Image processing in ruby

ruby-talk
1

Hello

I was wondering if I could do image processing in Ruby or would have
to resort to something else for that.

Looking at available bindings I find

- ImageScience - thumbnailer only, useless
- RMagick - no useful functions
- Ruby-Processing - only drawing and very basic math
- ruby-dcl
- Camellia - a few basic functions

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2

I was wondering if I could do image processing in Ruby or would have
to resort to something else for that.

Looking at available bindings I find

- ImageScience - thumbnailer only, useless
- RMagick - no useful functions
- Ruby-Processing - only drawing and very basic math
- ruby-dcl
- Camellia - a few basic functions

RMagick has no useful functions? I beg to differ. What kind of image
processing do you need? RMagick has always done the job for me.

-Jonathan Nielsen

3

Sorry, ignore the previous message.

Looking at available bindings I find

- ImageScience - thumbnailer only, useless
- RMagick - no useful functions
- DevIL - besides supporting some odd image formats just another ImageMagick
- Ruby-Processing - only drawing, 3D and very basic math (and IDE/GUI
which might be useful) (documentation mentions JRuby)
- ruby-dcl - documented mostly in Japanese, the English documentation
suggests only drawing, UI, and basic math although the docs claim use
in oceanography and atmosphere research
- VTK-Ruby - only drawing, 3D, UI, and some basic math
- HornetsEye - seems to have a few basic functions but does not come
with pre-built docs and I cannot build it
- Camellia - a few basic functions
- Ruby/OpenCV - a companion to Camelia (uses same data format) -
quite a few useful funcions
           - edge detection (multiple methods)
           - FFT
           - other dissection methods that might be useful

- ITK - companion to VTK, is supposed to be geared towards image
processing but only Java bindings are available
- includes edge detection, FFT, MI
- perhaps could be imported into JRuby - found nice articles on that
    http://www.itk.org/Wiki/VTK/Using_JRuby
    http://depth-first.com/articles/2006/10/24/metaprogramming-with-ruby-mapping-java-packages-onto-ruby-modules

Overall ITK seems about on par or perhaps more complete than OpenCV
which are the best tools I could find.

ITK seems best suited so far because it is fairly complete according
to the docs and ability to use JRuby means I could add stuff that runs
at decent speeds in the Sun JVM without resorting to something like C.

If somebody can suggest a better library I have overlooked I would like to know.

Thanks

Michal

http://seattlerb.rubyforge.org/ImageScience.html
http://rmagick.rubyforge.org/
http://openil.sourceforge.net/


http://ruby.gfd-dennou.org/products/ruby-dcl/
http://www.gfd-dennou.org/arch/ruby/products/ruby-vtk/
http://camellia.sourceforge.net/index.html
http://rubyforge.org/projects/opencv/
http://www.itk.org/

4

Image processing component library developed by using web asp.net and
java script controls can be used to achieve some basic image editing
operations, such as image rotating, filpping, scaling and image antique
effect and sharpening addings.

http://www.rasteredge.com/how-to/asp-net-imaging/imaging-processing/

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5

I was wondering if I could do image processing in Ruby or would have
to resort to something else for that.

Looking at available bindings I find

- ImageScience - thumbnailer only, useless
- RMagick - no useful functions
- Ruby-Processing - only drawing and very basic math
- ruby-dcl
- Camellia - a few basic functions

RMagick has no useful functions? I beg to differ. What kind of image
processing do you need? RMagick has always done the job for me.

OK, after looking at Camellia, I think I see what you want... you want
to be able to 'detect' things in images? I guess I had my definitions
for image processing mixed up if that's the case... I've never had to
do that so I don't have any useful advice, sorry...

-Jonathan Nielsen