ImageMagick – MagickCore, C API: Compare an Image to a Reconstructed Image
Author: ImageMagick Studio LLC
Description: ImageMagick is a powerful, open-source software suite for creating, editing, converting, and manipulating images in over 200 formats. Ideal for web developers, graphic designers, and researchers, it offers versatile tools for image processing, including batch processing, format conversion, and complex image transformations.
Keywords: MagickCore, C API: Compare an Image to a Reconstructed Image, Image Processing, Digital Image Editing, Image Conversion, Open-Source Software, Image Manipulation, Command-Line Image Tools

# Compare

## 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.