identify(1)                                                          identify(1)

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

       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 col‐
       ors  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/www/identify.html                    or

       Image Settings:
         -antialias           remove pixel-aliasing
         -authenticate value  decrypt image with this password
         -channel type        apply option to select image channels
         -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
         -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, Module,
                              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
         -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
         -log format          format of debugging information
         -list type           print a list of supported option arguments
         -version             print version information

       By default, the image format of `file' is determined by its magic number.
       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/imagemag‐
       ick/www/license.html or

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