G'MIC - GREYC's Magic for Image Computing: A Full-Featured Open-Source Framework for Image Processing
Banner Institutions GREYC CNRS ENSICAEN UNICAEN

A Full-Featured Open-Source Framework for Image Processing



Latest stable version: 3.5.5        Current pre-release: 3.6.0 (2025/08/04)

Reference
Table of Contents  ▸  List of Commands  ▸  Filtering  ▸  blur_bloom◀  blur_angular    |    blur_linear  ▶

blur_bloom

Arguments:

  • _amplitude>=0,_ratio>=0,_nb_iter>=0,_blend_operator={ + | max | min },_kernel={ 0:Deriche | 1:Gaussian | 2:Box | 3:Triangle | 4:Quadratic },_normalize_scales={ 0:No | 1:Yes },_axes

Description:

Apply a bloom filter that blend multiple blur filters of different radii,

resulting in a larger but sharper glare than a simple blur.
When specified, argument axes is a sequence of { x | y | z | c }.
Specifying one axis multiple times apply also the blur multiple times.
Reference: Masaki Kawase, "Practical Implementation of High Dynamic Range Rendering", GDC 2004.

Default values:

amplitude=1, ratio=2, nb_iter=5, blend_operator=+, kernel=1, normalize_scales=0 and axes=(all)

Example of use:

image.jpg blur_bloom ,

Command: image.jpg blur_bloom ,
G'MIC - GREYC's Magic for Image Computing: A Full-Featured Open-Source Framework for Image Processing

G'MIC is an open-source software distributed under the CeCILL free software licenses (LGPL-like and/or
GPL-compatible). Copyrights (C) Since July 2008, David Tschumperlé - GREYC UMR CNRS 6072, Image Team.