Legacy ImageMagick Discussions Archive

Hi

I am using imagick together with php

I perform the following blur:

        $img = new Imagick$filename);
        $img->gaussianblurimage(30, 30);
        file_put_contents ("30".$filename , $img);
        $img->gaussianblurimage(50, 30);
        file_put_contents ("50".$filename, $img);
        $img->gaussianblurimage(80, 30);
        file_put_contents ("80".$filename, $img);

This takes several minutes to perform and CPU rises to 75%.

I run it on windows
version:

C:\Users\Lukas>convert -version
Version: ImageMagick 6.7.7-4 2012-05-29 Q16 http://www.imagemagick.org
Copyright: Copyright (C) 1999-2012 ImageMagick Studio LLC
Features: OpenMP

"-blur" is much faster than "-gaussian-blur" and gives almost identical results, for most purposes.

The numbers 30,50 etc -- are they radius and sigma? For large radii, resizing the image down then up can give good results, and is very much faster.

Thanks for the reply
yes, the first number is the radius, the second the sigma.

just curious. Does it take for you minutes as well to blur a 1920x1200 image?

or at least several seconds?

For large blurs (0xlargesigma), you can resize the image down, blur with a proportionally smaller sigma, then resize it back up. It will be much faster. See my examples at http://www.fmwconcepts.com/imagemagick/ ... fast_gblur

I do not suggest you use both radius and sigma. Typically IM will figure out the right radius, if it is set to 0, given the sigma, i.e. 0xsigma

At the command line, for a 1920x1200 image, "-gaussian-blur 50x30" takes about 18 seconds. "-blur 50x30" takes about zero seconds.

IM v6.9.0-0 on Windows 8.1

thanks for the replies, that helped a lot!

Legacy ImageMagick Discussions Archive

Blurring 2.5 MB png files taking minutes, very slow on windows 8.1 with version 6.7.7

Blurring 2.5 MB png files taking minutes, very slow on windows 8.1 with version 6.7.7

Re: Blurring 2.5 MB png files taking minutes, very slow on windows 8.1 with version 6.7.7

Re: Blurring 2.5 MB png files taking minutes, very slow on windows 8.1 with version 6.7.7

Re: Blurring 2.5 MB png files taking minutes, very slow on windows 8.1 with version 6.7.7

Re: Blurring 2.5 MB png files taking minutes, very slow on windows 8.1 with version 6.7.7

Re: Blurring 2.5 MB png files taking minutes, very slow on windows 8.1 with version 6.7.7