Image Information
Command to get detailed information of an Image file.
This will be a short blog covering a couple commands that help identify the characteristics of an image file. I am using the open source tool Image Magick to extract information of an image file.
The first command gives us a brief summary of the image file, we then add the -verbose option to it to print detailed information about the image.
Details include color data, format information, pixel count, encode quality, chromaticity information etc.
the Identify command helps us get a brief summary of an image file -
magick identify beach-water.jpg
# Response
beach-water.jpg JPEG 1920x1280 1920x1280+0+0 8-bit sRGB 742692B 0.000u 0:00.001
add -verbose to the above command to get detailed information for the same image -
magick identify -verbose beach-water.jpg
# Response
Image:
Filename: beach-water.jpg
Permissions: rw-r--r--
Format: JPEG (Joint Photographic Experts Group JFIF format)
Mime type: image/jpeg
Class: DirectClass
Geometry: 1920x1280+0+0
Units: Undefined
Colorspace: sRGB
Type: TrueColor
Base type: Undefined
Endianness: Undefined
Depth: 8-bit
Channels: 3.0
Channel depth:
Red: 8-bit
Green: 8-bit
Blue: 8-bit
Channel statistics:
Pixels: 2457600
Red:
min: 0 (0)
max: 255 (1)
mean: 147.943 (0.580169)
median: 205 (0.803922)
standard deviation: 97.407 (0.381988)
kurtosis: -1.46581
skewness: -0.518676
entropy: 0.839009
Green:
min: 0 (0)
max: 255 (1)
mean: 180.35 (0.707255)
median: 205 (0.803922)
standard deviation: 55.3758 (0.21716)
kurtosis: -0.282359
skewness: -0.951444
entropy: 0.902978
Blue:
min: 0 (0)
max: 255 (1)
mean: 190.525 (0.747157)
median: 204 (0.8)
standard deviation: 39.0147 (0.152999)
kurtosis: 3.90787
skewness: -1.5826
entropy: 0.862709
Image statistics:
Overall:
min: 0 (0)
max: 255 (1)
mean: 172.939 (0.678194)
median: 204.667 (0.802614)
standard deviation: 63.9325 (0.250716)
kurtosis: 0.719899
skewness: -1.01757
entropy: 0.868232
Rendering intent: Perceptual
Gamma: 0.454545
Chromaticity:
red primary: (0.64,0.33,0.03)
green primary: (0.3,0.6,0.1)
blue primary: (0.15,0.06,0.79)
white point: (0.3127,0.329,0.3583)
Matte color: grey74
Background color: white
Border color: srgb(223,223,223)
Transparent color: black
Interlace: None
Intensity: Undefined
Compose: Over
Page geometry: 1920x1280+0+0
Dispose: Undefined
Iterations: 0
Compression: JPEG
Quality: 92
Orientation: Undefined
Properties:
date:create: 2024-01-20T10:44:42+00:00
date:modify: 2024-01-20T09:24:15+00:00
date:timestamp: 2024-01-20T10:46:43+00:00
jpeg:colorspace: 2
jpeg:sampling-factor: 2x2,1x1,1x1
signature: 4c4730a5e50a129380aa52eb55858b0876f306bdc8e0130ac0bc96d42ea45526
Artifacts:
verbose: true
Tainted: False
Filesize: 742692B
Number pixels: 2.4576M
Pixel cache type: Memory
Pixels per second: 94.2083MP
Time-to-live: 0:0:0:0 2024-01-20T10:46:43Z
User time: 0.020u
Elapsed time: 0:01.026
Version: ImageMagick 7.1.1-26 Q16-HDRI aarch64 21914 https://imagemagick.org
Please refer the Image Magick documentation for more details on these CLI tools - https://imagemagick.org/script/identify.php
