Legacy ImageMagick Discussions Archive

We were upgraded from ImageMagick 6.5.x to 6.6.x when we upgraded our server to Ubuntu Server 11.10 Oneiric Ocelot (from 10.04 Lucid Lynx) and this ImageMagick "convert" command stopped working. It's part of the free and open source MapKnitter.org map rectifying service by PublicLaboratory.org.

Lines 191 and on of /app/models/warpable.rb (see source link below) typically generate something like:
Which is now throwing:
I know it's a complex command; the simple version:
actually works without errors. So something in the longer command is causing trouble. Apologies in advance for a kind of ridiculously long list of modifiers.

Adding -colorspace RGB in various locations doesn't seem to help, as has been suggested in some forums I've perused.

http://www.imagemagick.org/script/comma ... colorspace

Crappy. Not making much progress. Please help!

Context here: https://github.com/jywarren/mapknitter/issues/76

I had the same error as you running your code. There are some strange things I can see in your code:
1/ Image should be read in first after convert.
2/ You do not need all the "-background transparent".

So the map rectifying service generates the convert line?

Anyway even after modifying your code I still had a different error and hopefuly somebody else can help you out.

The order of control points was changed to a different order at one point in -distort perspective. see http://www.imagemagick.org/Usage/distor ... rol_points. But I believe that this was after version 6.3.6. So I am not sure if that is your problem or not. Though it does appear to me that you might be using the older format, however I cannot tell for sure.