install

Additional install commands

macOS

Homebrewverified · 100%

brew install grt

local Homebrew formula metadata

overview

Package summary

Gesture Recognition Toolkit for real-time machine learning

Project links

Commands and aliases

grt-lin-reg-tool
grt-log-reg-tool
grt-merge-tool
grt-mlp-tool
grt-rf-tool
grt-softmax-tool
grt-split-tool
grt-svm-tool
grt-test-tool

history

Project history and usage

The Gesture Recognition Toolkit, or GRT, is an open-source C++ machine-learning toolkit for real-time gesture recognition. Its research paper and project documentation emphasize accessibility for non-specialists building interactive systems from sensor data.

Project history

GRT grew out of Nicholas Gillian and Joseph A. Paradiso's work at the MIT Media Lab Responsive Environments Group and was described in a 2014 Journal of Machine Learning Research paper. The paper presents it as a cross-platform C++ library for real-time gesture recognition, feature extraction, automatic gesture spotting, classification, regression, and clustering.

The GitHub repository was created in January 2014 and the public release stream on GitHub includes version 0.1.0 in February 2016, 0.2.0 in August 2016, and 0.2.4 in December 2016. The repository README describes both a C++ API and GUI, plus .grt and CSV data/model files.

Adoption history

GRT found a niche in creative coding, interactive music, sensor interfaces, and human-computer interaction rather than broad systems administration. Its README lists extensions and users such as ofxGrt for openFrameworks, ml-lib for Max and Pure Data, and ESP, showing adoption through research and media-arts tooling.

How it is used

The Homebrew package exposes small command-line tools for common models and data preparation tasks, while the library itself is normally embedded in C++ projects. Users build pipelines from preprocessing, feature extraction, and classifier modules, train models from labeled sensor data, and run predictions in real time.

Why package nerds care

GRT is interesting in package-manager culture because it packages academic interactive-machine-learning work as a reusable native library plus command-line helpers. It sits at the boundary between research code, creative-coding ecosystems, and reproducible Unix installation.

Timeline

2014: GRT described in the Journal of Machine Learning Research.
2014: GitHub repository created for nickgillian/grt.
2016: GRT Version 0.1.0 published on GitHub releases.
2016: GRT Version 0.2.0 published.
2016: GRT Version 0.2.4 published.

Related projects

ofxGrt integrates GRT with openFrameworks.
ml-lib uses GRT concepts in Max and Pure Data contexts.
ESP is listed by the GRT project as an application using GRT as a backend machine-learning system.

Sources

security posture

Risk level: green

narrow executable package without higher-risk signals.

Risk classifier

green risk · low confidence · appliance

Why

narrow executable package without higher-risk signals

Signals

metadata:no-higher-risk-signals

Install behavior

No Homebrew post-install hook is recorded in formula metadata.
Homebrew bottle metadata is available for 13 platform targets.
Build metadata lists 1 build dependencies.

Recommended review

Before unattended agent use, check whether the tool reads plaintext credentials, writes remote state, publishes artifacts, or shells out to plugins.

executables

Installed executables

Command	Kind	Exposure
`grt-lin-reg-tool`	cli	global executable
`grt-log-reg-tool`	cli	global executable
`grt-merge-tool`	cli	global executable
`grt-mlp-tool`	cli	global executable
`grt-rf-tool`	cli	global executable
`grt-softmax-tool`	cli	global executable
`grt-split-tool`	cli	global executable
`grt-svm-tool`	cli	global executable
`grt-test-tool`	cli	global executable

freshness

Version and freshness

These signals separate page generation age, package-manager activity, and upstream release comparison. Version lag is warned only when an evidence URL and comparable versions are present.

page generated2026-07-08

manager version0.2.4

manager updated

local dataok

upstreamcurrent

latest detectedv0.2.4

https://github.com/nickgillian/grt

infoNo package-manager update timestamp was available.low confidence

install metadata

Package metadata

Package key	brew:grt
Version	0.2.4
Package manager	Homebrew
Package manager page	https://formulae.brew.sh/formula/grt
Homepage	https://nickgillian.com/grt/
Repository	https://github.com/nickgillian/grt
Upstream docs	https://nickgillian.com/grt
License	MIT
Source archive	https://github.com/nickgillian/grt/archive/refs/tags/v0.2.4.tar.gz
Build dependencies	cmake
Bottle	available (on arm64_big_sur, arm64_linux, arm64_monterey, arm64_sequoia, arm64_sonoma, arm64_tahoe, arm64_ventura, big_sur, catalina, monterey, sonoma, ventura, x86_64_linux)
Homebrew post-install	not defined
Service	none declared

registry facts

Source database details

Source Database	Homebrew formula API
Tap	homebrew/core
Full Name	grt
Version Scheme	0
Revision	0
Bottle Stable Root URL	https://ghcr.io/v2/homebrew/core
Deprecated	no
Disabled	no
Keg Only	no
URL Keys	stable

package graph

Links come from deterministic package relationships, av.db category and tag curation, ecosystem matches, and package hub membership.

source trail

Generated from repository data

This page is generated by av-web from the private package SQLite artifact built by scripts/generate-pkg-sqlite.py.

Combined YAML source

View the package source record on GitHub.

combined/grt.yml

Used sources

Geiger risk classifier
Nucleus package database
av.db category and tag curation
cross-ecosystem install command graph
curated package history
package relationship graph
package version freshness
package-page enrichment

Install grt with Homebrew