---
name: "ssimulacra2"
section: "1"
platform: "linux"
package: "libjxl-devtools"
version: "0.11.2-0.1~deb13u2"
release: "Debian 13 (Trixie)"
platforms: ["linux"]
url: "https://new.carta.tech/ssimulacra2"
---

# ssimulacra2(1)

ssimulacra2

## NAME

ssimulacra2 - ssimulacra2

## SYNOPSIS

**ssimulacra2** *orig.png distorted.png*

## DESCRIPTION

### Returns a score in range -inf..100, which correlates to subjective visual quality:

-

  30 = low quality (p10 worst output of mozjpeg **-quality** 30) 50 = medium quality (average output of cjxl **-q** 40 or mozjpeg **-quality** 40,

-

  p10 output of cjxl **-q** 50 or mozjpeg **-quality** 60)

- 70 = high quality (average output of cjxl **-q** 70 or mozjpeg **-quality** 70,

  p10 output of cjxl **-q** 75 or mozjpeg **-quality** 80)

- 90 = very high quality (impossible to distinguish from original at 1:1,

  average output of cjxl **-q** 90 or mozjpeg **-quality** 90)

## AUTHOR

This manual page was written by Mathieu Malaterre \<malat@debian.org\> for the Debian GNU/Linux system (but may be used by others).