Exif Manipulation Library for Python

In Python, how do I read the exif data for an image?

You can use the _getexif() protected method of a PIL Image.

import PIL.Image
img = PIL.Image.open('img.jpg')
exif_data = img._getexif()

This should give you a dictionary indexed by EXIF numeric tags. If you want the dictionary indexed by the actual EXIF tag name strings, try something like:

import PIL.ExifTags
exif = {
    PIL.ExifTags.TAGS[k]: v
    for k, v in img._getexif().items()
    if k in PIL.ExifTags.TAGS
}

Exif reading library

Option 1. Use pyexiv2. See: pyexiv2 Bug #824440: Python 3 support You need boost-python for py3k and also to manually apply the patch posted at the end of the bug above, but aside from that it works. Probably easiest to get up and running under latest Ubuntu.

Option 2. Use PIL Downside: this branch/fork doesn't seem to be actively developed.

from PIL import Image
from PIL.ExifTags import TAGS

image = Image.open("test.jpg")
exif = image._getexif()
# decode exif using TAGS

Option 3. Use PythonMagick

from PythonMagick import Image

img = Image("image.jpg")
print img.attribute("EXIF:Orientation")

See also: Exif manipulation library for python

Python: Remove Exif info from images

You can try loading the image with the Python Image Lirbary (PIL) and then save it again to a different file. That should remove the meta data.

Reading long exif tags in python

Here is the hilariously slow and inefficient method of calling exiftool on the command line using subprocess.check_output. Not my finest hour, but it works:

import matplotlib.pyplot as plt
import subprocess, glob, re

def get_magnification(filename):
    p = subprocess.check_output('exiftool -tab %s'%filename,shell=True) 

    xpix = float(re.findall('XpixCal=\d*.\d*',p)[0][8:])
    ypix = float(re.findall('YpixCal=\d*.\d*',p)[0][8:])

    mag = int(re.findall('p.\d+',p)[0][2:])

    return xpix,ypix,mag

xpix,ypix,mag = get_magnification('E3-9.tif')

print 'X pixels per nm: %.3f'%(xpix)
print 'Y pixels per nm: %.3f'%(ypix)
print 'Magnification:   %ix'%(mag)

How to modify EXIF data in python

import piexif
from PIL import Image

img = Image.open(fname)
exif_dict = piexif.load(img.info['exif'])

altitude = exif_dict['GPS'][piexif.GPSIFD.GPSAltitude]
print(altitude)

(550, 1) % some values are saved in a fractional format. This means 550m, (51, 2) would be 25,5m.

exif_dict['GPS'][piexif.GPSIFD.GPSAltitude] = (140, 1)

This sets the altitude to 140m

exif_bytes = piexif.dump(exif_dict)
img.save('_%s' % fname, "jpeg", exif=exif_bytes)

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