Questions and postings pertaining to the usage of ImageMagick regardless of the interface. This includes the command-line utilities, as well as the C and C++ APIs. Usage questions are like "How do I use ImageMagick to create drop shadows?".
In general, IM does not do well processing in CMYK. I do not recommend processing in CMYK. You should convert to sRGB, process and then convert back to CMYK.