ImageMetaData.py

# -*- encoding: utf-8 -*-
#class for obtain metadata info from images

import os

#images lib
from PIL.ExifTags import TAGS, GPSTAGS
from PIL import Image
    
class ImageMetaData:

    def decode_gps_info(self,exif):
        gpsinfo = {}
        if 'GPSInfo' in exif:
            '''
            Raw Geo-references
            for key in exif['GPSInfo'].keys():
                decode = GPSTAGS.get(key,key)
                gpsinfo[decode] = exif['GPSInfo'][key]
            exif['GPSInfo'] = gpsinfo
            '''
        
            #Parse geo references.
            Nsec = exif['GPSInfo'][2][2][0] / float(exif['GPSInfo'][2][2][1])
            Nmin = exif['GPSInfo'][2][1][0] / float(exif['GPSInfo'][2][1][1])
            Ndeg = exif['GPSInfo'][2][0][0] / float(exif['GPSInfo'][2][0][1])
            Wsec = exif['GPSInfo'][4][2][0] / float(exif['GPSInfo'][4][2][1])
            Wmin = exif['GPSInfo'][4][1][0] / float(exif['GPSInfo'][4][1][1])
            Wdeg = exif['GPSInfo'][4][0][0] / float(exif['GPSInfo'][4][0][1])
            if exif['GPSInfo'][1] == 'N':
                Nmult = 1
            else:
                Nmult = -1
            if exif['GPSInfo'][1] == 'E':
                Wmult = 1
            else:
                Wmult = -1
            Lat = Nmult * (Ndeg + (Nmin + Nsec/60.0)/60.0)
            Lng = Wmult * (Wdeg + (Wmin + Wsec/60.0)/60.0)
            exif['GPSInfo'] = {"Lat" : Lat, "Lng" : Lng}
        else:
            print "No metadata info"
 
    def get_exif_metadata(self,image_path):
        ret = {}
        image = Image.open(image_path)
        if hasattr(image, '_getexif'):
            exifinfo = image._getexif()
            if exifinfo is not None:
                for tag, value in exifinfo.items():
                    decoded = TAGS.get(tag, tag)
                    ret[decoded] = value
        self.decode_gps_info(ret)
        return ret
    
    def printMetaData(self):
        for dirpath, dirnames, files in os.walk("images"):
            try:
                for name in files:
                    print "[+] Metadata for file: %s " %(dirpath+os.path.sep+name)
                    try:
                        exifData = {}
                        exif = self.get_exif_metadata(dirpath+os.path.sep+name)
                        for metadata in exif:
                            print "Metadata: %s - Value: %s " %(metadata, exif[metadata])
                        print "\n"

                    except:
                        import sys, traceback
                        #traceback.print_exc(file=sys.stdout)
            except Exception,e:
                print "Error to Obtain Images METADATA"
                pass