---
name: "exrblur"
section: "1"
platform: "linux"
package: "exrtools"
version: "0.4-1.2+b2"
release: "Debian 8 (Jessie)"
platforms: ["linux"]
url: "https://new.carta.tech/exrblur"
---

# exrblur(1)

perform a gaussian blur on an OpenEXR image

## NAME

exrblur - perform a gaussian blur on an OpenEXR image

## SYNOPSIS

**exrblur** input.exr output.exr kernelsize

## DESCRIPTION

Performs a gaussian blur on the input image.  This is useful for generating a whitepoint image for chromatic adaptation of locally adapting tone mapping algorithms.

The kernel size for the blur is given as a fraction of the image width. So, a kernelsize of 0.25 will perform a blur with a kernel width 1/4 of the image width.

## AUTHORS

Billy Biggs \<vektor@dumbterm.net\>.

## SEE ALSO

[**exrtools**(1)](/exrtools/1.md).