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#!/usr/bin/python
# -*- coding: latin1 -*-
### Copyright (C) 2007-10 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 subprocess
import config
import types
import time
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 <= 0.1.1 does not use the "Rational" class
if 'Rational' in dir(pyexiv2):
usesRational = True
else:
usesRational = False
#get versions of pyexiv2 and exiv2 libraries
if 'version_info' in dir(pyexiv2):
pyexiv2_version = pyexiv2.version_info
exiv2_version = pyexiv2.exiv2_version_info
baseclass = eval('pyexiv2.metadata.ImageMetadata')
else:
pyexiv2_version = (0,1,'x')
# try to determine the version of exiv2 from it's standard output
try:
proc = subprocess.Popen(['exiv2', '-V'], stdout=subprocess.PIPE)
output = proc.communicate()[0]
except:
output = None
exiv2_version = None
if output:
# assume output contains the line 'exiv2 0.x' or possibly
# 'exiv2 0.x.x'
start = output.find('exiv2 ')
if start < 0:
exiv2_version = None
else:
end = output.find('\n', start)
if end:
exiv2_v = output[6:end]
else:
exiv2_v = output[6:]
exiv2_version = []
dot = exiv2_v.find('.')
while dot > 0:
exiv2_version += [int(exiv2_v[:dot])]
exiv2_v = exiv2_v[dot+1:]
dot = exiv2_v.find('.')
exiv2_version += [int(exiv2_v)]
exiv2_version = tuple(exiv2_version)
baseclass = eval('pyexiv2.Image')
def __version_info(version):
if not version:
return ''
else:
v = ''
for i in version:
v += '.%s' % i
return v[1:]
def version_info():
return __version_info(pyexiv2_version)
def exiv2_version_info():
return __version_info(exiv2_version)
RAW_FILE_EXTENSIONS = ['arw', 'dcr', 'cr2', 'crw', 'dng', 'mos', 'mrw',
'nef', 'orf', 'pef', 'raf', 'raw', 'sr2', 'srw']
#exiv2 0.18.1 introduces support for Panasonic .RW2 files
#pyexiv2 in combination with exiv2 0.18 segfaults when trying to read an
#RW2 files, so we should not read those! exiv2 0.17 & pyexiv2 segfaults
#with MEF files.
if exiv2_version is not None:
if exiv2_version[0] > 0:
RAW_FILE_EXTENSIONS += ['rw2', 'mef']
else:
if exiv2_version[1] > 17:
RAW_FILE_EXTENSIONS += ['mef']
if exiv2_version[1] > 18:
RAW_FILE_EXTENSIONS += ['rw2']
else:
if len(exiv2_version) > 2:
if exiv2_version[2] >= 1:
RAW_FILE_EXTENSIONS += ['rw2']
RAW_FILE_EXTENSIONS.sort()
NON_RAW_IMAGE_FILE_EXTENSIONS = ['jpg', 'jpe', 'jpeg', 'tif', 'tiff']
class MetaData(baseclass):
"""
Class providing human readable access to image metadata
"""
__version01__ = pyexiv2_version[0] == 0 and pyexiv2_version[1] == 1
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)
# some values, e.g. Nikon, are in the format "10/1600"
if (e0 > 1) and (e0 < e1):
e1 = e1 / e0
e0 = 1
else:
e0, e1 = self["Exif.Photo.ExposureTime"]
if e1 > e0:
if alternativeFormat:
if e0 == 1:
return str(e1)
else:
return str(e0)
else:
return "%s/%s" % (e0,e1)
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.rpd_keys()
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.rpd_keys()
if 'Exif.Nikon3.ShutterCount' in keys:
v = self['Exif.Nikon3.ShutterCount']
elif 'Exif.Canon.FileNumber' in keys:
v = self['Exif.Canon.FileNumber']
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 occurrence of a digit in the
camera model, including all alphaNumeric characters before and after
that digit up till a non-alphanumeric character, but with these interventions:
1. Canon "Mark" designations are shortened prior to conversion.
2. Names like "Canon EOS DIGITAL REBEL XSi" do not have a number and must
and treated differently (see below)
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
Canon EOS DIGITAL REBEL XSi -> XSi
Canon EOS Digital Rebel XS -> XS
Canon EOS Digital Rebel XTi -> XTi
Canon EOS Kiss Digital X -> Digital
Canon EOS Digital Rebel XT -> XT
EOS Kiss Digital -> Digital
Canon Digital IXUS Wireless -> Wireless
Canon Digital IXUS i zoom -> zoom
Canon EOS Kiss Digital N -> N
Canon Digital IXUS IIs -> IIs
IXY Digital L -> L
Digital IXUS i -> i
IXY Digital -> Digital
Digital IXUS -> IXUS
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 last word 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:
head, space, model = m.strip().rpartition(' ')
return model
else:
return missing
def filterMangledDates(self, d):
"""
Some EXIF dates are badly formed. Try to fix them
"""
_datetime = d.strip()
# remove any weird characters at the end of the string
while _datetime and not _datetime[-1].isdigit():
_datetime = _datetime[:-1]
_date, _time = _datetime.split(' ')
_datetime = "%s %s" % (_date.replace(":", "-") , _time.replace("-", ":"))
try:
d = datetime.datetime.strptime(_datetime, '%Y-%m-%d %H:%M:%S')
except:
d = None
return d
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.rpd_keys()
try:
if "Exif.Photo.DateTimeOriginal" in keys:
v = self["Exif.Photo.DateTimeOriginal"]
else:
v = self["Exif.Image.DateTime"]
if isinstance(v, types.StringType):
v = self.filterMangledDates(v)
if v is None:
v = missing
return v
except:
return missing
def timeStamp(self, missing=''):
dt = self.dateTime(missing=None)
if not dt is None:
try:
t = dt.timetuple()
ts = time.mktime(t)
except:
ts = missing
else:
ts = missing
return ts
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
Return type int
"""
try:
v = self['Exif.Image.Orientation']
if isinstance(v, types.StringType):
# pyexiv2 >= 0.2 returns a string, not an int
v = int(v)
return v
except:
return missing
# following class methods are designed to cope with using both
# pyexiv2 0.1.x and pyexiv2 0.2.x
def getThumbnailData(self, max_size_needed=0):
"""
Returns a thumbnail of the image.
If the image supports multiple thumbnails, and max_size_needed
is not 0, then it will search for the smallest thumbnail that
matches the size required
The image will be in whatever format the thumbnail itself is,
typically a jpeg or tiff.
"""
if self.__version01__:
return pyexiv2.Image.getThumbnailData(self)[1]
else:
if not self.previews:
return None, None
else:
if max_size_needed:
for thumbnail in self.previews:
if thumbnail.dimensions[0] >= max_size_needed or thumbnail.dimensions[1] >= max_size_needed:
break
else:
thumbnail = self.previews[-1]
return thumbnail.data
def read(self):
if self.__version01__:
self.readMetadata()
else:
pyexiv2.metadata.ImageMetadata.read(self)
def rpd_keys(self):
if self.__version01__:
return pyexiv2.Image.exifKeys(self)
else:
return self.exif_keys
def __getitem__(self, key):
if self.__version01__:
v = pyexiv2.Image.__getitem__(self, key)
else:
v = pyexiv2.metadata.ImageMetadata.__getitem__(self, key).raw_value
# strip out null bytes from strings
if isinstance(v, types.StringType):
v = v.replace('\x00', '')
return v
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.read()
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()
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