Hand tracking: Difference between revisions

The foundational milestone occurred in 1977 with the invention of the '''Sayre Glove''', a wired data glove developed by electronic visualization pioneer Daniel Sandin and computer graphics researcher Thomas DeFanti at the University of Illinois at Chicago's Electronic Visualization Laboratory (EVL). Inspired by an idea from colleague Rich Sayre, the glove used optical flex sensors—light emitters paired with photocells embedded in the fingers—to measure joint angles and finger bends. Light intensity variations were converted into electrical signals, enabling basic gesture recognition and hand posture tracking for early VR simulations.<ref name="SayreGlove" /><ref name="SenseGlove" /> This device, considered the first data glove, established the principle of measuring finger flexion for computer input.

In 1983, Gary Grimes of Bell Labs developed the '''Digital Data Entry Glove''', a more sophisticated system patented as an alternative to keyboard input. This device integrated flex sensors, touch sensors, and tilt sensors to recognize unique hand positions corresponding to alphanumeric characters, specifically gestures from the American Sign Language manual alphabet.<ref name="BellGlove" />

The 1980s saw the emergence of the first commercially viable data gloves, largely driven by the work of Thomas Zimmerman and [[Jaron Lanier]]. Zimmerman patented an optical flex sensor in 1982 and later co-founded VPL Research with Lanier in 1985. VPL Research became the first company to sell VR hardware, including the iconic '''DataGlove''', which was released commercially in 1987.<ref name="VPL" /><ref name="VirtualSpeech" /> The DataGlove used fiber optic cables to measure finger bends and was typically paired with a [[Polhemus]] magnetic tracking system for positional data. This became an iconic symbol of early VR technology.

In 1989, Mattel released the '''Nintendo [[Power Glove]]''', a low-cost consumer version licensed from VPL Research, which used resistive ink flex sensors and ultrasonic emitters for positional tracking. This was the first affordable, mass-market data glove for consumers, popularizing the concept of gestural control in gaming.<ref name="PowerGlove" />

Throughout the 1990s, hand tracking advanced with the integration of more sophisticated sensors into VR systems. Researchers at MIT's Media Lab built on the Sayre Glove, incorporating electromagnetic and inertial measurement unit (IMU) sensors for improved positional tracking. These systems, often tethered to workstations, supported rudimentary interactions but were limited by wiring and low resolution. The '''CyberGlove''' (early 1990s) by Virtual Technologies used thin foil strain gauges sewn into fabric to measure up to 22 joint angles, becoming a high-precision glove used in research and professional applications.<ref name="AvatarAcademy" />