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I used the following code to process a webcam-picture (in.jpg), unsharp some area (defined in grayscale-file unsharpmask.png) and add a stamp.

  • load in.jpg
  • blur this file
  • load in.jpg as seperate layer
  • apply transparency mask
  • compose
  • add stamp
  • compose again and write to out.jpg

I used the following command to do this with ImageMagick:

convert in.jpg -blur 0x8 -compose over in.jpg unsharpmask.png -composite -compose over stamp.png -gravity SouthWest -composite -quality 90 out.jpg

But on GraphicsMagick it fails as the "-composite" option is missing,..

How can I do that with GraphicsMagick? Thanks in advance!

user1863017
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1 Answers1

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How complicated are your "private" areas and I assume they are always in the same place?

Can you use regions in graphicsmagick and try bluring those areas?

This is some code that will change a specified area to greyscale and I assume you could blur that area by replacing -colorspace Gray with -blur 15 or similar.

<?php  
$cmd = "$input -region 140x120+50+20 -colorspace Gray";  
exec("convert $cmd region_gray.jpg"); 
?>
Bonzo
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