identify(1)identify(1)NAMEidentify - describe the format and characteristics of one
or more image files.
SYNOPSISidentify [ options ... ] file [ file ... ]
DESCRIPTIONidentify 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
OPTIONS-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.
-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 pixels per inch in the horizontal
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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.
-format string
output formatted image characteristics.
Use this option to print information about the
image in a format of your choosing. You can
include the image filename, type, width, height, or
other image attributes by embedding special format
characters:
%b file size
%c comment
%d directory
%e filename extention
%f filename
%h height
%i input filename
%k number of unique colors
%l label
%m magick
%n number of scenes
%o output filename
%p page number
%q quantum depth
%s scene number
%t top of filename
%u unique temporary filename
%w width
%x x resolution
%y y resolution
\n newline
\r carriage return
For example,
-format "%m:%f %wx%h"
displays MIFF:bird.miff 512x480 for an image titled
bird.miff and whose width is 512 and height is 480.
If the first character of string is @, the image
comment is read from a file titled by the remaining
characters in the string.
-size <width>x<height>+<offset>
width and height of the image.
Use this option to specify the width and height of
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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(1) for a
description of the image class.
SEE ALSOdisplay(1), animate(1), montage(1), mogrify(1),
convert(1), composite(1)COPYRIGHT
Copyright (C) 2001 ImageMagick Studio, a non-profit
organization dedicated to making software imaging
solutions freely available.
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
ImageMagick $Date: 2001/09/19 14:16:03 $ 3
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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 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.
AUTHORS
John Cristy, E.I. du Pont De Nemours and Company
Incorporated
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