Fx

FxImage

FxImage() applies a mathematical expression to the specified image.

The format of the FxImage method is:

Image *FxImage(const Image *image,const char *expression,
  ExceptionInfo *exception)
Image *FxImageChannel(const Image *image,const ChannelType channel,
  const char *expression,ExceptionInfo *exception)

A description of each parameter follows:

image: the image.
channel: the channel.
expression: A mathematical expression.
exception: return any errors or warnings in this structure.