> NAME

display - display an image on an X terminal
> Contents

Synopsis
Description
Options
Authors
Copyright
> Synopsis

identify file [ file ... ]

> 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: eb5dca81dd93ae7e6ffae99a527eb5dca81dd93ae7e6ffae99a5275a53e
    matte: False
    geometry: 640x480
       depth: 8
    bytes: 308135
    format: MIFF
    comments:
    Imported from MTV raster image: aquarium.mtv

Back to Contents  

> Options

Options are processed in command line order. Any option you specify on the command line remains in effect until it is explicitly changed by specifying the option again with a different effect.


> -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.

> -debug

enable debug printout

> -density <width>x<height>

vertical and horizontal resolution in pixels of the image

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

> -depth value

depth of the image

This is the number of bits in a pixel. The only acceptable values are 8 or 16. Use this option to specify the depth of raw images whose depth is unknown such as GRAY, RGB, or CMYK, or to change the depth of any image after it has been read.

> -format "string"

output formatted image characteristics

> -help

print usage instructions

> -ping

efficiently determine image characteristics

> -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 with an offset 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 scene number; image name; image size; the image class (DirectClass or PseudoClass); the total number of unique colors; and the number of seconds to read and transform the image. Refer to miff for a description of the image class.

If -colors is also specified, the total unique colors in the image and color reduction error values are printed. Refer to quantize for a description of these values.

Back to Contents  


 
>Authors
John Cristy, magick-users@imagemagick.org, ImageMagick Studio LLC.
Back to Contents
 
>Copyright
Copyright (C) 2002 ImageMagick Studio

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files ("ImageMagick"), 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 conditions:

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 merchantability, 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 LLC 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.

Back to Contents


ImageMagick Home Page Image manipulation software that works like magic.