Legacy ImageMagick Discussions Archive

Well I'm trying to make the image's edges soften so they don't look sharp (transparent background), and I can't seem to get it to work: So yea, I need some help here :/
And yes, I've been searching/tried things for 7 days, but nothing works :/ <.<

Check this link ( will need to scroll down the page a bit ): http://www.imagemagick.org/Usage/thumbnails/#fluff

Ok, I can't find anything <.<

http://www.imagemagick.org/Usage/thumbnails/#soft_edges

I thought you were trying to do something like:
or

If not post an example of what you want.

Cmars wrote:Well I'm trying to make the image's edges soften so they don't look sharp (transparent background), and I can't seem to get it to work:

Code: Select all

convert "C:\imgs\a.png" -antialias "C:\imgs\a.png"

So yea, I need some help here :/
And yes, I've been searching/tried things for 7 days, but nothing works :/ <.<

-antialias is a setting used with some operator such as -draw. by itself it does nothing.

I think you need to post a link to your example(s) and explain in more detail what is the issue or what you desire for the result.

Other example:

you need to take the mask and make it binary. then blur the mask a little with a linear ramp blur, then make the ramp taper to cut out the outside part of the blur.


Here are two ways to do that. You can adjust the -blur 1x65000 (change the 1 to 0.5 or 2 or whatever) as desired.

convert Sir_amik_varze_detail.PNG \
\( -clone 0 -alpha off \) \
\( -clone 0 -alpha extract -blur 1x65000 -level 50x100% \) \
-delete 0 -compose copy_opacity -composite Sir_amik_varze_detail1.png

convert Sir_amik_varze_detail.PNG -channel A -blur 1x65000 -level 50x100% \
-channel rgba Sir_amik_varze_detail1b.png

fmw42 wrote:you need to take the mask and make it binary. then blur the mask a little with a linear ramp blur, then make the ramp taper to cut out the outside part of the blur.


Here are two ways to do that. You can adjust the -blur 1x65000 (change the 1 to 0.5 or 2 or whatever) as desired.

convert Sir_amik_varze_detail.PNG \
\( -clone 0 -alpha off \) \
\( -clone 0 -alpha extract -blur 1x65000 -level 50x100% \) \
-delete 0 -compose copy_opacity -composite Sir_amik_varze_detail1.png

convert Sir_amik_varze_detail.PNG -channel A -blur 1x65000 -level 50x100% \
-channel rgba Sir_amik_varze_detail1b.png

Thank you.

if the edges pull in too much, beside making the 1 smaller, you can instead try to adjust the 50x100% (say make the 50 to 45 or 40).

Also see http://www.imagemagick.org/Usage/channels/#mask_diff

Thanks for all help

You could try using a feathering blur, of the alpha channel combined with the original channel to ensure fully-transparent pixels don't become partially transparent
http://www.imagemagick.org/Usage/blur/#feathering