summaryrefslogtreecommitdiff
path: root/rapid/metadata.py
diff options
context:
space:
mode:
Diffstat (limited to 'rapid/metadata.py')
-rwxr-xr-xrapid/metadata.py387
1 files changed, 387 insertions, 0 deletions
diff --git a/rapid/metadata.py b/rapid/metadata.py
new file mode 100755
index 0000000..8fc6820
--- /dev/null
+++ b/rapid/metadata.py
@@ -0,0 +1,387 @@
+#!/usr/bin/python
+# -*- coding: latin1 -*-
+
+### Copyright (C) 2007 Damon Lynch <damonlynch@gmail.com>
+
+### This program is free software; you can redistribute it and/or modify
+### it under the terms of the GNU General Public License as published by
+### the Free Software Foundation; either version 2 of the License, or
+### (at your option) any later version.
+
+### This program is distributed in the hope that it will be useful,
+### but WITHOUT ANY WARRANTY; without even the implied warranty of
+### MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+### GNU General Public License for more details.
+
+### You should have received a copy of the GNU General Public License
+### along with this program; if not, write to the Free Software
+### Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+
+import re
+import datetime
+import sys
+import config
+
+try:
+ import pyexiv2
+except ImportError:
+ sys.stderr.write("You need to install pyexiv2, the python binding for exiv2, to run this program.\n" )
+ sys.exit(1)
+
+#only pyexiv2 0.1.2 and 0.1.3 use the "Rational" class
+#is there a superior way to find which version of pyexiv2 is being used?
+if 'Rational' in dir(pyexiv2):
+ usesRational = True
+else:
+ usesRational = False
+
+
+class MetaData(pyexiv2.Image):
+ """
+ Class providing human readable access to image metadata
+ """
+
+ def aperture(self, missing=''):
+ """
+ Returns in string format the floating point value of the image's aperture.
+
+ Returns missing if the metadata value is not present.
+ """
+
+ try:
+ if usesRational:
+ a = self["Exif.Photo.FNumber"]
+ a0, a1 = str(a).split('/')
+ else:
+ a0, a1 = self["Exif.Photo.FNumber"]
+ a = float(a0) / float(a1)
+ return "%.1f" % a
+ except:
+ return missing
+
+ def iso(self, missing=''):
+ """
+ Returns in string format the integer value of the image's ISO.
+
+ Returns missing if the metadata value is not present.
+ """
+ try:
+ return "%s" % (self["Exif.Photo.ISOSpeedRatings"])
+ except:
+ return missing
+
+ def exposureTime(self, alternativeFormat=False, missing=''):
+ """
+ Returns in string format the exposure time of the image.
+
+ Returns missing if the metadata value is not present.
+
+ alternativeFormat is useful if the value is going to be used in a
+ purpose where / is an invalid character, e.g. file system names.
+
+ alternativeFormat is False:
+ For exposures less than one second, the result is formatted as a
+ fraction e.g. 1/125
+ For exposures greater than or equal to one second, the value is
+ formatted as an integer e.g. 30
+
+ alternativeFormat is True:
+ For exposures less than one second, the result is formatted as an
+ integer e.g. 125
+ For exposures less than one second but more than or equal to
+ one tenth of a second, the result is formatted as an integer
+ e.g. 3 representing 3/10 of a second
+ For exposures greater than or equal to one second, the value is
+ formatted as an integer with a trailing s e.g. 30s
+ """
+
+ try:
+ if usesRational:
+ e = str(self["Exif.Photo.ExposureTime"])
+ e0, e1 = e.split('/')
+ e0 = int(e0)
+ e1 = int(e1)
+ else:
+ e0, e1 = self["Exif.Photo.ExposureTime"]
+
+ if e1 > e0:
+ if alternativeFormat:
+ if e0 == 1:
+ return str(e1)
+ else:
+ return str(e0)
+ else:
+ return e
+ elif e0 > e1:
+ e = float(e0) / e1
+ if alternativeFormat:
+ return "%.0fs" % e
+ else:
+ return "%.0f" % e
+ else:
+ return "1s"
+ except:
+ return missing
+
+ def focalLength(self, missing=''):
+ """
+ Returns in string format the focal length of the lens used to record the image.
+
+ Returns missing if the metadata value is not present.
+ """
+ try:
+ if usesRational:
+ f = str(self["Exif.Photo.FocalLength"])
+ f0, f1 = f.split('/')
+ else:
+ f0, f1 = self["Exif.Photo.FocalLength"]
+
+ f0 = float(f0)
+ if not f1:
+ f1 = 1.0
+ else:
+ f1 = float(f1)
+
+ return "%.0f" % (f0 / f1)
+ except:
+ return missing
+
+
+ def cameraMake(self, missing=''):
+ """
+ Returns in string format the camera make (manufacturer) used to record the image.
+
+ Returns missing if the metadata value is not present.
+ """
+ try:
+ return self["Exif.Image.Make"].strip()
+ except:
+ return missing
+
+ def cameraModel(self, missing=''):
+ """
+ Returns in string format the camera model used to record the image.
+
+ Returns missing if the metadata value is not present.
+ """
+ try:
+ return self["Exif.Image.Model"].strip()
+ except:
+ return missing
+
+ def cameraSerial(self, missing=''):
+ try:
+ keys = self.exifKeys()
+ if 'Exif.Canon.SerialNumber' in keys:
+ v = self['Exif.Canon.SerialNumber']
+ elif 'Exif.Nikon3.SerialNumber' in keys:
+ v = self['Exif.Nikon3.SerialNumber']
+ elif 'Exif.OlympusEq.SerialNumber' in keys:
+ v = self['Exif.OlympusEq.SerialNumber']
+ elif 'Exif.Olympus.SerialNumber' in keys:
+ v = self['Exif.Olympus.SerialNumber']
+ elif 'Exif.Olympus.SerialNumber2' in keys:
+ v = self['Exif.Olympus.SerialNumber2']
+ elif 'Exif.Panasonic.SerialNumber' in keys:
+ v = self['Exif.Panasonic.SerialNumber']
+ elif 'Exif.Fujifilm.SerialNumber' in keys:
+ v = self['Exif.Fujifilm.SerialNumber']
+ elif 'Exif.Image.CameraSerialNumber' in keys:
+ v = self['Exif.Image.CameraSerialNumber']
+ else:
+ return missing
+ return str(v)
+ except:
+ return missing
+
+ def shutterCount(self, missing=''):
+ try:
+ keys = self.exifKeys()
+ if 'Exif.Nikon3.ShutterCount' in keys:
+ v = self['Exif.Nikon3.ShutterCount']
+ elif 'Exif.Canon.ImageNumber' in keys:
+ v = self['Exif.Canon.ImageNumber']
+ else:
+ return missing
+ return str(v)
+ except:
+ return missing
+
+ def ownerName(self, missing=''):
+ """ returns camera name recorded by select Canon cameras"""
+ try:
+ return self['Exif.Canon.OwnerName'].strip()
+ except:
+ return missing
+
+ def shortCameraModel(self, includeCharacters = '', missing=''):
+ """
+ Returns in shorterned string format the camera model used to record the image.
+
+ Returns missing if the metadata value is not present.
+
+ The short format is determined by the first occurence of a digit in the
+ camera model, including all alphaNumeric characters before and after
+ that digit up till a non-alphanumeric character.
+
+ Canon "Mark" designations are shortened prior to conversion.
+
+ Examples:
+ Canon EOS 300D DIGITAL -> 300D
+ Canon EOS 5D -> 5D
+ Canon EOS 5D Mark II -> 5DMkII
+ NIKON D2X -> D2X
+ NIKON D70 -> D70
+ X100,D540Z,C310Z -> X100
+
+ The optional includeCharacters allows additional characters to appear
+ before and after the digits.
+ Note: special includeCharacters MUST be escaped as per syntax of a
+ regular expressions (see documentation for module re)
+
+ Examples:
+
+ includeCharacters = '':
+ DSC-P92 -> P92
+ includeCharacters = '\-':
+ DSC-P92 -> DSC-P92
+
+ If a digit is not found in the camera model, the full length camera
+ model is returned.
+
+ Note: assume exif values are in ENGLISH, regardless of current platform
+ """
+ m = self.cameraModel()
+ m = m.replace(' Mark ', 'Mk')
+ if m:
+ s = r"(?:[^a-zA-Z0-9%s]?)(?P<model>[a-zA-Z0-9%s]*\d+[a-zA-Z0-9%s]*)"\
+ % (includeCharacters, includeCharacters, includeCharacters)
+ r = re.search(s, m)
+ if r:
+ return r.group("model")
+ else:
+ return m.strip()
+ else:
+ return missing
+
+ def dateTime(self, missing=''):
+ """
+ Returns in python datetime format the date and time the image was
+ recorded.
+
+ Trys to get value from exif key "Exif.Photo.DateTimeOriginal".
+ If that does not exist, trys key "Exif.Image.DateTime"
+
+ Returns missing either metadata value is not present.
+ """
+ keys = self.exifKeys()
+ try:
+ if "Exif.Photo.DateTimeOriginal" in keys:
+ return self["Exif.Photo.DateTimeOriginal"]
+ else:
+ return self["Exif.Image.DateTime"]
+ except:
+ return missing
+
+ def subSeconds(self, missing='00'):
+ """ returns the subsecond the image was taken, as recorded by the camera"""
+ try:
+ return str(self["Exif.Photo.SubSecTimeOriginal"])
+ except:
+ return missing
+
+ def orientation(self, missing=''):
+ """
+ Returns the orientation of the image, as recorded by the camera
+ """
+ try:
+ return self['Exif.Image.Orientation']
+ except:
+ return missing
+
+class DummyMetaData(MetaData):
+ """
+ Class which gives metadata values for an imaginary image.
+
+ Useful for displaying in preference examples etc. when no image is ready to
+ be downloaded.
+
+ See MetaData class for documentation of class methods.
+ """
+
+ def __init__(self):
+ pass
+
+ def readMetadata(self):
+ pass
+
+ def aperture(self, missing=''):
+ return "2.0"
+
+ def iso(self, missing=''):
+ return "100"
+
+ def exposureTime(self, alternativeFormat=False, missing=''):
+ if alternativeFormat:
+ return "4000"
+ else:
+ return "1/4000"
+
+ def focalLength(self, missing=''):
+ return "135"
+
+ def cameraMake(self, missing=''):
+ return "Canon"
+
+ def cameraModel(self, missing=''):
+ return "Canon EOS 5D"
+
+ def shortCameraModel(self, includeCharacters = '', missing=''):
+ return "5D"
+
+ def cameraSerial(self, missing=''):
+ return '730402168'
+
+ def shutterCount(self, missing=''):
+ return '387'
+
+ def ownerName(self, missing=''):
+ return 'Photographer Name'
+
+ def dateTime(self, missing=''):
+ return datetime.datetime.now()
+
+ def subSeconds(self, missing='00'):
+ return '57'
+
+ def orientation(self, missing=''):
+ return 1
+
+if __name__ == '__main__':
+ import sys
+
+ if (len(sys.argv) != 2):
+ print 'Usage: ' + sys.argv[0] + ' path/to/photo/containing/metadata'
+ m = DummyMetaData()
+
+ else:
+ m = MetaData(sys.argv[1])
+ m.readMetadata()
+
+# for i in m.exifKeys():
+# print i
+ print "f"+ m.aperture('missing ')
+ print "ISO " + m.iso('missing ')
+ print m.exposureTime(missing='missing ') + " sec"
+ print m.exposureTime(alternativeFormat=True, missing='missing ')
+ print m.focalLength('missing ') + "mm"
+ print m.cameraMake()
+ print m.cameraModel()
+ print m.shortCameraModel()
+ print m.shortCameraModel(includeCharacters = "\-")
+ print m.dateTime()
+ print m.orientation()
+ print 'Serial number:', m.cameraSerial()
+ print 'Shutter count:', m.shutterCount()
+ print 'Subseconds:', m.subSeconds()
+