---
name: "optimize2bw"
section: "1"
platform: "linux"
package: "exactimage"
version: "1.2.1-2"
release: "Debian 13 (Trixie)"
platforms: ["linux"]
url: "https://new.carta.tech/optimize2bw"
---

# optimize2bw(1)

automatic thresholder of the ExactImage toolkit

## NAME

optimize2bw - automatic thresholder of the ExactImage toolkit

## SYNOPSIS

**optimize2bw** \[*option*...\] {**-i** \| **--input**} *input-file*  {**-o** \| **--output**} *output-file*

**optimize2bw** **--help**

## DESCRIPTION

ExactImage is a fast C++ image processing library. Unlike many other library frameworks it allows operation in several color spaces and bit depths natively, resulting in low memory and computational requirements.

**optimize2bw** reads image files and performs automatic thresholding and optional scaling on the data. It is useful for long term archiving of documents that have to be stored in sub-byte black and white data to reduce storage requirements.

## OPTIONS

- **-i** *file*, **--input** *file*

  Read image from the specified file.

- **-o** *file*, **--output** *file*

  Save output image to the specified file.

- **-n**, **--denoise**

  Remove (“denoise”) single bit pixel noise.

- **-d** *n*, **--dpi** *n*

  Scale the image to the specified resolution.

- **-h** *n*, **--high** *n*

  Set high normalization value.

- **-l** *n*, **--low** *n*

  Set low normalization value.

- **-r** *n*, **--radius** *n*

  Set “unsharp mask” radius. The default is 0.

- **-s** *n*, **--scale** *n*

  Set output scale factor. The default is 1.0.

- **-sd** *x*, **--standard-deviation** *x*

  Set standard deviation for Gaussian distribution. The default is 0.0.

- **-t** *n*, **--threshold** *n*

  Set threshold value. The default is 0.

- **--help**

  Display help text and exit.

## EXAMPLES

```
$ optimize2bw -i logo.jpg -o logo.tif
Scale: 0
```

## SEE ALSO

[**exactimage**(7)](/exactimage/7.md)

## AUTHORS

**Jakub Wilk** \<jwilk@debian.org\>

Wrote this manual page for the Debian system.

**https://exactcode.com/opensource/exactimage/**

This manual page incorporates texts found on the ExactImage homepage.

## COPYRIGHT

This manual page was written for the Debian system (and may be used by others).

Permission is granted to copy, distribute and/or modify this document under the terms of the GNU General Public License, Version 2 or (at your option) any later version published by the Free Software Foundation.

On Debian systems, the complete text of the GNU General Public License can be found in /usr/share/common-licenses/GPL-2.