1identify(1) General Commands Manual identify(1)
2
6 identify - describes the format and characteristics of one or more im‐
7 age files.
8
10 magick identify [options] input-file
11
13 The identify program is a member of the ImageMagick(1) suite of tools.
14 It describes the format and characteristics of one or more image files.
15 It also reports if an image is incomplete or corrupt. The information
16 returned includes the image number, the file name, the width and height
17 of the image, whether the image is colormapped or not, the number of
18 colors in the image (by default off use -define unique=true option),
19 the number of bytes in the image, the format of the image (JPEG, PNM,
20 etc.), and finally the number of seconds it took to read and process
21 the image. Many more attributes are available with the verbose option.
22 For more information about the identify command, point your browser to
24 file:///usr/share/doc/ImageMagick-7/www/identify.html or https://image‐
25 magick.org/script/identify.php.
26
28 Image Settings:
29 -alpha option on, activate, off, deactivate, set, opaque, copy
30 transparent, extract, background, or shape
31 -antialias remove pixel-aliasing
32 -authenticate value decrypt image with this password
33 -clip clip along the first path from the 8BIM profile
34 -clip-mask filename associate a clip mask with the image
35 -clip-path id clip along a named path from the 8BIM profile
36 -colorspace type alternate image colorspace
37 -crop geometry cut out a rectangular region of the image
38 -define format:option
39 define one or more image format options
40 -define unique=true return the number of unique colors in the image
41 -density geometry horizontal and vertical density of the image
42 -depth value image depth
43 -endian type endianness (MSB or LSB) of the image
44 -extract geometry extract area from image
45 -features distance analyze image features (e.g. contrast, correla‐
46 tion)
47 -format "string" output formatted image characteristics
48 -fuzz distance colors within this distance are considered equal
49 -gamma value of gamma correction
50 -interlace type type of image interlacing scheme
51 -interpolate method pixel color interpolation method
52 -limit type value pixel cache resource limit
53 -list type Color, Configure, Delegate, Format, Magic, Mod‐
54 ule,
55 Resource, or Type
56 -matte store matte channel if the image has one
57 -moments report image moments
58 -monitor monitor progress
59 -ping efficiently determine image attributes
60 -precision value maximum number of significant digits to print
61 -quiet suppress all warning messages
62 -read-mask filename associate a read mask with the image
63 -regard-warnings pay attention to warning messages
64 -respect-parentheses settings remain in effect until parenthesis
65 boundary
66 -sampling-factor geometry
67 horizontal and vertical sampling factor
68 -seed value seed a new sequence of pseudo-random numbers
69 -set attribute value set an image attribute
70 -size geometry width and height of image
71 -strip strip image of all profiles and comments
72 -unique display the number of unique colors in the image
73 -units type the units of image resolution
74 -verbose print detailed information about the image
75 -virtual-pixel method
76 virtual pixel access method
77 Image Operators:
79 -auto-orient automatically orient image
80 -channel mask set the image channel mask
81 -grayscale method convert image to grayscale
82 -negate replace each pixel with its complementary color
83 Miscellaneous Options:
85 -debug events display copious debugging information
86 -help print program options
87 -list type print a list of supported option arguments
88 -log format format of debugging information
89 -version print version information
90 By default, the image format of `file' is determined by its magic num‐
92 ber. To specify a particular image format, precede the filename with
93 an image format name and a colon (i.e. ps:image) or specify the image
94 type as the filename suffix (i.e. image.ps). Specify 'file' as '-' for
95 standard input or output.
96
98 Although some options appear to modify the file to be identified, the
99 identify command is strictly read only. For instance, the crop option
100 crops the in-memory image and then describes the result.
101
103 ImageMagick(1)
104
107 Copyright (C) 1999 ImageMagick Studio LLC. Additional copyrights and
108 licenses apply to this software, see file:///usr/share/doc/Image‐
109 Magick-7/www/license.html or https://imagemagick.org/script/license.php
110ImageMagick Date: 2009/01/10 01:00:00 identify(1)