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[ #usageExample Usage  | #optionsOption Summary ]
The identify program 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, 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.  See ../www/command-line-processing.htmlCommand Line Processing  for advice on how to structure your identify command or see below for example usages of the command.
  
Example Usage
We list a few examples of the identify command here to illustrate its usefulness and ease of use. To get started, lets identify an image in the JPEG format:
  identify rose.jpg
  rose.jpg JPEG 640x480 DirectClass 87kb 0.050u 0:01
Next, we look at the same image in greater detail:
  identify -verbose rose.jpg
  Image: rose.jpg
    Format: JPEG (Joint Photographic Experts Group JFIF format)
    Geometry: 640x480
    Class: DirectClass
    Type: TrueColor
    Endianess: Undefined
    Colorspace: RGB
    Depth: 8 bits
    Channel depth:
      Red: 8-bits
      Green: 8-bits
      Blue: 8-bits
    Channel statistics:
      Red:
        Min: 0 (0)
        Max: 255 (1)
        Mean: 228.152 (0.894713)
        Standard deviation: 70.3632 (0.275934)
      Green:
        Min: 1 (0.00392157)
        Max: 255 (1)
        Mean: 229.041 (0.898198)
        Standard deviation: 62.6714 (0.24577)
      Blue:
        Min: 0 (0)
        Max: 255 (1)
        Mean: 232.299 (0.910975)
        Standard deviation: 55.2762 (0.216769)
    Colors: 12314
    Rendering-intent: Undefined
    Resolution: 72x72
    Units: PixelsPerInch
    Filesize: 87kb
    Interlace: None
    Background Color: white
    Border Color: #DFDFDF
    Matte Color: grey74
    Dispose: Undefined
    Iterations: 0
    Compression: JPEG
    Quality: 100
    Orientation: Undefined
    JPEG-Colorspace: 2
    JPEG-Sampling-factors: 2x2,1x1,1x1
    Signature: e20b287cfed4f152572bdfb89f7f5f677d869c504620e8b1a9b3aa1d9d834785
    Tainted: False
    User Time: 0.040u
    Elapsed Time: 0:01
    Version: ImageMagick 6.2.0 02/20/05 Q16 http://www.imagemagick.org
The dimensions of depth a raw image must be specified on the command line:
  identify -depth 8 -size 640x480 image.raw
  rose.rgb RGB 70x46 DirectClass 9kb 0.000u 0:01
You can find additional examples of using identify in http://www-106.ibm.com/developerworks/library/l-graf/?ca=dnt-428Graphics from the Command Line .  Further discussion is available in http://www-106.ibm.com/developerworks/library/l-graf2/?ca=dgr-lnxw15GraphicsLineMore Graphics from the Command Line  and http://www.cit.gu.edu.au/~anthony/graphics/imagick6Examples of ImageMagick Usage .
  
Option Summary
The identify command recognizes these options.  Click on an option to get more details about how that option works.
  
  
    
Option    
Description  
  
    
../www/command-line-options.html#authenticate-authenticate value     
decrypt image with this password   
  
    
../www/command-line-options.html#channel-channel type     
apply option to select image channels   
  
    
../www/command-line-options.html#crop-crop geometry     
crop the image   
  
    
../www/command-line-options.html#debug-debug events     
display copious debugging information   
  
    
../www/command-line-options.html#define-define format:option     
define one or more image format options   
  
    
../www/command-line-options.html#density-density geometry     
horizontal and vertical density of the image   
  
    
../www/command-line-options.html#depth-depth value     
image depth   
  
    
../www/command-line-options.html#extract-extract geometry     
extract area from image   
  
    
../www/command-line-options.html#format-format string     
output formatted image characteristics   
  
    
../www/command-line-options.html#help-help     
print program options   
  
    
../www/command-line-options.html#interlace-interlace type     
type of image interlacing scheme   
  
    
../www/command-line-options.html#limit-limit type value     
pixel cache resource limit   
  
    
../www/command-line-options.html#list-list type     
Color, Configure, Delegate, Format, Magic, Module, Resource, or Type   
  
    
../www/command-line-options.html#log-log format     
format of debugging information   
  
    
../www/command-line-options.html#matte-matte     
store matte channel if the image has one   
  
    
../www/command-line-options.html#monitor-monitor     
monitor progress   
  
    
../www/command-line-options.html#quiet-quiet     
suppress all error or warning messages   
  
    
../www/command-line-options.html#sampling-factor-sampling-factor geometry     
horizontal and vertical sampling factor   
  
    
../www/command-line-options.html#set-set attribute value     
set an image attribute   
  
    
../www/command-line-options.html#size-size geometry     
width and height of image   
  
    
../www/command-line-options.html#strip-strip     
strip image of all profiles and comments   
  
    
../www/command-line-options.html#units-units type     
the units of image resolution   
  
    
../www/command-line-options.html#verbose-verbose     
print detailed information about the image   
  
    
../www/command-line-options.html#version-version     
print version information   
  
    
../www/command-line-options.html#virtual-pixel-virtual-pixel method     
access method for pixels outside the boundaries of the image   
  
      

      
 
    

  

  

  

    
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