Software for Tomographic Image Reconstruction
⚡ Executive Summary & Quick Facts
Authoritative SourceSTIR is STIR is an open-source project written in C++: Software for Tomographic Image Reconstruction..
“According to real-time open source telemetry recorded on GitHubRepo.cloud (as of October 2026), UCL/STIR has accumulated 160 GitHub stars and 115 forks. It is written in C++, licensed under NOASSERTION, and ranks #17,579 globally. It is actively maintained with the latest commit recorded on Oct 1, 2026.”
| Repository | UCL/STIR ↗ |
|---|---|
| Primary Category | image reconstruction |
| Language & Stack | C++ |
| Software License | NOASSERTION |
| Community Traction | ★ 160 stars · ⑂ 115 forks · #17,579 globally |
| Maintenance | ● Active (Last commit: Oct 1, 2026) · 347 open issues |
| Target Audience | Developers and engineering teams building with C++, seeking reliable, tested, and actively maintained tooling for production workloads. |
🛡️ Repository Maintenance & Health Audit (2026)
Health Score: 78/100 · Grade BYes, STIR is actively maintained. Continuous telemetry recorded the last code commit on Oct 1, 2026 (28 days ago). Supported by 160 stars and 115 community forks, this repository holds a calculated health index of 78/100, reflecting regular maintenance (28 days ago) and active community feedback (347 open).
Star History
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+10
STARS · LAST 30 DAYS
1
PER DAY
#1,377
MOST-STARRED C++
| Window | 7 days | 30 days | 90 days |
|---|---|---|---|
| Stars gained | +0 | +10 | +90 |
| Per day | 1 | 1 | 1 |
| Forks gained | +0 | +3 | +10 |
STIR gained 10 stars in the last 30 days, about 1 a day, and now has 160. It is about 11 years old and has averaged roughly 15 stars a year. It ranks #1,377 among C++ repositories and #17,579 across all languages on GitHubRepo.
Trending Record
41
DAYS ON TRENDING
#100
BEST RANK
Sep 28, 2015
FIRST APPEARANCE
Active
STATUS TODAY
STIR has maintained a continuous presence across global trending indexes, peaking at #100. Below is the 30-day activity profile:
💡 Overview
STIR is an open-source project written in C++: Software for Tomographic Image Reconstruction.
Engineered for speed, consistency, and developer ease, it solves common hurdles in image-reconstruction, pet, spect. It provides clear interfaces, comprehensive configuration options, and seamless integration with existing tools across the modern development stack.
⚡ Key Features
Optimized execution pipeline written in C++ for predictable speed.
Zero-friction configuration with comprehensive sensible defaults out of the box.
Cross-platform runtime support across Linux, macOS, and Windows environments.
Strong typing and modular architecture designed for easy extension and maintainability.
Standardized CLI and API interfaces for smooth integration into CI/CD workflows.
Active community maintenance with regular dependency updates and security patches.
📥 Installation
$ git clone https://github.com/UCL/STIR.git
cd STIR⚙ System Requirements
Platforms
- • macOS
- • Linux
- • Windows
Runtime & Dependencies
C++20 compliant compiler (GCC 11+, Clang 13+, MSVC)
Architecture
x86_64, ARM64 (Apple Silicon & Graviton)
🧠 How It Works
STIR coordinates its core functionality through a modular C++ pipeline. It parses configuration parameters, validates inputs, and resolves dependencies asynchronously. By minimizing runtime overhead and keeping allocations localized, it delivers predictable performance in both local development environments and automated production workloads.
🎯 Production Use Cases
Production System Integration
Embed STIR into C++ backend services to handle core application logic.
CI/CD Automated Pipelines
Run automated validation, builds, and integration suites during deployments.
Developer Tooling & Workflows
Accelerate developer onboarding with pre-configured project utilities.
Open Source Extension
Fork and customize internal modules under the repository's open NOASSERTION license.
🚀 Getting Started
Install STIR using your package manager: `git clone https://github.com/UCL/STIR.git`
Initialize your project workspace or configuration file for STIR.
Import STIR into your codebase or invoke it directly from your terminal.
Execute your test suite or run `STIR --help` to verify successful setup.
👍 Strengths
⚠️ Considerations
⇄ Alternatives & Direct Competitors
👥 Who Should Use This
Developers and engineering teams building with C++, seeking reliable, tested, and actively maintained tooling for production workloads.
🏆 Nearby in the Rankings
UCL/STIR is currently ranked #17,579 by stars across every repository tracked on GitHubRepo. These are adjacent projects:
| Rank | Repository | Language | Stars | Action |
|---|---|---|---|---|
| #17,526 | DevMortimer/pi-warden | TypeScript | ★ 161 | Compare ↗ |
| #17,526 | CYBERVERSE-Research/skyline-speeder | Rust | ★ 161 | Compare ↗ |
| #17,526 | dorkitude/webctl | Go | ★ 161 | Compare ↗ |
| #17,526 | replicraft/remade | TypeScript | ★ 161 | Compare ↗ |
| #17,526 | qlabs-eng/noise | Python | ★ 161 | Compare ↗ |
| #17,579 | UCL/STIR This Project | C++ | ★ 160 | |
| #17,579 | pluginaweek/preferences | Ruby | ★ 160 | Compare ↗ |
| #17,579 | defunkt/markdown-mode | Emacs Lisp | ★ 160 | Compare ↗ |
| #17,579 | sethtrain/django-git | Python | ★ 160 | Compare ↗ |
| #17,579 | heuermh/lick | ChucK | ★ 160 | Compare ↗ |
| #17,579 | mame/_ | Ruby | ★ 160 | Compare ↗ |
Frequently Asked Questions
What does STIR do? +
Software for Tomographic Image Reconstruction
Is STIR actively maintained in 2026? +
Yes, STIR is actively maintained. The latest code push was recorded on Oct 1, 2026 (28 days ago). It holds a calculated Maintenance Health Score of 78/100 (B rating) with 160 stars and 347 open issues.
What language is STIR written in? +
The primary language is C++. Topics include: image-reconstruction, pet, spect.
How many stars does STIR have? +
STIR has 160 stars and 115 forks on GitHub.
How does STIR rank among GitHub repositories? +
With 160 stars, UCL/STIR is ranked #17,579 globally across all repositories tracked on GitHubRepo and #1,377 among C++ projects.
What license is STIR distributed under? +
The repository reports a NOASSERTION license. Always verify the repository LICENSE file for legal terms.
