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Synopsis

identify file [ file ... ]

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Description

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 comment: 

    Image: images/aquarium.miff
      class: PseudoClass
      colors: 256
      signature: eb5dca81dd93ae7e6ffae99a5275a53e
      matte: False
      geometry: 640x480
      depth: 8
      bytes: 308135
      format: MIFF
      comments:
 
        Imported from MTV raster image:  aquarium.mtv

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Options

-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: 
   192x128
   384x256
   768x512
   1536x1024
   3072x2048
Finally, use this option to choose a particular resolution layer of a JBIG or JPEG image (e.g. -size 1024x768).

-verbose
print detailed information about the image.

This information is printed: image name; the image class (DirectClass or PseudoClass); the total number of unique colors; 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 for a description of the image class.

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Copyright

Copyright 1997 E. I. du Pont de Nemours and Company Permission to use, copy, modify, distribute, and sell this software and its documentation for any purpose is hereby granted without fee, provided that the above copyright notice appear in all copies and that both that copyright notice and this permission notice appear in supporting documentation, and that the name of E. I. du Pont de Nemours and Company not be used in advertising or publicity pertaining to distribution of the software without specific, written prior permission. E. I. du Pont de Nemours and Company makes no representations about the suitability of this software for any purpose. It is provided "as is" without express or implied warranty.

E. I. du Pont de Nemours and Company disclaims all warranties with regard to this software, including all implied warranties of merchantability and fitness, in no event shall E. I. du Pont de Nemours and Company be liable for any special, indirect or consequential damages or any damages whatsoever resulting from loss of use, data or profits, whether in an action of contract, negligence or other tortious action, arising out of or in connection with the use or performance of this software.

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Authors

John Cristy, cristy@mystic.es.dupont.com E.I. du Pont de Nemours and Company Incorporated.
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