View Image File Metadata From the Command Line

---------- 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:

arulalan@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

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