identify man page on Oracle

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identify(1)							   identify(1)

       identify	 -  describes  the  format  and characteristics of one or more
       image files.

       identify [options] input-file

       The identify program is a member of the ImageMagick(1) suite of	tools.
       It describes the format and characteristics of one or more image files.
       It also reports if an image is incomplete or corrupt.  The  information
       returned includes the image 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 (by default off use -define unique=true option),
       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. Many more attributes are available with the verbose option.

       For more information about the identify command, point your browser  to
       file:///usr/share/doc/ImageMagick-6.7.8/www/identify.html	    or

       Image Settings:
	 -alpha option	      on, activate, off, deactivate, set, opaque, copy
			      transparent, extract, background, or shape
	 -antialias	      remove pixel-aliasing
	 -authenticate value  decrypt image with this password
	 -channel type	      apply option to select image channels
	 -colorspace type     alternate image colorspace
	 -crop geometry	      cut out a rectangular region of the image
	 -define format:option
			      define one or more image format options
	 -define unique=true  return the number of unique colors in the image
	 -density geometry    horizontal and vertical density of the image
	 -depth value	      image depth
	 -extract geometry    extract area from image
	 -features distance   analyze image features (e.g. contrast,  correla‐
	 -format "string"     output formatted image characteristics
	 -fuzz distance	      colors within this distance are considered equal
	 -gamma value	      of gamma correction
	 -interlace type      type of image interlacing scheme
	 -interpolate method  pixel color interpolation method
	 -limit type value    pixel cache resource limit
	 -list	type	       Color, Configure, Delegate, Format, Magic, Mod‐
			      Resource, or Type
	 -matte		      store matte channel if the image has one
	 -monitor	      monitor progress
	 -ping		      efficiently determine image attributes
	 -quiet		      suppress all warning messages
	 -regard-warnings     pay attention to warning messages
	 -respect-parentheses settings	remain	in  effect  until  parenthesis
	 -sampling-factor geometry
			      horizontal and vertical sampling factor
	 -seed value	      seed a new sequence of pseudo-random numbers
	 -set attribute value set an image attribute
	 -size geometry	      width and height of image
	 -strip		      strip image of all profiles and comments
	 -unique	      display the number of unique colors in the image
	 -units type	      the units of image resolution
	 -verbose	      print detailed information about the image
	 -virtual-pixel method
			      virtual pixel access method

       Image Operators:
	 -negate	      replace each pixel with its complementary color

       Miscellaneous Options:
	 -debug events	      display copious debugging information
	 -help		      print program options
	 -list type	      print a list of supported option arguments
	 -log format	      format of debugging information
	 -version	      print version information

       By  default, the image format of `file' is determined by its magic num‐
       ber.  To specify a particular image format, precede the	filename  with
       an  image  format name and a colon (i.e. ps:image) or specify the image
       type as the filename suffix (i.e.  Specify 'file' as '-' for
       standard input or output.

       Although	 some  options appear to modify the file to be identified, the
       identify command is strictly read only. For instance, the  crop	option
       crops the in-memory image and then describes the result.


       Copyright  (C)  1999-2012 ImageMagick Studio LLC. Additional copyrights
       and	licenses      apply	 to	 this	   software,	   see
       file:///usr/share/doc/ImageMagick-6.7.8/www/license.html		    or

ImageMagick		   Date: 2009/01/10 01:00:00		   identify(1)

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