I'm working on a web app and currently migrating some stuff from an old app, but I hate that I have to open an image editor to get some info about images I'm migrating. Things like image dimensions.
Is there a command line tool I can use for such tasks in Linux?
For some image formats you can just use the file command:
$ file MyPNG.png
MyPNG.png: PNG image, 681 x 345, 8-bit/color RGB, non-interlaced
Not all image formats report the size (JPEG most notably doesn't):
$ file MyJpeg.jpg
MyJpeg.jpg: JPEG image data, JFIF standard 1.01
For those you will have to use something more elaborate, like:
$ convert MyJpeg.jpg -print "Size: %wx%h\n" /dev/null
Size: 380x380
The convert command is part of the ImageMagick package.
The best way to get this information is by using the identify command:
$ identify image.png
or only size attributes
$ identify -format "%wx%h\n" photo.jpg
** And if you need image details, try the following:
$ identify -verbose image.png
identify is part of ImageMagick, which you can install on Ubuntu like so:
$ sudo apt-get install imagemagick
exiv2 is "the tool" to get information from picture files:
~$exiv2 myimage.jpg
outputs:
File name : myimage.jpg
File size : 1196944 Bytes
MIME type : image/jpeg
Image size : 2592 x 1944
Camera make : LG Electronics
Camera model : LG-P970
Image timestamp : 2013:05:19 17:27:06
Image number :
Exposure time : 1/9 s
Aperture :
Exposure bias : 0 EV
Flash : Yes, compulsory
Flash bias :
Focal length : 3.7 mm
Subject distance:
ISO speed : 745
Exposure mode :
Metering mode : Average
Macro mode :
Image quality :
Exif Resolution :
White balance : Auto
Thumbnail : image/jpeg, 13776 Bytes
Copyright :
Exif comment :
Also, check out ExifTool by Phil Harvey; an example:
$ exiftool test.png
ExifTool Version Number : 8.15
File Name : test.png
Directory : .
File Size : 12 MB
File Modification Date/Time : 2014:02:13 13:04:52+01:00
File Permissions : rw-r--r--
File Type : PNG
MIME Type : image/png
Image Width : 2490
Image Height : 3424
Bit Depth : 8
Color Type : RGB
Compression : Deflate/Inflate
Filter : Adaptive
Interlace : Noninterlaced
Significant Bits : 8 8 8
Image Size : 2490x3424
Btw, I was looking to get information on dpi/resolution from the command line; and interestingly, sometimes none of these tools report that in an image (like in the above snippet); for more on that, see I want to change DPI with Imagemagick without changing the actual byte-size of the image data - Super User - however, identify -verbose seems to work for the same image as in the previous snippet:
$ identify -verbose test.png
Image: test.png
Format: PNG (Portable Network Graphics)
Class: DirectClass
Geometry: 2490x3424+0+0
Resolution: 72x72
Print size: 34.5833x47.5556
Units: Undefined
Type: TrueColor
Endianess: Undefined
Colorspace: RGB
Depth: 8-bit
Channel depth:
red: 8-bit
green: 8-bit
blue: 8-bit
Channel statistics:
Red:
min: 8 (0.0313725)
max: 255 (1)
mean: 237.541 (0.931533)
standard deviation: 37.2797 (0.146195)
kurtosis: 21.2876
skewness: -4.56853
Green:
min: 15 (0.0588235)
max: 255 (1)
mean: 240.007 (0.941204)
standard deviation: 37.8264 (0.148339)
kurtosis: 20.7241
skewness: -4.51584
Blue:
min: 9 (0.0352941)
max: 255 (1)
mean: 240.349 (0.942547)
standard deviation: 38.7118 (0.151811)
kurtosis: 22.255
skewness: -4.72275
Image statistics:
Overall:
min: 8 (0.0313725)
max: 255 (1)
mean: 179.474 (0.703821)
standard deviation: 108.711 (0.426316)
kurtosis: -0.958865
skewness: -0.995795
Rendering intent: Undefined
Interlace: None
Background color: white
Border color: rgb(223,223,223)
Matte color: grey74
Transparent color: black
Compose: Over
Page geometry: 2490x3424+0+0
Dispose: Undefined
Iterations: 0
Compression: Zip
Orientation: Undefined
Properties:
date:create: 2014-02-13T13:11:08+01:00
date:modify: 2014-02-13T13:04:52+01:00
signature: bada990d3ba29b311501146d9013d67cf36f667c6d39b1f28a72ce913924397d
Artifacts:
verbose: true
Tainted: False
Filesize: 12.52MB
Number pixels: 8.526M
Pixels per second: 7.894M
User time: 1.080u
Elapsed time: 0:02.080
Version: ImageMagick 6.6.2-6 2012-08-17 Q16 http://www.imagemagick.org
... although, it can be a bit tricky to read resolution in units of PixelsPerInch using identify -verbose - see ImageMagick • View topic - Cannot set units to pixelsperinch?.
mediainfo will list detailed metadata for images, audios, and videos. It is usually in the standard repos on Linux, and also available via homebrew on OSX.
From your media folder you can run it as:
mediainfo *
or
mediainfo .
Both commands will show info on all media files in the current folder and subfolders.
Show info on all JPG images starting from current folder (includes subfolders):
find . -iname "*.jpg" -exec mediainfo {} \;
For audios and videos mediainfo lists the bitrate of audio/video streams, encoding algorithms, container type, FOURCC code, i.e. XVID, X264, etc.
There is a GUI available in standard repos for major distros usually named mediainfo-gui.
identify -verbose image.png
identify is from the ImageMagick package.
It also extract exif informations from jpeg image.
You can try this command if above answers don't work:
rdjpgcom -verbose photo.jpg
It will show info like:
JPEG image is 564w * 779h, 3 color components, 8 bits per sample
Other method not posted above, is using feh (you need to install it):
feh -l image.jpg
Output:
NUM FORMAT WIDTH HEIGHT PIXELS SIZE(bytes) ALPHA FILENAME
1 jpeg 1280 960 1228800 91319 - image.jpg
Using:
feh -l *.jpg
Will output a table (as above) but with all images information (incrementing the NUM column). Useful to use in scripts.
I just discovered that less (with lessfile/lesspipe) can actually display image info by using ImageMagick behind the scene:
sudo apt-get install imagemagick
less wallpaper.jpg
Output
wallpaper.jpg JPEG 1920x1200 1920x1200+0+0 8-bit DirectClass 580KB 0.000u 0:00.000
The tool you want is file.
It shows a surprising amount of info about all sorts of files.
The syntax is:
$ file my_pic.jpg
You can use :
php -r "print_r(getimagesize('file:///archives/Picture/12 farvardin/20120331_013.jpg'));"
Also you can replace file:// with http://
If you're dealing with PNGs, there might be attributes that I've found difficult to read with almost any software. For those, you should use pngmeta:
pngmeta file.png
That's particularly useful for thumbnails, since, according to FreeDesktop standard, should be PNG formatted and store path information as a PNG attribute (Thumb::URI).
As provided in the rest of the answers you can use identify command with -verbose flag.
Below is a way to select specific information from the identify output, which is (almost) yaml format.
sudo pip install yq
# OR
pip install --user yq
# note: sed is used to remove what breaks yaml format (first line only).
identify -verbose image.png | sed 's/^Image:.*/Image:/' \
| yq -Y '.Image|{"Format","Geometry","Colorspace","Depth","Channel depth","Filesize","Number pixels"}'
output:
Format: JPEG (Joint Photographic Experts Group JFIF format)
Geometry: 1000x714+0+0
Colorspace: sRGB
Depth: 8-bit
Channel depth:
red: 8-bit
green: 8-bit
blue: 8-bit
Filesize: 125KB
Number pixels: 714K
json output (without -Y flag):
{
"Format": "JPEG (Joint Photographic Experts Group JFIF format)",
"Geometry": "1000x714+0+0",
"Colorspace": "sRGB",
"Depth": "8-bit",
"Channel depth": {
"red": "8-bit",
"green": "8-bit",
"blue": "8-bit"
},
"Filesize": "125KB",
"Number pixels": "714K"
}
Note: tesed with
.jpg.png.gif,.tif. Also does not seem to work with.svg(identifyoutput is differrent)
With GraphicsMagick:
# for minimal information
gm identify some-image.png
for detailed information
gm identify -verbose some-image.png
