Legacy ImageMagick Discussions Archive

Hello

I was looking for a way to convert my silhouette images into a stencil outline. Is there a way to do this correctly?

I have tried taking my silhouette image and applied the following 2 commands:

• convert image.png -edge .5 -blur 0x.5 image_new.png
  convert image_new.png -negate image_final.png

And I get a pretty decent image created with the black silhouette fill removed and just a black outline border.

It does leave a bit of noise though around the border edges and the images are not super clean.

I was just wondering if there is a better way to do this. I'm probably doing it all wrong

Thank you

How about resizing the original, negating, change the black to transparent it then compositing it with gravity center back over the original?

How about posting a link to your input image so we can see what you are trying to do.

My method did not work very well:

Hi! Thank you for sharing your thoughts.

The original image:
http://img43.imageshack.us/img43/5357/qlq.png

After i apply the command:
convert image.png -edge .5 -blur 0x.5 image_new.png

I get this image:
http://img443.imageshack.us/img443/1766/enit.png

and after i apply the second command:
convert image_new.png -negate image_final.png

I end up getting the desired outline on the image:
http://img850.imageshack.us/img850/7831/xwqj.png

But as you can see it's a little dirty around the edges.

I was hoping to get an output something similar to this:
http://www.clker.com/cliparts/z/l/W/s/U ... ine-md.png

Thanks very much!

Thanks Bonzo.

I tried what you suggested but as you mentioned, it didn't come out very well Cheers

your image does not have a pure white outside (though it is not visible to eye). But if you threshold at 99% you will see it is "dirty". Also the boundary is antialiased.

try this

convert qlq.png -alpha off -gravity center -bordercolor white -border 5 -morphology edgeout diamond:1 -shave 5x5 -negate outline1.png

or

convert qlq.png -alpha off -gravity center -bordercolor white -border 5 -morphology edgein diamond:1 -shave 5x5 -negate outline2.png


see http://www.imagemagick.org/Usage/morphology/#difference



Or if you want binary, then

convert qlq.png -alpha off -gravity center -bordercolor white -border 5 -morphology edgeout diamond:1 -shave 5x5 -threshold 15% -negate outline3.png

Sorry for the super late reply.

Thanks very much! The last one worked pretty well.

I appreciate the help
Thank you