---------- Forwarded message ----------
From: Tha.Suresh <jemenisuresh AT gmail.com>
Date: Tue, Jul 13, 2010 at 2:32 AM
View Image File Metadata From the Command Line
Did you know you can access all the information store in a JPG/PNG/GIF
file from the command line? Install the ImageMagick package and do
this:
identify -verbose image_file.jpg
The output will be something llike this:
arula...@arul-desktop:~/
Desktop$ identify -verbose thasu.jpg
Image: thasu.jpg
Format: JPEG (Joint Photographic Experts Group JFIF format)
Class: DirectClass
Geometry: 800x600+0+0
Resolution: 72x72
Print size: 11.1111x8.33333
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: 0 (0)
max: 255 (1)
mean: 40.7125 (0.159657)
standard deviation: 73.2441 (0.287232)
kurtosis: 0.609629
skewness: 1.53781
green:
min: 0 (0)
max: 255 (1)
mean: 52.529 (0.205996)
standard deviation: 91.3897 (0.358391)
kurtosis: 0.455854
skewness: 1.48962
blue:
min: 0 (0)
max: 255 (1)
mean: 51.1838 (0.200721)
standard deviation: 89.757 (0.351988)
kurtosis: 0.527622
skewness: 1.51096
Image statistics:
Overall:
min: 0 (0)
max: 255 (1)
mean: 36.1063 (0.141593)
standard deviation: 76.8034 (0.30119)
kurtosis: 2.40766
skewness: 2.01127
Rendering intent: Undefined
Interlace: None
Background color: white
Border color: rgb(223,223,223)
Matte color: grey74
Transparent color: black
Compose: Over
Page geometry: 800x600+0+0
Dispose: Undefined
Iterations: 0
Compression: JPEG
Orientation: Undefined
Properties:
date:create: 2010-07-11T19:50:46+05:00
date:modify: 2010-05-20T09:39:56+05:00
jpeg:colorspace: 2
jpeg:sampling-factor: 2x2,1x1,1x1
signature:
e794b1f09975d276aed3b92e5d45511e3e08ced69b1f8f1151eab18556679bda
Artifacts:
verbose: true
Tainted: False
Filesize: 97.8KiB
Number pixels: 469KiB
Pixels per second: 7.629MiB
User time: 0.030u
Elapsed time: 0:01.060
Version: ImageMagick 6.5.7-8 2009-11-26 Q16 http://www.imagemagick.org
You can use this to extract specific fields from image files and make
scripts that sort your images according to quality, background color
or image size.
By
_________
Regards,
Tha.Suresh
--
l...@iitd - http://tinyurl.com/ycueutm
