Python读取图片EXIF信息类库介绍和使用实例

首先要介绍的是 Python Imaging Library，使用方法如下：

代码如下：

from PIL import Image

from PIL.ExifTags import TAGS

def get_exif_data(fname):

    """Get embedded EXIF data from image file."""

    ret = {}

    try:

        img = Image.open(fname)

        if hasattr( img, '_getexif' ):

            exifinfo = img._getexif()

            if exifinfo != None:

                for tag, value in exifinfo.items():

                    decoded = TAGS.get(tag, tag)

                    ret[decoded] = value

    except IOError:

        print 'IOERROR ' + fname

    return ret


if __name__ == '__main__':

    fileName = 'C:/Users/Leyond/Desktop/IMG_20121122_153514.jpg'

    exif = get_exif_data(fileName)

    print exif

返回的清单如下：

代码如下：

ExifVersion

ComponentsConfiguration

ExifImageWidth

DateTimeOriginal

DateTimeDigitized

ExifInteroperabilityOffset

FlashPixVersion

MeteringMode

LightSource

Flash

FocalLength

41986

ImageDescription

Make

Model

Orientation

YCbCrPositioning

41988

XResolution

YResolution

59932

ExposureTime

ExposureProgram

ColorSpace

41990

ISOSpeedRatings

ResolutionUnit

41987

FNumber

Software

DateTime

ExifImageHeight

ExifOffset

其中59932,是一大串十六进制的字符，不知为啥。除了PIL之外，还有许多类库可供使用：

Media Metadata for Python

EXIF.py

Python Exif Parser

A Blogger's Exif Parser

pyexiv2

接着看EXIF.PY，使用方法非常简单：exif.py IMG_20121122_153514.jpg

代码如下：

EXIF ColorSpace (Short): sRGB

EXIF ComponentsConfiguration (Undefined): YCbCr

EXIF DateTimeDigitized (ASCII): 2012:11:22 15:35:14

EXIF DateTimeOriginal (ASCII): 2012:11:22 15:35:14

EXIF DigitalZoomRatio (Ratio): 1

EXIF ExifImageLength (Long): 2560

EXIF ExifImageWidth (Long): 1920

EXIF ExifVersion (Undefined): 0220

EXIF ExposureBiasValue (Signed Ratio): 0

EXIF ExposureMode (Short): Auto Exposure

EXIF ExposureProgram (Short): Portrait Mode

EXIF ExposureTime (Ratio): 1/256

EXIF FNumber (Ratio): 14/5

EXIF Flash (Short): Flash did not fire

EXIF FlashPixVersion (Undefined): 0100

EXIF FocalLength (Ratio): 35

EXIF ISOSpeedRatings (Short): 56

EXIF InteroperabilityOffset (Long): 4810

EXIF LightSource (Short): other light source

EXIF MeteringMode (Short): CenterWeightedAverage

EXIF Padding (Undefined): []

EXIF SceneCaptureType (Short): Portrait

EXIF WhiteBalance (Short): Auto

Image DateTime (ASCII): 2012:11:24 09:44:50

Image ExifOffset (Long): 2396

Image ImageDescription (ASCII):

Image Make (ASCII):

Image Model (ASCII):

Image Orientation (Short): Horizontal (normal)

Image Padding (Undefined): []

Image ResolutionUnit (Short): Pixels/Inch

Image Software (ASCII): Microsoft Windows Photo Viewer 6.1.7600.16385

Image XResolution (Ratio): 72

Image YCbCrPositioning (Short): Co-sited

Image YResolution (Ratio): 72

Thumbnail Compression (Short): JPEG (old-style)

Thumbnail JPEGInterchangeFormat (Long): 4970

Thumbnail JPEGInterchangeFormatLength (Long): 3883

Thumbnail Orientation (Short): Horizontal (normal)

Thumbnail ResolutionUnit (Short): Pixels/Inch

Thumbnail XResolution (Ratio): 72

Thumbnail YCbCrPositioning (Short): Co-sited

Thumbnail YResolution (Ratio): 72

至于Python Exif Parser，好像没更新很久了，使用方法也很类似：

代码如下：

import exif

photo_path = "somePath\to\a\photo.jpg"

data = exif.parse(photo_path)

其他类库请自行研究。