CompareImageCommand

CompareImageCommand() compares two images and returns the difference between them as a distortion metric and as a new image visually annotating their differences.

The format of the CompareImageCommand method is:

MagickBooleanType CompareImageCommand(ImageInfo *image_info,int argc,
  char **argv,char **metadata,ExceptionInfo *exception)

A description of each parameter follows:

image_info

the image info.

argc

the number of elements in the argument vector.

argv

A text array containing the command line arguments.

metadata

any metadata is returned here.

exception

return any errors or warnings in this structure.