I wish to read image description text from the image property tab (right click) with c++ or python.
Is there anyway to do it? Looks like Opencv is not supporting it, I guess. BTW, my OS is ubuntu 16.04.
Thanks,
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If you are on Ubuntu, you probably have ImageMagick installed and that has a program called identify within the suite. You can just run the following in a Terminal at the command-line, or you could run a Python subprocess and grab its output:
identify -verbose someImage.jpg
Sample Output
Image: /Users/mark/Desktop/IMG_2326.JPG
Format: JPEG (Joint Photographic Experts Group JFIF format)
Mime type: image/jpeg
Class: DirectClass
Geometry: 3264x2448+0+0
Resolution: 72x72
Print size: 45.3333x34
Units: PixelsPerInch
Type: TrueColor
Endianess: Undefined
Colorspace: sRGB
Depth: 8-bit
Channel depth:
Red: 8-bit
Green: 8-bit
Blue: 8-bit
Channel statistics:
Pixels: 7990272
Red:
min: 0 (0)
max: 255 (1)
mean: 139.125 (0.545587)
standard deviation: 62.0934 (0.243503)
kurtosis: -0.948773
skewness: -0.255567
entropy: 0.980761
Green:
min: 0 (0)
max: 255 (1)
mean: 129.827 (0.509124)
standard deviation: 63.4802 (0.248942)
kurtosis: -0.744472
skewness: -0.322559
entropy: 0.978628
Blue:
min: 0 (0)
max: 255 (1)
mean: 121.768 (0.477522)
standard deviation: 63.6425 (0.249578)
kurtosis: -1.14208
skewness: 0.0243162
entropy: 0.980614
Image statistics:
Overall:
min: 0 (0)
max: 255 (1)
mean: 130.24 (0.510744)
standard deviation: 63.4733 (0.248915)
kurtosis: -0.968273
skewness: -0.18575
entropy: 0.980001
Rendering intent: Perceptual
Gamma: 0.454545
Chromaticity:
red primary: (0.64,0.33)
green primary: (0.3,0.6)
blue primary: (0.15,0.06)
white point: (0.3127,0.329)
Matte color: grey74
Background color: white
Border color: srgb(223,223,223)
Transparent color: none
Interlace: None
Intensity: Undefined
Compose: Over
Page geometry: 3264x2448+0+0
Dispose: Undefined
Iterations: 0
Compression: JPEG
Quality: 96
Orientation: TopLeft
Properties:
date:create: 2017-05-31T13:53:16+01:00
date:modify: 2014-09-23T08:22:25+01:00
exif:ApertureValue: 4845/1918
exif:BrightnessValue: 6155/1061
exif:ColorSpace: 1
exif:ComponentsConfiguration: 1, 2, 3, 0
exif:DateTime: 2014:09:23 08:22:25
exif:DateTimeDigitized: 2014:09:23 08:22:25
exif:DateTimeOriginal: 2014:09:23 08:22:25
exif:ExifImageLength: 2448
exif:ExifImageWidth: 3264
exif:ExifOffset: 204
exif:ExifVersion: 48, 50, 50, 49
exif:ExposureMode: 0
exif:ExposureProgram: 2
exif:ExposureTime: 1/120
exif:Flash: 24
exif:FlashPixVersion: 48, 49, 48, 48
exif:FNumber: 12/5
exif:FocalLength: 103/25
exif:FocalLengthIn35mmFilm: 33
exif:GPSAltitude: 10003/299
exif:GPSAltitudeRef: 0
exif:GPSInfo: 946
exif:GPSLatitude: 51/1, 51/1, 347/100
exif:GPSLatitudeRef: N
exif:GPSLongitude: 2/1, 12/1, 1992/100
exif:GPSLongitudeRef: W
exif:GPSTimeStamp: 7/1, 22/1, 2456/100
exif:ISOSpeedRatings: 64
exif:Make: Apple
exif:MakerNote: 65, 112, 112, 108, 101, 32, 105, 79, 83, 0, 0, 1, 77, 77, 0, 6, 0, 1, 0, 9, 0, 0, 0, 1, 0, 0, 0, 0, 0, 3, 0, 7, 0, 0, 0, 104, 0, 0, 0, 92, 0, 4, 0, 9, 0, 0, 0, 1, 0, 0, 0, 1, 0, 5, 0, 9, 0, 0, 0, 1, 0, 0, 0, 208, 0, 6, 0, 9, 0, 0, 0, 1, 0, 0, 0, 218, 0, 7, 0, 9, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 0, 98, 112, 108, 105, 115, 116, 48, 48, 212, 1, 2, 3, 4, 5, 6, 7, 8, 89, 116, 105, 109, 101, 115, 99, 97, 108, 101, 85, 101, 112, 111, 99, 104, 85, 118, 97, 108, 117, 101, 85, 102, 108, 97, 103, 115, 18, 59, 154, 202, 0, 16, 0, 19, 0, 0, 18, 143, 64, 67, 109, 189, 16, 1, 8, 17, 27, 33, 39, 45, 50, 52, 61, 0, 0, 0, 0, 0, 0, 1, 1, 0, 0, 0, 0, 0, 0, 0, 9, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 63
exif:MeteringMode: 5
exif:Model: iPhone 5
exif:Orientation: 1
exif:ResolutionUnit: 2
exif:SceneCaptureType: 0
exif:SceneType: 1
exif:SensingMethod: 2
exif:ShutterSpeedValue: 5567/806
exif:Software: 7.1.2
exif:SubjectArea: 1631, 1223, 1795, 1077
exif:SubSecTimeDigitized: 918
exif:SubSecTimeOriginal: 918
exif:thumbnail:Compression: 6
exif:thumbnail:JPEGInterchangeFormat: 1210
exif:thumbnail:JPEGInterchangeFormatLength: 12195
exif:thumbnail:ResolutionUnit: 2
exif:thumbnail:XResolution: 72/1
exif:thumbnail:YResolution: 72/1
exif:WhiteBalance: 0
exif:XResolution: 72/1
exif:YCbCrPositioning: 1
exif:YResolution: 72/1
jpeg:colorspace: 2
jpeg:sampling-factor: 2x2,1x1,1x1
signature: 84dc83ac4ff07920155036d321be9b8fe687be8b5eb68a76e20518b3e6f048f8
unknown: 103/25, 103/25, 12/5, 12/5
Profiles:
Profile-exif: 16380 bytes
Artifacts:
verbose: true
Tainted: False
Filesize: 3.9071MiB
Number pixels: 7.99027M
Pixels per second: 47.0016MB
User time: 0.150u
Elapsed time: 0:01.170
Version: ImageMagick 7.0.5-6 Q16 x86_64 2017-05-15 http://www.imagemagick.org
Another option is exiftool, which you run like this at the command-line, and which you could also run as a subprocess in Python:
exiftool ~/Desktop/IMG_2326.JPG
Sample Output
ExifTool Version Number : 10.50
File Name : IMG_2326.JPG
Directory : /Users/mark/Desktop
File Size : 3.9 MB
File Modification Date/Time : 2014:09:23 08:22:25+01:00
File Access Date/Time : 2017:05:31 13:57:20+01:00
File Inode Change Date/Time : 2017:05:31 13:53:16+01:00
File Permissions : rw-------
File Type : JPEG
File Type Extension : jpg
MIME Type : image/jpeg
Exif Byte Order : Big-endian (Motorola, MM)
Make : Apple
Camera Model Name : iPhone 5
Orientation : Horizontal (normal)
X Resolution : 72
Y Resolution : 72
Resolution Unit : inches
Software : 7.1.2
Modify Date : 2014:09:23 08:22:25
Y Cb Cr Positioning : Centered
Exposure Time : 1/120
F Number : 2.4
Exposure Program : Program AE
ISO : 64
Exif Version : 0221
Date/Time Original : 2014:09:23 08:22:25
Create Date : 2014:09:23 08:22:25
Components Configuration : Y, Cb, Cr, -
Shutter Speed Value : 1/120
Aperture Value : 2.4
Brightness Value : 5.801131008
Metering Mode : Multi-segment
Flash : Auto, Did not fire
Focal Length : 4.1 mm
Subject Area : 1631 1223 1795 1077
Run Time Scale : 1000000000
Run Time Epoch : 0
Run Time Value : 20406467784125
Run Time Flags : Valid
Sub Sec Time Original : 918
Sub Sec Time Digitized : 918
Flashpix Version : 0100
Color Space : sRGB
Exif Image Width : 3264
Exif Image Height : 2448
Sensing Method : One-chip color area
Scene Type : Directly photographed
Exposure Mode : Auto
White Balance : Auto
Focal Length In 35mm Format : 33 mm
Scene Capture Type : Standard
Lens Info : 4.12mm f/2.4
Lens Make : Apple
Lens Model : iPhone 5 back camera 4.12mm f/2.4
GPS Latitude Ref : North
GPS Longitude Ref : West
GPS Altitude Ref : Above Sea Level
GPS Time Stamp : 07:22:24.56
Compression : JPEG (old-style)
Thumbnail Offset : 1222
Thumbnail Length : 12195
Image Width : 3264
Image Height : 2448
Encoding Process : Baseline DCT, Huffman coding
Bits Per Sample : 8
Color Components : 3
Y Cb Cr Sub Sampling : YCbCr4:2:0 (2 2)
Aperture : 2.4
GPS Altitude : 33.4 m Above Sea Level
GPS Latitude : 51 deg 51' 3.47" N
GPS Longitude : 2 deg 12' 19.92" W
GPS Position : 51 deg 51' 3.47" N, 2 deg 12' 19.92" W
Image Size : 3264x2448
Megapixels : 8.0
Run Time Since Power Up : 5:40:06
Scale Factor To 35 mm Equivalent: 8.0
Shutter Speed : 1/120
Create Date : 2014:09:23 08:22:25.918
Date/Time Original : 2014:09:23 08:22:25.918
Thumbnail Image : (Binary data 12195 bytes, use -b option to extract)
Circle Of Confusion : 0.004 mm
Field Of View : 57.2 deg
Focal Length : 4.1 mm (35 mm equivalent: 33.0 mm)
Hyperfocal Distance : 1.89 m
Light Value : 10.1
Another option is exiv2 which is available from here and also has various library APIs available.
I have not used it and cannot endorse it, but there is also a Python interface to exiv2.
In case you wanted a hand on Python subprocesses, you do this sort of thing:
import subprocess
...
...
p = subprocess.Popen(['identify -verbose someImage.jpg'], stdout=subprocess.PIPE)
retcode = p.wait()
data = p.stdout.read()
Mark Setchell
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With Opencv we can able to read image type,width,height,Depth but we cant able to read other parameters related to ISo,ShutterSpeed,Brightness,Description and Date Modified,Created. If you want to get that information you can get it using C#
niranjan reddy
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