在Python中,如何读取图像的exif数据?

时间:2011-01-21 23:27:49

标签: python image python-imaging-library exif

我正在使用PIL。如何将EXIF数据转换为字典?

9 个答案:

答案 0 :(得分:144)

试试这个:

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

这应该为您提供由EXIF数字标签索引的字典。如果您想要由实际EXIF标记名称字符串索引的字典,请尝试类似:

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

答案 1 :(得分:26)

您还可以使用ExifRead模块:

import exifread
# Open image file for reading (binary mode)
f = open(path_name, 'rb')

# Return Exif tags
tags = exifread.process_file(f)

答案 2 :(得分:14)

我用这个:

import os,sys
from PIL import Image
from PIL.ExifTags import TAGS

for (k,v) in Image.open(sys.argv[1])._getexif().iteritems():
        print '%s = %s' % (TAGS.get(k), v)

或获取特定字段:

def get_field (exif,field) :
  for (k,v) in exif.iteritems():
     if TAGS.get(k) == field:
        return v

exif = image._getexif()
print get_field(exif,'ExposureTime')

答案 3 :(得分:3)

try:
    import PIL
    import PIL.Image as PILimage
    from PIL import ImageDraw, ImageFont, ImageEnhance
    from PIL.ExifTags import TAGS, GPSTAGS
except ImportError as err:
    exit(err)


class Worker(object):
    def __init__(self, img):
        self.img = img
        self.get_exif_data()
        self.lat = self.get_lat()
        self.lon = self.get_lon()
        self.date =self.get_date_time()
        super(Worker, self).__init__()

    @staticmethod
    def get_if_exist(data, key):
        if key in data:
            return data[key]
        return None

    @staticmethod
    def convert_to_degress(value):
        """Helper function to convert the GPS coordinates
        stored in the EXIF to degress in float format"""
        d0 = value[0][0]
        d1 = value[0][1]
        d = float(d0) / float(d1)
        m0 = value[1][0]
        m1 = value[1][1]
        m = float(m0) / float(m1)

        s0 = value[2][0]
        s1 = value[2][1]
        s = float(s0) / float(s1)

        return d + (m / 60.0) + (s / 3600.0)

    def get_exif_data(self):
        """Returns a dictionary from the exif data of an PIL Image item. Also
        converts the GPS Tags"""
        exif_data = {}
        info = self.img._getexif()
        if info:
            for tag, value in info.items():
                decoded = TAGS.get(tag, tag)
                if decoded == "GPSInfo":
                    gps_data = {}
                    for t in value:
                        sub_decoded = GPSTAGS.get(t, t)
                        gps_data[sub_decoded] = value[t]

                    exif_data[decoded] = gps_data
                else:
                    exif_data[decoded] = value
        self.exif_data = exif_data
        # return exif_data

    def get_lat(self):
        """Returns the latitude and longitude, if available, from the 
        provided exif_data (obtained through get_exif_data above)"""
        # print(exif_data)
        if 'GPSInfo' in self.exif_data:
            gps_info = self.exif_data["GPSInfo"]
            gps_latitude = self.get_if_exist(gps_info, "GPSLatitude")
            gps_latitude_ref = self.get_if_exist(gps_info, 'GPSLatitudeRef')
            if gps_latitude and gps_latitude_ref:
                lat = self.convert_to_degress(gps_latitude)
                if gps_latitude_ref != "N":
                    lat = 0 - lat
                lat = str(f"{lat:.{5}f}")
                return lat
        else:
            return None

    def get_lon(self):
        """Returns the latitude and longitude, if available, from the 
        provided exif_data (obtained through get_exif_data above)"""
        # print(exif_data)
        if 'GPSInfo' in self.exif_data:
            gps_info = self.exif_data["GPSInfo"]
            gps_longitude = self.get_if_exist(gps_info, 'GPSLongitude')
            gps_longitude_ref = self.get_if_exist(gps_info, 'GPSLongitudeRef')
            if gps_longitude and gps_longitude_ref:
                lon = self.convert_to_degress(gps_longitude)
                if gps_longitude_ref != "E":
                    lon = 0 - lon
                lon = str(f"{lon:.{5}f}")
                return lon
        else:
            return None

    def get_date_time(self):
        if 'DateTime' in self.exif_data:
            date_and_time = self.exif_data['DateTime']
            return date_and_time 


def main():
    date = image.date
    print(date)

if __name__ == '__main__':
    try:
        img = PILimage.open(path + filename)
        image = Worker(img)
        lat = image.lat
        lon = image.lon
        date = image.date
        print(date)

    except Exception as e:
        print(e)

答案 4 :(得分:2)

这是可能更不容易阅读的一种。希望这会有所帮助。

from PIL import Image
from PIL import ExifTags

exifData = {}
img = Image.open(picture.jpg)
exifDataRaw = img._getexif()
for tag, value in exifDataRaw.items():
    decodedTag = ExifTags.TAGS.get(tag, tag)
    exifData[decodedTag] = value

答案 5 :(得分:0)

我发现使用._getexif在更高版本的python中不起作用,而且,它是受保护的类,应该尽可能避免使用它。 深入研究调试器之后,这是我发现获取图像的EXIF数据的最佳方法:

from PIL import Image

def get_exif(path):
    return Image.open(path).info['parsed_exif']

这将返回图像的所有EXIF数据的字典。

注意:对于Python3.x,请使用Pillow而不是PIL

答案 6 :(得分:0)

对于Python3.x和PIL(作为Pillow安装),Image对象现在提供了一个getexif()方法,如果图像没有EXIF数据,则该方法返回<class 'PIL.Image.Exif'>NoneExif的输出可以通过强制转换简单地转换为dict

from PIL import Image, ExifTags

img = Image.open("sample.jpg")
img_exif = img.getexif()
print(type(img_exif))
# <class 'PIL.Image.Exif'>

if img_exif:
    print(dict(img_exif))
    # { .. 271: 'FUJIFILM', 305: 'Adobe Photoshop Lightroom 6.14 (Macintosh)', }

    img_exif_dict = dict(img_exif)
    for key, val in img_exif_dict.items():
        if key in ExifTags.TAGS:
            print(f"{ExifTags.TAGS[key]}:{repr(val)}")
else:
    print("Sorry, image has no exif data.")

已通过Python 3.6.8和Pillow==6.0.0测试。

答案 7 :(得分:0)

我通常使用pyexiv2在JPG文件中设置exif信息,但是当我在脚本QGIS脚本中导入库时会崩溃。

我使用库exif找到了解决方案:

https://pypi.org/project/exif/

它是如此易于使用,而且我使用Qgis也没有任何问题。

在此代码中,我将GPS坐标插入屏幕快照:

from exif import Image
with open(file_name, 'rb') as image_file:
    my_image = Image(image_file)

my_image.make = "Python"
my_image.gps_latitude_ref=exif_lat_ref
my_image.gps_latitude=exif_lat
my_image.gps_longitude_ref= exif_lon_ref
my_image.gps_longitude= exif_lon

with open(file_name, 'wb') as new_image_file:
    new_image_file.write(my_image.get_file())

答案 8 :(得分:0)

读取图片网址并获取标签

from PIL import Image
from urllib.request import urlopen
from PIL.ExifTags import TAGS 


def get_exif(filename):
    image = Image.open(filename)
    image.verify()
    return image._getexif()

def get_labeled_exif(exif):
    labeled = {}
    for (key, val) in exif.items():
        labeled[TAGS.get(key)] = val

    return labeled

my_image= urlopen(url)

exif = get_exif(my_image)
labeled = get_labeled_exif(exif)
print(labeled)

为了获得 GPS 坐标,Jayson DeLancey 有很棒的博文。