Search found 8 matches

by nitrofurano
2013-10-18T07:12:28-07:00
Forum: Users
Topic: how can we install 6.8.7 on Debian and Ubuntu?
Replies: 2
Views: 39012

how can we install 6.8.7 on Debian and Ubuntu?

hi! i'm about to install Imagemagick 6.8.7 , but 6.7.7 is the last version available from both Ubuntu (13.10) and Debian (Jessie, testing) repositories. Since it seems that i really need 6.8.7 (seems to have the LAB and YUV accuracy that i actually need), how can we install 6.8.7 there? Is there any...
by nitrofurano
2013-10-18T06:43:33-07:00
Forum: Users
Topic: how we combine LAB or HSB channels from different pictures?
Replies: 9
Views: 4801

Re: how we combine LAB or HSB channels from different pictur

v6.7.7 is old. I suggest you upgrade. I am not sure LAB was clean in that old a version. From the changelog: 2012-07-02 6.7.8-2 Cristy <quetzlzacatenango@image...> Change LAB encoding to permit blurring, resize, etc. (signed A and B channel values now stored using a 50% bias) Additional.. This remo...
by nitrofurano
2013-10-18T06:41:35-07:00
Forum: Users
Topic: how we combine LAB or HSB channels from different pictures?
Replies: 9
Views: 4801

Re: how we combine LAB or HSB channels from different pictur

convert pic1_L.png pic1_A.png pic1_B.png -combine -set colorspace LAB -colorspace sRGB combined.png I believe this should be -set colorspace LAB before -combine and -colorspace sRGB after the -combine. See http://www.imagemagick.org/Usage/color_basics/#combine_other convert pic1_L.png pic1_A.png pi...
by nitrofurano
2013-10-17T14:48:05-07:00
Forum: Users
Topic: how we combine LAB or HSB channels from different pictures?
Replies: 9
Views: 4801

Re: how we combine LAB or HSB channels from different pictur

Testing my method on a single sample image, I get no visual difference. What version of IM are you using, on what platform? I'm using v6.8.7-0 on Windows 7. Synaptic says 8:6.7.7.10-5ubuntu3 - it's on Lubuntu 13.10 (i also have Crunchbang-Jessie installed on another partition, i didn't tried there,...
by nitrofurano
2013-10-17T11:04:01-07:00
Forum: Users
Topic: how we combine LAB or HSB channels from different pictures?
Replies: 9
Views: 4801

Re: how we combine LAB or HSB channels from different pictur

This is wrong: convert pic1_L.png pic2_A.png pic2_B.png -set colorspace LAB -colorspace RGB -combine combined.png It should be: convert pic1_L.png pic2_A.png pic2_B.png -combine -set colorspace LAB -colorspace sRGB combined.png You need to combine before changing colorspace, and change it to sRGB n...
by nitrofurano
2013-10-17T09:58:12-07:00
Forum: Users
Topic: how we combine LAB or HSB channels from different pictures?
Replies: 9
Views: 4801

how we combine LAB or HSB channels from different pictures?

hi! i'm struggling on combining, for example, L channel from picture1 and AB from picture2, in a picture 3 - how can we do it? the idea is copying the luminance from one picture, and the chrominance from other, both in the same pixel size i tried this, but the result is really weird convert pic1.png...
by nitrofurano
2013-02-20T13:17:46-07:00
Forum: Users
Topic: how can i convert pictures to Amiga HAM?
Replies: 1
Views: 4432

how can i convert pictures to Amiga HAM?

do someone know how can we convert pictures to Amiga HAM-6, EHB, HAM-8 (iff ilbm), and NEC-PC88 .mag format? thanks! :)
by nitrofurano
2011-02-13T07:58:14-07:00
Forum: Users
Topic: chroma key from two pictures: help needed
Replies: 2
Views: 6415

chroma key from two pictures: help needed

Do someone know how can we do chroma key on imagemagick? This would be like generate a third picture, from two source pictures (one as background, and another for the above 'layer' using blue or green as transparent colour ) http://en.wikipedia.org/wiki/Chroma_key explains a bit better what it is, f...