrated cameras and processing power became widely available. These advancements now make real-time, accurate geometric ranging and ballistic calculations more feasible directly within a compact, wearable system.
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