Re: color border in image, drop everything outside of it

From	mick crane <mick.crane@gmail.com>
Newsgroups	linux.debian.user
Subject	Re: color border in image, drop everything outside of it
Date	2020-11-15 11:40 +0100
Message-ID	<BbnBU-5tj-7@gated-at.bofh.it> (permalink)
References	<Bbdjb-7Ih-7@gated-at.bofh.it> <BbmFP-4Uy-9@gated-at.bofh.it>
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On 2020-11-15 09:38, tomas@tuxteam.de wrote:
> On Sun, Nov 15, 2020 at 12:31:22AM +0100, Emanuel Berg wrote:
>> Hello, is there a tool/command/script anywhere that can overwrite
>> with a single color (or make transparent) every pixel to the left,
>> above, right, and below a certain other color?
>> 
>> e.g., if one draws a loop of black, tell the program black is the
>> border, the result would be only what is within the loop?
> 
> Your request is a bit... unspecific.
> 
> Are you (a) after a tool which you use interactively, where you
> actually see the image you described above, and where you can
> click into that loop to start the operation?
> 
> Or is it (b) rather some kind or "batch mode", where you give the
> program the image file *plus* the coordinates of that point inside
> the loop where to start?
> 
> For ease of search, the operation you're describing is usually
> called "flood fill". If you are after (a), your friend is The Gimp;
> I guess Krita will fill that bill as well. If it's (b), the usual
> standard is "mogrify", from the ImageMagick suite. Look at [1] for
> the details on flood fill.
> 
> Getting warm with the ImageMagick programs takes a bit of practice,
> but it's worth it. Come back if you get stuck.
> 
> Cheers
> [1] https://imagemagick.org/script/command-line-options.php#floodfill
>  - t

I needs to be scripted tho' if want the (x-1, x+1, y-1, y+1)s to be 
wants to be a particular value ?
mick


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Thread

color border in image, drop everything outside of it Emanuel Berg <moasenwood@zoho.eu> - 2020-11-15 00:40 +0100
  Re: color border in image, drop everything outside of it Michael uplawski <linux-gate@don.blech.e4ward.com> - 2020-11-15 10:00 +0100
    Re: color border in image, drop everything outside of it Emanuel Berg <moasenwood@zoho.eu> - 2020-11-15 10:10 +0100
      Re: color border in image, drop everything outside of it Michael uplawski <linux-gate@don.blech.e4ward.com> - 2020-11-15 11:10 +0100
        Re: color border in image, drop everything outside of it <tomas@tuxteam.de> - 2020-11-15 11:30 +0100
        Re: color border in image, drop everything outside of it Emanuel Berg <moasenwood@zoho.eu> - 2020-11-22 03:30 +0100
  Re: color border in image, drop everything outside of it <tomas@tuxteam.de> - 2020-11-15 10:40 +0100
    Re: color border in image, drop everything outside of it The Wanderer <wanderer@fastmail.fm> - 2020-11-15 11:30 +0100
      Re: color border in image, drop everything outside of it Jeremy Ardley <jeremy@ardley.org> - 2020-11-15 12:00 +0100
      Re: color border in image, drop everything outside of it <tomas@tuxteam.de> - 2020-11-15 12:10 +0100
        Re: color border in image, drop everything outside of it The Wanderer <wanderer@fastmail.fm> - 2020-11-15 12:50 +0100
          Re: color border in image, drop everything outside of it <tomas@tuxteam.de> - 2020-11-15 13:30 +0100
      Re: color border in image, drop everything outside of it Michael uplawski <linux-gate@don.blech.e4ward.com> - 2020-11-15 12:10 +0100
        Re: color border in image, drop everything outside of it Michael uplawski <linux-gate@don.blech.e4ward.com> - 2020-11-15 12:50 +0100
      Re: color border in image, drop everything outside of it Emanuel Berg <moasenwood@zoho.eu> - 2020-11-22 03:20 +0100
    Re: color border in image, drop everything outside of it mick crane <mick.crane@gmail.com> - 2020-11-15 11:40 +0100
    Re: color border in image, drop everything outside of it Emanuel Berg <moasenwood@zoho.eu> - 2020-11-22 03:20 +0100
      Re: color border in image, drop everything outside of it David Wright <deblis@lionunicorn.co.uk> - 2020-11-22 04:40 +0100
        Re: color border in image, drop everything outside of it Emanuel Berg <moasenwood@zoho.eu> - 2020-11-22 05:20 +0100
          Re: color border in image, drop everything outside of it David Wright <deblis@lionunicorn.co.uk> - 2020-11-23 06:20 +0100
            Re: color border in image, drop everything outside of it Emanuel Berg <moasenwood@zoho.eu> - 2020-11-23 06:30 +0100
              Re: color border in image, drop everything outside of it David Wright <deblis@lionunicorn.co.uk> - 2020-11-24 20:50 +0100
                Re: color border in image, drop everything outside of it Emanuel Berg <moasenwood@zoho.eu> - 2020-11-24 22:40 +0100
                Re: color border in image, drop everything outside of it <tomas@tuxteam.de> - 2020-11-24 22:50 +0100
                Re: color border in image, drop everything outside of it Emanuel Berg <moasenwood@zoho.eu> - 2020-11-26 01:30 +0100
                Re: color border in image, drop everything outside of it <tomas@tuxteam.de> - 2020-11-26 09:50 +0100
                Re: color border in image, drop everything outside of it Emanuel Berg <moasenwood@zoho.eu> - 2020-11-26 12:30 +0100
                Re: color border in image, drop everything outside of it <tomas@tuxteam.de> - 2020-11-26 12:40 +0100
                Re: color border in image, drop everything outside of it Emanuel Berg <moasenwood@zoho.eu> - 2020-11-26 12:50 +0100
                Re: color border in image, drop everything outside of it <tomas@tuxteam.de> - 2020-11-26 14:10 +0100
      Re: color border in image, drop everything outside of it <tomas@tuxteam.de> - 2020-11-22 10:10 +0100
        Re: color border in image, drop everything outside of it Emanuel Berg <moasenwood@zoho.eu> - 2020-11-22 10:30 +0100

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