From: Axel Etzold <AEtzold@...>
Date: 2008-09-05T07:07:16+09:00
Subject: Re: finding blocks in black-and-white images (efficiently)


-------- Original-Nachricht --------
> Datum: Fri, 5 Sep 2008 06:23:54 +0900
> Von: Tim Hunter <TimHunter@nc.rr.com>
> An: ruby-talk@ruby-lang.org
> Betreff: Re: finding blocks in black-and-white images (efficiently)

> Axel Etzold wrote:
> > thank you very much for your help. This script does indeed look very
> interesting -- and very heroic !
> > It would be very nice to have it in RMagick,as far as I am concerned. I
> fear that my shell scripting
> > capabilities/knowledge of RMagick will not suffice to get it done in a
> very short time, so I'd some help to convert it into
> > Ruby. Also, more generally, how do you wrap ImageMagick functions in
> RMagick ? Do you call  C functions ?
> > At the install, I was lazy and took the gem option ;)
> 
> Okay, I'll see what I can do. I'll follow up with you directly. I'm 
> going out of town tomorrow so it may be a couple of days.
> 
> ImageMagick is essentially a library with a C-level API. (Actually there 
> are two APIs, MagickCore and MagickWand, but that's neither here nor 
> there.) The ImageMagick utilities (convert, mogrify, etc.) are 
> stand-alone programs that call into the library via the API. RMagick 
> uses the library, too.
> 
> Of course since RMagick is Ruby you get much more use out of the 
> ImageMagick library - access to individual pixels, for example - than 
> you can via the utilities, and Ruby makes it easier to use the API than 
> a shell scripting language does.
> 
> This page http://studio.imagemagick.org/RMagick/doc/optequiv.html 
> describes some of the RMagick API that corresponds to the ImageMagick 
> commands and options.
> 
> -- 
> RMagick: http://rmagick.rubyforge.org/


Tim, 

Thank you very much for the pointers !

Best regards,

Axel 

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