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What convert command do I use to blur part of an image. For now I am using
convert source.jpg -fill white -draw "polyline 671,395 665,356 812,331 818,370" result.jpg
It creates white four points shape on the image, but I need blur all of this part of the image.
Thanks!
632
Go to Edit Image in the top toolbar and locate the Blur option under Tools or search for it in the search bar. Use the Auto option to blur your entire image, or select Blur to brush the area you want to blur out. You can also erase the blur by using the Restore brush option.
So, here's how to create a background blur using the backdrop-filter CSS property. backdrop-filter: blur(5px); That's it.
If you want to blur the entire image choose Filter > Blur > Gaussian Blur... Adjust the radius to add more or less blur to the image. Then click "OK".
In ImageMagick, you can use any mask to limit the blur.
Create a black and white mask image: black inside your quadrilateral and white elsewhere of the size of your image. Then use that as a mask for doing blurring. See http://www.imagemagick.org/Usage/masking/#read_mask.
Input:
(Unix syntax)
convert \
logo.jpg \
\( -clone 0 -fill white -colorize 100 -fill black \
-draw "polygon 332,180 427,105 481,238 399,279" \
-alpha off -write mpr:mask +delete \) \
-mask mpr:mask -blur 0x5 +mask logo_blur.jpg
Blurred Result
131
Use -region http://www.imagemagick.org/Usage/masking/#region_warping
convert a.png -region 150x150+599+261 -implode 1.5 +region b.png
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