Legacy ImageMagick Discussions Archive

Ouch! Thanks, Fred. I've been caught out by this before...

A note to the developers: please make "-separate" and "-combine" consistent in how their colorspaces are set.

When I run this simple command to test that a "no-operation" channel separation and re-combination works as expected: convert logo: -colorspace rgb -separate -colorspace rgb -combine -colorspace rgb miff:- | display miff:- - all is well, the output looks the same as the input. But if I change the ...

Thanks, Fred, that works. Playing around with the settings, "-selective-blur 4x4+10%" produces good results for colour noise reduction. Cheers!

No-one? Fred? Anyone? Does -selective-blur work for you?

Using IM 6.6.3.6 on Ubuntu 10.04, no matter what geometry setting I use with "-selective-blur", the command has no effect. The strange thing is that with a higher setting, the processing takes longer, but no effect in the end. Is this a bug or am I doing it wrong? I use it as "-selective-blur 6x16 ...

Haven't we been here before? Isn't the answer to use "-channel rgb", and "-contrast-stretch" with a very small percentage value? On my 15Mp files, I use 0x0.00001%. I've done a lot of tests and can't see any clipping beyond maybe a handful of pixels, difficult to notice. It's also worth adding that ...

Oh, I get it, thanks, Fred! Basically you're saying you have to convert to sRGB and then it will display correctly. Ironically, I've now switched to an all-sRGB workflow so this is no longer needed, but it's good to know for future reference.

I notice that the TIFFs I process with IM, which have the AdobeRGB ICC profile embedded, are displayed by the "display" command as if they were sRGB or had no profile. (In my experience, files with no profile or using sRGB look identical on a computer monitor, understandably.) But when I bring the ...

Thanks for the comprehensive replies, Fred. A few clarifications: The CA I'm concerned with is the one caused by the lens, where it's 0 at centre of image and severe at edges. I have seen different and sometimes contradictory terms used to describe it - lateral, linear, transversal - so I'm not sure ...

I would like to use ImageMagick to correct chromatic aberration, the kind that is caused by the lens, going from 0 at the centre of image to its max at the edges. I think it should be doable, but don't know where to start. I'm surprised that my searches on the internet have revealed no IM methods in ...

As root, type ldconfig /usr/local/lib. I'm a little nervous now... Could you tell me what this will do and when to run it. I've uninstalled 6.6.3, and again have a functioning 6.6.2. I've looked in /usr/local/lib and it contains the ImageMagick-6.6.3 folder with subfolders: ImageMagick-6.6.3 ...

I've just run 'make uninstall' and it seems I'm back to a functioning IM 6.6.2-6. Thank God for that!

I had a functioning IM 6.6.2-6 running on my Ubuntu 10.04 that I had compiled from source and wanted to upgrade to 6.6.3-1 in the same way. I followed the instructions, downloading the archive and running: $ tar xvfz ImageMagick.tar.gz $ cd ImageMagick-6.6.3-1 $ ./configure $ make $ sudo make ...

I truly wish I could contribute code, alas, I'm not capable of learning a language such as C or C++. Every time I tried I fell into a coma! I dream of an application, a high level language, that could be used to easily create code, and then the application would translate it into a lower level ...

Beautiful! Just the kind of automagic I like... thank you!

Hang on though, does that mean Colorize/Luminize now won't be improved?