identify コマンドか、exiftool コマンドを使う
identify -verbose /Users/takuya/Desktop/CA3G0323.JPG
exiftool /Users/takuya/Desktop/CA3G0323.JPG
写真の情報を取り出すにはexiftools が便利です
takuya@rena:~/Desktop$ exiftool /Users/takuya/Desktop/CA3G0323.JPG ExifTool Version Number : 9.76 File Name : CA3G0323.JPG Directory : /Users/takuya/Desktop File Size : 2.1 MB File Modification Date/Time : 2011:11:03 16:39:42+09:00 File Access Date/Time : 2015:02:23 00:39:35+09:00 File Inode Change Date/Time : 2015:02:23 00:39:34+09:00 File Permissions : rw------- File Type : JPEG MIME Type : image/jpeg Exif Byte Order : Big-endian (Motorola, MM) Image Description : CA3G0323 Make : KDDI-CA Camera Model Name : CA004 Orientation : Horizontal (normal) X Resolution : 72 Y Resolution : 72 Resolution Unit : inches Y Cb Cr Positioning : Centered Exposure Time : 1/25 Exif Version : 0220 Date/Time Original : 2011:11:03 16:39:42 Create Date : 2011:11:03 16:39:42 Components Configuration : Y, Cb, Cr, - Exposure Compensation : 0 Flash : No flash function Flashpix Version : 0100 Color Space : sRGB Exif Image Width : 3264 Exif Image Height : 1960 Interoperability Index : R98 - DCF basic file (sRGB) Interoperability Version : 0100 Custom Rendered : Normal Exposure Mode : Auto White Balance : Auto Digital Zoom Ratio : 1.133333333 Scene Capture Type : Standard Gain Control : None Saturation : Normal Subject Distance Range : Unknown PrintIM Version : 0300 Compression : JPEG (old-style) Thumbnail Offset : 32112 Thumbnail Length : 7068 Image Width : 3264 Image Height : 1960 Encoding Process : Baseline DCT, Huffman coding Bits Per Sample : 8 Color Components : 3 Y Cb Cr Sub Sampling : YCbCr4:2:2 (2 1) Image Size : 3264x1960 Shutter Speed : 1/25 Thumbnail Image : (Binary data 7068 bytes, use -b option to extract)
identify コマンドでも取り出せる
identify コマンドでもチャント取り出せるんだけど、こっちはもっと情報が多くて反って混乱しそうな感じはある。
Image: /Users/takuya/Desktop/CA3G0323.JPG
Format: JPEG (Joint Photographic Experts Group JFIF format)
Mime type: image/jpeg
Class: DirectClass
Geometry: 3264x1960+0+0
Resolution: 72x72
Print size: 45.3333x27.2222
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: 6397440
Red:
min: 0 (0)
max: 255 (1)
mean: 122.992 (0.482321)
standard deviation: 78.4245 (0.307547)
kurtosis: -1.16977
skewness: -0.175524
entropy: 0.939368
Green:
min: 0 (0)
max: 255 (1)
mean: 133.43 (0.523254)
standard deviation: 81.6469 (0.320184)
kurtosis: -1.27911
skewness: -0.285099
entropy: 0.956139
Blue:
min: 0 (0)
max: 255 (1)
mean: 130.948 (0.51352)
standard deviation: 88.2209 (0.345964)
kurtosis: -1.36886
skewness: -0.176941
entropy: 0.929486
Image statistics:
Overall:
min: 0 (0)
max: 255 (1)
mean: 129.123 (0.506365)
standard deviation: 82.8644 (0.324959)
kurtosis: -1.26568
skewness: -0.202622
entropy: 0.941664
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)
Background color: white
Border color: srgb(223,223,223)
Matte color: grey74
Transparent color: black
Interlace: None
Intensity: Undefined
Compose: Over
Page geometry: 3264x1960+0+0
Dispose: Undefined
Iterations: 0
Compression: JPEG
Quality: 99
Orientation: TopLeft
Properties:
date:create: 2015-02-23T00:39:34+09:00
date:modify: 2011-11-03T16:39:42+09:00
exif:ColorSpace: 1
exif:ComponentsConfiguration: 1, 2, 3, 0
exif:CustomRendered: 0
exif:DateTimeDigitized: 2011:11:03 16:39:42
exif:DateTimeOriginal: 2011:11:03 16:39:42
exif:DigitalZoomRatio: 3264/2880
exif:ExifImageLength: 1960
exif:ExifImageWidth: 3264
exif:ExifOffset: 306
exif:ExifVersion: 48, 50, 50, 48
exif:ExposureBiasValue: 0/10
exif:ExposureMode: 0
exif:ExposureTime: 800/20000
exif:Flash: 32
exif:FlashPixVersion: 48, 49, 48, 48
exif:GainControl: 0
exif:ImageDescription: CA3G0323
exif:InteroperabilityOffset: 31952
exif:Make: KDDI-CA
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exif:Model: CA004
exif:Orientation: 1
exif:PrintImageMatching: 80, 114, 105, 110, 116, 73, 77, 0, 48, 51, 48, 48, 0, 0, 0, 10, 0, 1, 0, 18, 0, 18, 0, 2, 1, 0, 0, 0, 0, 14, 0, 0, 0, 76, 1, 1, 255, 0, 0, 0, 1, 2, 129, 0, 0, 0, 1, 3, 129, 0, 0, 0, 1, 4, 128, 0, 0, 0, 1, 5, 130, 0, 0, 0, 1, 6, 130, 0, 0, 0, 1, 7, 130, 130, 130, 0, 241, 0, 246, 0, 246, 0, 10, 0, 0, 0, 0, 0, 0, 0, 0, 0
exif:ResolutionUnit: 2
exif:Saturation: 0
exif:SceneCaptureType: 0
exif:SubjectDistanceRange: 0
exif:thumbnail:Compression: 6
exif:thumbnail:InteroperabilityIndex: R98
exif:thumbnail:InteroperabilityVersion: 48, 49, 48, 48
exif:thumbnail:JPEGInterchangeFormat: 32100
exif:thumbnail:JPEGInterchangeFormatLength: 7068
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: 2x1,1x1,1x1
signature: b308b76ecd4fbc38fe031a0a5c26ba75d700a0b390fb2096aba4f9c087a63a58
Profiles:
Profile-exif: 39174 bytes
Artifacts:
filename: /Users/takuya/Desktop/CA3G0323.JPG
verbose: true
Tainted: False
Filesize: 2.239MB
Number pixels: 6.397M
Pixels per second: 319.87GB
User time: 0.000u
Elapsed time: 0:01.000
Version: ImageMagick 6.9.0-3 Q32 x86_64 2015-02-07 http://www.imagemagick.org
プログラムから使うには各言語ようにバインディングを使う
ruby
gem install exifr # たぶんexif ruby の略
または
gem install rmagick # たぶん ruby imageMagick の略
php
php は拡張機能としてdl するか php.ini で有効にする
php_exif
php の Imagick 関連は、別途インストールが必要なので、php 入門者にはちょっと敷居が高くてGDとかCairoがよく使われるんだけどね。。。画像処理の話はまた今度。
関連エントリ。
exiftool で任意のメタデータを取り出す - それマグで！
写真からGPS情報を抜き出して、地図にマッピングする - それマグで！
