AR Musical Tutorials With Finger Tracking on Smart Eyewear

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Solution Overview

Problem

Real-time finger tracking and virtual object display in augmented reality for musical instruments is challenging due to the processing intensity and complexity of computer vision tasks, particularly in wearable devices like smart glasses.

Innovation Solution

A system for augmented reality on eyewear devices that includes cameras, processors, and displays, capable of capturing depth information, registering markers on instruments, and rendering virtual tutorial objects in real-time, with hand tracking and fingertip coordination feedback.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If real-time finger tracking and virtual object display are implemented in augmented reality for musical instruments, then user guidance and tutorial effectiveness are improved, but processing intensity and device complexity increase

Engineering Contradiction:

Improvetutorial effectivenessVSAvoidprocessing complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The system segments the complex computer vision task into distinct modules: hand detection, finger tip identification, and virtual object rendering. Each module processes specific aspects independently, reducing overall processing complexity while maintaining tutorial effectiveness.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent introduces intermediate processing steps between raw camera input and final virtual object display. Marker detection serves as an intermediary that simplifies subsequent finger tracking by providing reference points, thereby reducing the computational burden on the device.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Measurement precision

If advanced computer vision algorithms are used for hand and finger recognition, then tracking accuracy is improved, but processing time and computational load increase

Engineering Contradiction:

Improvefinger tracking accuracyVSAvoidprocessing time

Core Design Contradiction:

Measurement precisionVSLoss of time

Solution Approach 1:

The system performs preliminary actions by detecting markers on the instrument before initiating finger tracking. This pre-processing step establishes reference frames and reduces the search space for finger detection, thereby improving accuracy without significantly increasing total processing time.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The patent implements partial action by focusing computational resources only on relevant regions of the image frame where hands and fingers are likely to appear. Rather than processing the entire image at high resolution, the system applies computer vision algorithms selectively to reduce processing time while maintaining tracking accuracy.

Inventive Principle:

Principle #16Partial or excessive action

Data Source

PatentUS12525139B2Virtual tutorials for musical instruments with finger tracking in augmented reality

Publication Date: 2026.01.13 SNAP INC

AI summary

Systems, devices, media, and methods are described for presenting a tutorial in augmented reality on the display of a smart eyewear device. The system includes a marker registration utility for setting a marker on a musical instrument, a localization utility, a virtual object rendering utility for presenting virtual tutorial objects on the display near the instrument, and a hand tracking utility for tracking the performer's finger locations in real time. The virtual tutorial objects, in one example, includes graphical elements presented on a virtual scroll that appears to move toward the instrument at a speed correlated with the song tempo. The hand tracking utility calculates a set of expected fingertip coordinates based on a detected hand shape.