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identify(1)							   identify(1)

       identify - describe the format and characteristics of one or more image

       identify [ options ... ] file [ file ... ]

       identify describes the format and characteristics of one or more image
       files.  It will also report if an image is incomplete or corrupt.  The
       information displayed includes the scene number, the file name, the
       width and height of the image, whether the image is colormapped or not,
       the number of colors in the image, the number of bytes in the image,
       the format of the image (JPEG, PNM, etc.), and finally the number of
       seconds it took to read and process the image.  An example line output
       from identify follows:

	    images/aquarium.miff 640x480 PseudoClass 256c 308135b MIFF 1s

       If -verbose is set, expect additional output including any image com‐

	    Image: images/aquarium.miff
	      class: PseudoClass
	      colors: 256
	      signature: eb5dca81dd93ae7e6ffae99a5275a53e
	      matte: False
	      geometry: 640x480
	      depth: 8
	      bytes: 308135
	      format: MIFF

		Imported from MTV raster image:	 aquarium.mtv

       -cache threshold
	      megabytes of memory available to the pixel cache.

	      Image pixels are stored in memory until 80 megabytes of memory
	      have been consumed.  Subsequent pixel operations are cached on
	      disk.  Operations to memory are significantly faster but if your
	      computer does not have a sufficient amount of free memory you
	      may want to adjust this threshold value.

       -density <width>x<height>
	      vertical and horizontal resolution in pixels of the image.

	      This option specifies an image density when decoding a Post‐
	      script or Portable Document page.	 The default is 72 pixels per
	      inch in the horizontal and vertical direction.  This option is
	      used in concert with -page.

       -format string
	      output formatted image characteristics.

	      Use this option to print information about the image in a format
	      of your choosing.	 You can include the image filename, type,
	      width, height, or other image attributes by embedding special
	      format characters:

		  %b   file size
		  %c   comment
		  %d   directory
		  %e   filename extention
		  %f   filename
		  %h   height
		  %i   input filename
		  %l   label
		  %m   magick
		  %n   number of scenes
		  %o   output filename
		  %p   page number
		  %q   quantum depth
		  %s   scene number
		  %t   top of filename
		  %u   unique temporary filename
		  %w   width
		  %x   x resolution
		  %y   y resolution
		  \n   newline
		  \r   carriage return

	      For example,

		   -format "%m:%f %wx%h"

	      displays MIFF:bird.miff 512x480 for an image titled bird.miff
	      and whose width is 512 and height is 480.

	      If the first character of string is @, the image comment is read
	      from a file titled by the remaining characters in the string.

       -ping  efficiently determine image characteristics.

	      This is a more efficient and less memory intensive way to query
	      if an image exists and what its size is.	Note, only the size of
	      the first image in a multi-frame image file is returned.

       -size <width>x<height>+<offset>
	      width and height of the image.

	      Use this option to specify the width and height of raw images
	      whose dimensions are unknown such as GRAY, RGB, or CMYK.	In
	      addition to width and height, use -size to skip any header
	      information in the image or tell the number of colors in a MAP
	      image file, (e.g. -size 640x512+256).

	      For Photo CD images, choose from these sizes:


	      Finally, use this option to choose a particular resolution layer
	      of a JBIG or JPEG image (e.g. -size 1024x768).

	      print detailed information about the image.

	      This information is printed:  image name;	 the image class
	      (DirectClass or PseudoClass);  the total number of unique col‐
	      ors; whether there is a matte associated with the image; the
	      number of runlength packets; the image size; the depth of the
	      image; the image format; the image scene; and finally any image
	      comment.	Refer to miff(1) for a description of the image class.

       display(1), animate(1), montage(1), mogrify(1), convert(1), combine(1),

       Copyright (C) 2001 ImageMagick Studio, a non-profit organization dedi‐
       cated to making software imaging solutions freely available.

       Permission is hereby granted, free of charge, to any person obtaining a
       copy of this software and associated documentation files ("ImageMag‐
       ick"), to deal in ImageMagick without restriction, including without
       limitation the rights to use, copy, modify, merge, publish, distribute,
       sublicense, and/or sell copies of ImageMagick, and to permit persons to
       whom the ImageMagick is furnished to do so, subject to the following

       The above copyright notice and this permission notice shall be included
       in all copies or substantial portions of ImageMagick.

       The software is provided "as is", without warranty of any kind, express
       or implied, including but not limited to the warranties of mer‐
       chantability, fitness for a particular purpose and noninfringement.  In
       no event shall ImageMagick Studio be liable for any claim, damages or
       other liability, whether in an action of contract, tort or otherwise,
       arising from, out of or in connection with ImageMagick or the use or
       other dealings in ImageMagick.

       Except as contained in this notice, the name of the ImageMagick Studio
       shall not be used in advertising or otherwise to promote the sale, use
       or other dealings in ImageMagick without prior written authorization
       from the ImageMagick Studio.

       John Cristy, E.I. du Pont De Nemours and Company Incorporated

ImageMagick			  1 May 1994			   identify(1)

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