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使用 Python 從圖像中提取 gps 坐標

[英]Extracting gps coordinates from image using Python

from PIL import Image
from PIL.ExifTags import TAGS

# path to the image or video
imagename = "image.jpg"

# read the image data using PIL
image = Image.open(imagename)

# extract EXIF data
exifdata = image.getexif()

# iterating over all EXIF data fields
for tag_id in exifdata:
    # get the tag name, instead of human unreadable tag id
    tag = TAGS.get(tag_id, tag_id)
    data = exifdata.get(tag_id)
    # decode bytes 
    if isinstance(data, bytes):
        data = data.decode()
    print(f"{tag:25}: {data}")

ExifVersion: 0220 ComponentsConfiguration: ShutterSpeedValue: (1345, 100) DateTimeOriginal: 2020:08:27 09:43:15 DateTimeDigitized: 2020:08:27 09:43:15 ApertureValue: (185, 100) BrightnessValue: (930, 100) ExposureBiasValue: (0, 10) MaxApertureValue: (185, 100) MeteringMode: 2 Flash: 0 FocalLength: (358, 100) UserComment: ColorSpace: 1 ExifImageWidth: 4128 SceneCaptureType: 0 SubsecTime: 0424 SubsecTimeOriginal: 0424 SubsecTimeDigitized: 0424 ExifImageHeight: 1908 ImageLength: 1908 Make: samsung Model: SM-M305F 方向: 6 YCbCrPositioning: 1 ExposureTime: (1, 2786) ExifInteroperabilityOffset: 944 XResolution: (72, 1) FNumber: (190, 100,2) SceneType: (Y) ImageUniqueID:E13LLLI00PM E13LLMK03PA

ExposureProgram: 2 CustomRendered: 0 ISOSpeedRatings: 40 ResolutionUnit: 2 ExposureMode: 0 FlashPixVersion: 0100 ImageWidth: 4128 WhiteBalance: 0 Software: M305FDDU5CTF2 DateTime: 2020:08:27 09:43:15 DigitalZoomRatio: (0, 0) FocalLengthIn35mmFilm: 27 Contrast : 0 飽和度: 0 銳度: 0 ExifOffset: 226 MakerNote: 0100 Z@P

使用模塊piexif ( pip install piexif ),您可以按如下方式獲取exif 中的GPS 信息。

from pprint import pprint
from PIL import Image
import piexif

codec = 'ISO-8859-1'  # or latin-1

def exif_to_tag(exif_dict):
    exif_tag_dict = {}
    thumbnail = exif_dict.pop('thumbnail')
    exif_tag_dict['thumbnail'] = thumbnail.decode(codec)

    for ifd in exif_dict:
        exif_tag_dict[ifd] = {}
        for tag in exif_dict[ifd]:
            try:
                element = exif_dict[ifd][tag].decode(codec)

            except AttributeError:
                element = exif_dict[ifd][tag]

            exif_tag_dict[ifd][piexif.TAGS[ifd][tag]["name"]] = element

    return exif_tag_dict

def main():
    filename = 'IMG_2685.jpg'  # obviously one of your own pictures
    im = Image.open(filename)

    exif_dict = piexif.load(im.info.get('exif'))
    exif_dict = exif_to_tag(exif_dict)

    pprint(exif_dict['GPS'])

if __name__ == '__main__':
   main()

結果

{'GPSAltitude': (94549, 14993),
 'GPSAltitudeRef': 0,
 'GPSDateStamp': '2020:09:04',
 'GPSDestBearing': (1061399, 5644),
 'GPSDestBearingRef': 'T',
 'GPSHPositioningError': (5, 1),
 'GPSImgDirection': (1061399, 5644),
 'GPSImgDirectionRef': 'T',
 'GPSLatitude': ((12, 1), (34, 1), (1816, 100)),
 'GPSLatitudeRef': 'N',
 'GPSLongitude': ((99, 1), (57, 1), (4108, 100)),
 'GPSLongitudeRef': 'E',
 'GPSSpeed': (0, 1),
 'GPSSpeedRef': 'K',
 'GPSTimeStamp': ((13, 1), (2, 1), (4599, 100)),
 'GPSVersionID': (2, 2, 0, 0)}

這里exif_to_tag將 exif 代碼轉換為更具可讀性的標簽。

使用此模塊,您可以獲得信息。

pip install exif

然后使用此代碼!

from exif import Image

def decimal_coords(coords, ref):
    decimal_degrees = coords[0] + coords[1] / 60 + coords[2] / 3600
    if ref == "S" or ref =='W' :
        decimal_degrees = -decimal_degrees
    return decimal_degrees

def image_coordinates(image_path):

    with open(image_path, 'rb') as src:
        img = Image(src)
    if img.has_exif:
        try:
            img.gps_longitude
            coords = (decimal_coords(img.gps_latitude,
                      img.gps_latitude_ref),
                      decimal_coords(img.gps_longitude,
                      img.gps_longitude_ref))
        except AttributeError:
            print ('No Coordinates')
    else:
        print ('The Image has no EXIF information')
        
    return({"imageTakenTime":img.datetime_original, "geolocation_lat":coords[0],"geolocation_lng":coords[1]})

image_coordinates('Your image path')

結果

{'imageTakenTime': '2012:04:22 16:51:08',
 'geolocation_lat': 52.314166666666665,
 'geolocation_lng': 4.941}

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