---
name: "jpegjudge"
section: "1"
platform: "linux"
package: "jpegjudge"
version: "0.0.2-5"
release: "Debian 13 (Trixie)"
platforms: ["linux"]
url: "https://new.carta.tech/jpegjudge"
---

# jpegjudge(1)

guess jpeg picture quality

## NAME

*jpegjudge* - guess jpeg picture quality

## SYNOPSIS

**jpegjudge** \[ **-V** \]

**jpegjudge** \[ **-b** \] file ...

## DESCRIPTION

*Jpegjudge* reads each argument and attempts to guess the quality with which it was saved. Currently, only a rough indicator is calculcated, ranging from 0 (lowest quality) to 1000 (highest quality), an extension to other formats would be straightforward, but isn't planned.

It can read all pictures the **IJG jpeg library** can read, i.e. normal and progressive jpeg's.

### OPTIONS

- **-b**

  Display only quality indicator, suppress other information (filenames).

- **-h, --help**

  Display short summary of options.

- **-V, --version**

  Display version number and exit.

## BUGS

It should be possible to judge pictures stored in non-lossy formats, too, since conversion to jpeg may influence the measurement.

The quality indicator is non-linear, and could be much better.

The algorithm to calculate the quality was made up in 10 minutes, after staring at various histograms.

## ACKNOWLEDGEMENTS

This program contains code from the **IJG jpeg software.**