Selective floodfill

[unhappycamper]

I have many square-shaped images that are black and white, but have a rounded white border on each corner. I want to fill in those borders with black. So I'm wondering if there is a way to selectively floodfill only those four areas. Any insight would be appreciated.

[GreenKoopa]

-floodfill? Posting the image would help me see what you are describing.

[unhappycamper]

Thanks for your reply. I just figured out how to do it, with a composite command (with bumpmap).

[anthony]

An example would have helped...

Try -fuzz 1% -fill black -floodfill +0+0 white
and repeat the flood fill on each corner pixel.

This floodfill will only floodfill white corners and will ignore non-white corners.

[unhappycamper]

Yes, sorry, I just joined and wasn't sure how to post an image to the forum.

Here is what worked for me (before your suggestion):
composite 44.jpg inverted.jpg -compose bumpmap -gravity center 44_inverted.jpg

(inverted.jpg being the basic black and white image, inverting black and white, so that the corners were now black)

That command left some lines, so I just edited the inverted file to make sure the black bled into the image some more. And then ran it again, and it worked perfectly.

Thanks again for your suggestion.

[fmw42]

You need to find some free image hosting service, upload your image there. Then put a link here to that image. This forum does not allow direct upload of images.