Python読み出し画像EXIF情報クラスライブラリの紹介と使用例

まず、Python Imaging Libraryをご紹介します.

 
  
 from PIL import Image 
  
 from PIL.ExifTags import TAGS 
   
  
def get_exif_data(fname):
     """Get embedded EXIF data from image file."""
     ret = {}
     try:
         img = Image.open(fname)
         if hasattr( img, '_getexif' ):
             exifinfo = img._getexif()
             if exifinfo != None:
                 for tag, value in exifinfo.items():
                     decoded = TAGS.get(tag, tag)
                     ret[decoded] = value
     except IOError:
         print 'IOERROR ' + fname
     return ret
 
  
if __name__ == '__main__':
     fileName = 'C:/Users/Leyond/Desktop/IMG_20121122_153514.jpg'
     exif = get_exif_data(fileName)
     print exif
 
 
 

返されるリストは次のとおりです.

 
  
 ExifVersion 
  
 ComponentsConfiguration 
  
 ExifImageWidth 
  
 DateTimeOriginal 
  
 DateTimeDigitized 
  
 ExifInteroperabilityOffset 
  
 FlashPixVersion 
  
 MeteringMode 
  
 LightSource 
  
 Flash 
  
 FocalLength 
  
 41986 
  
 ImageDescription 
  
 Make 
  
 Model 
  
 Orientation 
  
 YCbCrPositioning 
  
 41988 
  
 XResolution 
  
 YResolution 
  
 59932 
  
 ExposureTime 
  
 ExposureProgram 
  
 ColorSpace 
  
 41990 
  
 ISOSpeedRatings 
  
 ResolutionUnit 
  
 41987 
  
 FNumber 
  
 Software 
  
 DateTime 
  
 ExifImageHeight 
  
 ExifOffset 
 

そのうち59932は、16進数の大きな文字で、なぜか分かりません.PIL以外にも多くのクラスライブラリが使用できます.
Media Metadata for Python
EXIF.py
Python Exif Parser
A Blogger's Exif Parser
pyexiv2
次にEXIF.PYを見て、使い方はとても簡単です:exif.py IMG_20121122_153514.jpg

 
  
 EXIF ColorSpace (Short): sRGB 
  
 EXIF ComponentsConfiguration (Undefined): YCbCr 
  
 EXIF DateTimeDigitized (ASCII): 2012:11:22 15:35:14 
  
 EXIF DateTimeOriginal (ASCII): 2012:11:22 15:35:14 
  
 EXIF DigitalZoomRatio (Ratio): 1 
  
 EXIF ExifImageLength (Long): 2560 
  
 EXIF ExifImageWidth (Long): 1920 
  
 EXIF ExifVersion (Undefined): 0220 
  
 EXIF ExposureBiasValue (Signed Ratio): 0 
  
 EXIF ExposureMode (Short): Auto Exposure 
  
 EXIF ExposureProgram (Short): Portrait Mode 
  
 EXIF ExposureTime (Ratio): 1/256 
  
 EXIF FNumber (Ratio): 14/5 
  
 EXIF Flash (Short): Flash did not fire 
  
 EXIF FlashPixVersion (Undefined): 0100 
  
 EXIF FocalLength (Ratio): 35 
  
 EXIF ISOSpeedRatings (Short): 56 
  
 EXIF InteroperabilityOffset (Long): 4810 
  
 EXIF LightSource (Short): other light source 
  
 EXIF MeteringMode (Short): CenterWeightedAverage 
  
 EXIF Padding (Undefined): [] 
  
 EXIF SceneCaptureType (Short): Portrait 
  
 EXIF WhiteBalance (Short): Auto 
  
 Image DateTime (ASCII): 2012:11:24 09:44:50 
  
 Image ExifOffset (Long): 2396 
  
 Image ImageDescription (ASCII): 
  
 Image Make (ASCII): 
  
 Image Model (ASCII): 
  
 Image Orientation (Short): Horizontal (normal) 
  
 Image Padding (Undefined): [] 
  
 Image ResolutionUnit (Short): Pixels/Inch 
  
 Image Software (ASCII): Microsoft Windows Photo Viewer 6.1.7600.16385 
  
 Image XResolution (Ratio): 72 
  
 Image YCbCrPositioning (Short): Co-sited 
  
 Image YResolution (Ratio): 72 
  
 Thumbnail Compression (Short): JPEG (old-style) 
  
 Thumbnail JPEGInterchangeFormat (Long): 4970 
  
 Thumbnail JPEGInterchangeFormatLength (Long): 3883 
  
 Thumbnail Orientation (Short): Horizontal (normal) 
  
 Thumbnail ResolutionUnit (Short): Pixels/Inch 
  
 Thumbnail XResolution (Ratio): 72 
  
 Thumbnail YCbCrPositioning (Short): Co-sited 
  
 Thumbnail YResolution (Ratio): 72 
  
 
 

Python Exif Parserについては、更新が長くないようで、使い方も似ています.

 
  
 import exif 
  
 photo_path = "somePath\to\a\photo.jpg" 
  
 data = exif.parse(photo_path) 
  
 
 

他のクラスライブラリは自分で検討してください.