Hi, Does anyone have any experience converting CMYK images to RGB/web using rmagick/mini_magick/imagemagick? I''m finding that the resulting RGB images look completely different, they seem to have a green tinge... fyi, I''m converting using -colorspace RGB, and I''m using imagemagick directly because the other 2 options seem really slow (by a factor of 20 or so). I have looked into color profiles, but after trying a few via command line I noticed that I can''t use the same profiles for all of the files. Is there any good documentation out there about color profiles? or is it a bit hit and miss. I''m a bit of a beginner at this image processing stuff so I might need a bit of explanation ;-) --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Ruby on Rails: Talk" group. To post to this group, send email to rubyonrails-talk-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org To unsubscribe from this group, send email to rubyonrails-talk-unsubscribe-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org For more options, visit this group at http://groups.google.com/group/rubyonrails-talk?hl=en -~----------~----~----~----~------~----~------~--~---
Jonathan Fantham wrote:> Hi, Does anyone have any experience converting CMYK images to RGB/web > using rmagick/mini_magick/imagemagick? > > I''m finding that the resulting RGB images look completely different, > they seem to have a green tinge... > > fyi, I''m converting using -colorspace RGB, and I''m using imagemagick > directly because the other 2 options seem really slow (by a factor of > 20 or so). > > I have looked into color profiles, but after trying a few via command > line I noticed that I can''t use the same profiles for all of the > files. Is there any good documentation out there about color profiles? > or is it a bit hit and miss. > > I''m a bit of a beginner at this image processing stuff so I might need > a bit of explanation ;-)I recommend asking on a rmagick / imagemagick mailing list. This stuff is not straightforward. Stephan -- Posted via http://www.ruby-forum.com/. --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Ruby on Rails: Talk" group. To post to this group, send email to rubyonrails-talk-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org To unsubscribe from this group, send email to rubyonrails-talk-unsubscribe-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org For more options, visit this group at http://groups.google.com/group/rubyonrails-talk?hl=en -~----------~----~----~----~------~----~------~--~---
Yeah you make a good point ;-) I was kinda just putting feelers out everywhere looking for anyone who had been through what I''m going through and could give me some pointers! Having said that, I have partially solved my problem! I wasn''t having any luck with profiles because I didn''t have a package installed called lcms or "Little cms". Imagemagick uses this to convert things via color profiles :-) fyi, if anyone is having trouble with this (on a mac) then you should install imagemagick via the following command: sudo port install imagemagick +lcms I haven''t tried it on ubuntu yet but it''s bound to be similar Thanks, Jonzo. On Fri, Apr 11, 2008 at 4:15 PM, Stephan Wehner <rails-mailing-list-ARtvInVfO7ksV2N9l4h3zg@public.gmane.org> wrote:> > Jonathan Fantham wrote: > > Hi, Does anyone have any experience converting CMYK images to RGB/web > > using rmagick/mini_magick/imagemagick? > > > > I''m finding that the resulting RGB images look completely different, > > they seem to have a green tinge... > > > > fyi, I''m converting using -colorspace RGB, and I''m using imagemagick > > directly because the other 2 options seem really slow (by a factor of > > 20 or so). > > > > I have looked into color profiles, but after trying a few via command > > line I noticed that I can''t use the same profiles for all of the > > files. Is there any good documentation out there about color profiles? > > or is it a bit hit and miss. > > > > I''m a bit of a beginner at this image processing stuff so I might need > > a bit of explanation ;-) > > I recommend asking on a rmagick / imagemagick mailing list. > > This stuff is not straightforward. > > Stephan > -- > Posted via http://www.ruby-forum.com/. > > > >-- Jonathan --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Ruby on Rails: Talk" group. To post to this group, send email to rubyonrails-talk-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org To unsubscribe from this group, send email to rubyonrails-talk-unsubscribe-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org For more options, visit this group at http://groups.google.com/group/rubyonrails-talk?hl=en -~----------~----~----~----~------~----~------~--~---