# SSIMULACRA 2

> perceptual image quality metric

**Wikidata**: [Q117789760](https://www.wikidata.org/wiki/Q117789760)  
**Source**: https://4ort.xyz/entity/ssimulacra-2

Here’s the structured knowledge entry for **SSIMULACRA 2** based on the provided source material:

---

## Summary  
SSIMULACRA 2 is a perceptual image quality metric designed to evaluate the visual fidelity of images. It is an improved version of SSIMULACRA, developed by Jon Sneyers and released under a 3-clause BSD License. The tool is used to objectively measure image quality, particularly in contexts like compression and optimization.

## Key Facts  
- **Type**: Perceptual image quality metric and software.  
- **Developer**: Jon Sneyers (Belgian software developer, born 1981).  
- **Latest Version**: 2.1 (released April 20, 2023).  
- **License**: 3-clause BSD License ([source](https://github.com/cloudinary/ssimulacra2/blob/main/LICENSE)).  
- **Preceded By**: SSIMULACRA ([source](https://github.com/cloudinary/ssimulacra2)).  
- **Initial Release**: Version 2.0 published January 19, 2023 ([source](https://github.com/cloudinary/ssimulacra2/releases/tag/v2.0)).  
- **Source Code**: Available on [GitHub](https://github.com/cloudinary/ssimulacra2).  
- **Based On**: SSIMULACRA, an earlier perceptual quality metric.  

## FAQs  
### Q: What is SSIMULACRA 2 used for?  
A: SSIMULACRA 2 is used to objectively measure the perceptual quality of images, particularly in applications like image compression and optimization, where visual fidelity is critical.  

### Q: Who developed SSIMULACRA 2?  
A: It was developed by Jon Sneyers, a Belgian software developer and computer scientist known for his work on image processing tools.  

### Q: How does SSIMULACRA 2 differ from SSIMULACRA?  
A: SSIMULACRA 2 is an improved iteration of SSIMULACRA, with updated algorithms and refinements for more accurate perceptual quality assessment.  

## Why It Matters  
SSIMULACRA 2 addresses the need for reliable, objective metrics to evaluate image quality, especially in fields like digital media, web optimization, and compression. Traditional metrics like PSNR or SSIM often fail to align with human perception, whereas SSIMULACRA 2 aims to bridge this gap. Its open-source nature and BSD license make it accessible for both research and commercial use, fostering innovation in image processing. By providing a more accurate assessment of visual fidelity, it helps developers and researchers optimize images without sacrificing quality.  

## Notable For  
- **Improved Accuracy**: Refines the original SSIMULACRA metric for better perceptual alignment.  
- **Open-Source**: Freely available under a permissive 3-clause BSD License.  
- **Developer Credibility**: Created by Jon Sneyers, an established figure in image processing.  
- **Active Development**: Regular updates, with versions 2.0 and 2.1 released in 2023.  

## Body  
### Development  
- Developed by **Jon Sneyers**, released under Cloudinary's GitHub repository.  
- Initial commit published on **July 27, 2022** ([source](https://github.com/cloudinary/ssimulacra2/commit/b4606e644db4f6b8c9a26799843fc50c06b25f66)).  

### Versions  
- **Version 2.0**: Released January 19, 2023 ([GitHub](https://github.com/cloudinary/ssimulacra2/releases/tag/v2.0)).  
- **Version 2.1**: Released April 20, 2023, marked as the preferred version ([GitHub](https://github.com/cloudinary/ssimulacra2/releases/tag/v2.1)).  

### Technical Details  
- **License**: 3-clause BSD License.  
- **Repository**: Hosted on GitHub ([link](https://github.com/cloudinary/ssimulacra2)).  
- **Based On**: Extends the original SSIMULACRA metric.  

## Schema Markup  
```json
{
  "@context": "https://schema.org",
  "@type": "Thing",
  "name": "SSIMULACRA 2",
  "description": "A perceptual image quality metric developed by Jon Sneyers.",
  "url": "https://github.com/cloudinary/ssimulacra2",
  "additionalType": "Software"
}

## References

1. [Source](https://github.com/cloudinary/ssimulacra2)
2. [Source](https://github.com/cloudinary/ssimulacra2/blob/main/LICENSE)
3. [Release 2.0. 2023](https://github.com/cloudinary/ssimulacra2/releases/tag/v2.0)
4. [Release 2.1. 2023](https://github.com/cloudinary/ssimulacra2/releases/tag/v2.1)
5. [Source](https://github.com/cloudinary/ssimulacra2/commit/b4606e644db4f6b8c9a26799843fc50c06b25f66)