ちょっと画像加工は飽きたので、、Exif情報を少し
Exif情報取得
画像には、Exif情報
Exchangeable image file format（エクスチェンジャブル・イメージ・ファイル・フォーマット）
要は、その画像のメタ情報、どんな機器で、いつ撮影したのか、とか色々な情報が入っています。
コマンドは、
identify -verbose ファイル名
|
1 |
identify -verbose IMG_1635.JPG |
iPhone6で撮影した画像の結果は
|
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Format: JPEG (Joint Photographic Experts Group JFIF format) Mime type: image/jpeg Class: DirectClass Geometry: 640x480+0+0 Resolution: 72x72 Print size: 8.88889x6.66667 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: 307200 Red: min: 0 (0) max: 255 (1) mean: 145.207 (0.569437) standard deviation: 74.0254 (0.290296) kurtosis: -1.08639 skewness: -0.601551 Green: min: 0 (0) max: 255 (1) mean: 113.71 (0.44592) standard deviation: 56.9285 (0.223249) kurtosis: -0.76993 skewness: -0.0699313 Blue: min: 0 (0) max: 255 (1) mean: 89.5862 (0.351319) standard deviation: 55.0695 (0.215959) kurtosis: 1.36365 skewness: 1.1978 Image statistics: Overall: min: 0 (0) max: 255 (1) mean: 116.167 (0.455559) standard deviation: 62.592 (0.245459) kurtosis: -0.536396 skewness: 0.218126 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: 640x480+0+0 Dispose: Undefined Iterations: 0 Compression: JPEG Quality: 96 Orientation: RightTop Properties: date:create: 2015-03-20T07:59:00+00:00 date:modify: 2015-03-20T07:59:00+00:00 exif:ApertureValue: 7892/3469 exif:BrightnessValue: 4314/1129 exif:ColorSpace: 1 exif:ComponentsConfiguration: 1, 2, 3, 0 exif:DateTime: 2015:03:20 16:54:36 exif:DateTimeDigitized: 2015:03:20 16:54:36 exif:DateTimeOriginal: 2015:03:20 16:54:36 exif:ExifImageLength: 2448 exif:ExifImageWidth: 3264 exif:ExifOffset: 192 exif:ExifVersion: 48, 50, 50, 49 exif:ExposureBiasValue: 0/1 exif:ExposureMode: 0 exif:ExposureProgram: 2 exif:ExposureTime: 1/30 exif:Flash: 16 exif:FlashPixVersion: 48, 49, 48, 48 exif:FNumber: 11/5 exif:FocalLength: 83/20 exif:FocalLengthIn35mmFilm: 29 exif:ISOSpeedRatings: 50 exif:Make: Apple exif:MakerNote: 65, 112, 112, 108, 101, 32, 105, 79, 83, 0, 0, 1, 77, 77, 0, 10, 0, 1, 0, 9, 0, 0, 0, 1, 0, 0, 0, 2, 0, 2, 0, 7, 0, 0, 2, 46, 0, 0, 0, 140, 0, 3, 0, 7, 0, 0, 0, 104, 0, 0, 2, 186, 0, 4, 0, 9, 0, 0, 0, 1, 0, 0, 0, 1, 0, 5, 0, 9, 0, 0, 0, 1, 0, 0, 0, 200, 0, 6, 0, 9, 0, 0, 0, 1, 0, 0, 0, 200, 0, 7, 0, 9, 0, 0, 0, 1, 0, 0, 0, 1, 0, 8, 0, 10, 0, 0, 0, 3, 0, 0, 3, 34, 0, 9, 0, 9, 0, 0, 0, 1, 0, 0, 1, 19, 0, 14, 0, 9, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 98, 112, 108, 105, 115, 116, 48, 48, 79, 17, 2, 0, 210, 0, 216, 0, 220, 0, 235, 0, 32, 1, 11, 1, 125, 0, 84, 0, 207, 0, 84, 0, 165, 0, 215, 0, 72, 0, 249, 0, 136, 1, 99, 1, 220, 0, 219, 0, 223, 0, 221, 0, 20, 1, 38, 1, 112, 0, 97, 0, 185, 0, 85, 0, 39, 1, 253, 1, 67, 0, 2, 1, 117, 1, 87, 1, 230, 0, 243, 0, 229, 0, 218, 0, 253, 0, 63, 1, 98, 0, 138, 0, 253, 0, 69, 0, 208, 0, 87, 1, 45, 0, 141, 0, 73, 1, 78, 1, 227, 0, 3, 1, 252, 0, 242, 0, 21, 1, 60, 1, 92, 0, 157, 0, 255, 0, 90, 0, 223, 0, 37, 1, 33, 0, 43, 0, 7, 1, 70, 1, 225, 0, 251, 0, 1, 1, 249, 0, 53, 1, 53, 1, 84, 0, 144, 0, 236, 0, 70, 0, 226, 0, 9, 1, 24, 0, 38, 0, 233, 0, 5, 1, 221, 0, 250, 0, 3, 1, 1, 1, 67, 1, 17, 1, 80, 0, 152, 0, 210, 0, 78, 0, 251, 0, 249, 0, 27, 0, 48, 0, 240, 0, 240, 0, 224, 0, 242, 0, 2, 1, 15, 1, 56, 1, 3, 1, 88, 0, 146, 0, 199, 0, 83, 0, 203, 0, 208, 0, 37, 0, 58, 0, 254, 0, 252, 0, 239, 0, 10, 1, 244, 0, 251, 0, 66, 1, 7, 1, 101, 0, 139, 0, 199, 0, 90, 0, 87, 1, 213, 0, 40, 0, 73, 0, 12, 1, 249, 0, 227, 0, 9, 1, 29, 1, 8, 1, 32, 1, 8, 1, 119, 0, 147, 0, 187, 0, 94, 0, 254, 1, 214, 0, 39, 0, 92, 0, 254, 0, 4, 1, 217, 0, 8, 1, 16, 1, 46, 1, 29, 1, 3, 1, 131, 0, 182, 0, 143, 0, 101, 0, 81, 2, 162, 0, 36, 0, 100, 0, 253, 0, 1, 1, 207, 0, 13, 1, 20, 1, 40, 1, 67, 1, 217, 0, 164, 0, 196, 0, 115, 0, 100, 0, 218, 1, 83, 0, 43, 0, 115, 0, 222, 0, 225, 0, 205, 0, 0, 1, 12, 1, 42, 1, 69, 1, 220, 0, 217, 0, 192, 0, 128, 0, 122, 0, 144, 0, 39, 0, 36, 0, 138, 0, 226, 0, 216, 0, 191, 0, 252, 0, 229, 0, 75, 1, 107, 1, 164, 0, 228, 0, 17, 1, 170, 0, 150, 0, 69, 0, 48, 0, 29, 0, 150, 0, 231, 0, 226, 0, 175, 0, 14, 1, 231, 0, 46, 1, 119, 1, 207, 0, 91, 1, 52, 1, 106, 0, 223, 0, 63, 0, 43, 0, 38, 0, 208, 0, 235, 0, 238, 0, 176, 0, 22, 1, 236, 0, 73, 1, 111, 1, 138, 1, 176, 1, 35, 1, 148, 0, 24, 1, 138, 0, 64, 0, 204, 0, 245, 0, 252, 0, 222, 0, 154, 0, 37, 1, 240, 0, 114, 1, 112, 1, 128, 1, 164, 1, 113, 1, 35, 1, 32, 1, 133, 0, 92, 0, 244, 0, 15, 1, 7, 1, 124, 0, 0, 8, 0, 0, 0, 0, 0, 0, 2, 1, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 2, 12, 98, 112, 108, 105, 115, 116, 48, 48, 212, 1, 2, 3, 4, 5, 6, 7, 8, 85, 102, 108, 97, 103, 115, 85, 118, 97, 108, 117, 101, 85, 101, 112, 111, 99, 104, 89, 116, 105, 109, 101, 115, 99, 97, 108, 101, 16, 1, 19, 0, 0, 124, 57, 60, 74, 33, 40, 16, 0, 18, 59, 154, 202, 0, 8, 17, 23, 29, 35, 45, 47, 56, 58, 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, 0, 0, 4, 48, 0, 0, 32, 217, 255, 255, 248, 30, 0, 0, 21, 25, 255, 255, 245, 131, 0, 0, 11, 86 exif:MeteringMode: 5 exif:Model: iPhone 6 exif:Orientation: 6 exif:ResolutionUnit: 2 exif:SceneCaptureType: 0 exif:SceneType: 1 exif:SensingMethod: 2 exif:ShutterSpeedValue: 5845/1191 exif:Software: 8.1.2 exif:SubjectArea: 1631, 1223, 1795, 1077 exif:SubSecTimeDigitized: 970 exif:SubSecTimeOriginal: 970 exif:WhiteBalance: 0 exif:XResolution: 72/1 exif:YCbCrPositioning: 1 exif:YResolution: 72/1 jpeg:colorspace: 2 jpeg:sampling-factor: 2x2,1x1,1x1 signature: 974c05b35a72a794e7fdc9a6779e4e62c1e3cd779e28ba5cbcc0091ae13e1aa7 unknown: 83/20, 83/20, 11/5, 11/5 Profiles: Profile-exif: 4092 bytes Artifacts: filename: IMG_1635.JPG verbose: true Tainted: False Filesize: 136KB Number pixels: 307K Pixels per second: 30.72MB User time: 0.000u Elapsed time: 0:01.009 Version: ImageMagick 6.8.9-7 Q16 x86_64 2014-09-19 http://www.imagemagick.org |
なんか色々入ってますね、一番問題になるのが位置情報、GPSを搭載しているスマートフォンとかは情報がはいっている場合があります。自宅でパシャと撮ってブログに上げたら自宅の場所が分かってしまいますね
怖い怖い。。。
Exif情報削除
このような情報は、削除してしまいましょう！
で実際の消し方は、
convert 元画像 -strip 出力画像
できえます。
|
1 |
convert IMG_1635_p.JPG -strip IMG_1635_p_non.JPG |
情報を再取得してみます。
|
1 |
identify -verbose IMG_1635_p_non.JPG |
結果
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Format: JPEG (Joint Photographic Experts Group JFIF format) Mime type: image/jpeg Class: DirectClass Geometry: 640x480+0+0 Resolution: 72x72 Print size: 8.88889x6.66667 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: 307200 Red: min: 0 (0) max: 255 (1) mean: 145.173 (0.569305) standard deviation: 73.9091 (0.28984) kurtosis: -1.08354 skewness: -0.601478 Green: min: 0 (0) max: 255 (1) mean: 113.71 (0.445923) standard deviation: 56.8607 (0.222983) kurtosis: -0.775392 skewness: -0.0727638 Blue: min: 0 (0) max: 255 (1) mean: 89.5129 (0.351031) standard deviation: 54.7478 (0.214697) kurtosis: 1.32912 skewness: 1.18103 Image statistics: Overall: min: 0 (0) max: 255 (1) mean: 116.132 (0.45542) standard deviation: 62.4314 (0.244829) kurtosis: -0.535295 skewness: 0.214065 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: 640x480+0+0 Dispose: Undefined Iterations: 0 Compression: JPEG Quality: 96 Orientation: Undefined Properties: date:create: 2015-03-25T12:33:54+00:00 date:modify: 2015-03-25T12:33:54+00:00 jpeg:colorspace: 2 jpeg:sampling-factor: 2x2,1x1,1x1 signature: 295b95723c6413f5f8ac39e3dbfc4aa0c2dc3e639cf0cbe76dbe8aefb087fde8 Artifacts: filename: IMG_1635_p_non.JPG verbose: true Tainted: False Filesize: 135KB Number pixels: 307K Pixels per second: 0B User time: 0.000u Elapsed time: 0:01.000 Version: ImageMagick 6.8.9-7 Q16 x86_64 2014-09-19 http://www.imagemagick.org |
余計なもの は、消えましたね
