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本文是利用Python脚本读取图片信息，有几个说明如下：
1、没有实现错误处理
2、没有读取所有信息，大概只有 GPS 信息、图片分辨率、图片像素、设备商、拍摄设备等
3、简单修改后应该能实现暴力修改图片的 GPS 信息
4、但对于本身没有 GPS 信息的图片，实现则非常复杂，需要仔细计算每个描述符的偏移量
脚本运行后，读取结果如下
脚本读取的信息
这里和 Windows 属性查看器读到的内容完全一致
图片信息1
图片信息2
源码如下
? 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269# -*- coding:utf-8 -*-
import binascii
class ParseMethod(object):
@staticmethod
def parse_default(f, count, offset):
pass
@staticmethod
def parse_latitude(f, count, offset):
old_pos = f.tell()
f.seek(12 + offset)
latitude = [0,0,0]
for i in xrange(count):
byte = f.read(4)
numerator = byte.encode('hex')
byte = f.read(4)
denominator = byte.encode('hex')
latitude[i] = float(int(numerator, 16)) / int(denominator, 16)
print 'Latitude:t%.2f %.2f' %.2f"' % (latitude[0], latitude[1], latitude[2])
f.seek(old_pos)
@staticmethod
def parse_longtitude(f, count, offset):
old_pos = f.tell()
f.seek(12 + offset)
longtitude = [0,0,0]
for i in xrange(count):
byte = f.read(4)
numerator = byte.encode('hex')
byte = f.read(4)
denominator = byte.encode('hex')
longtitude[i] = float(int(numerator, 16)) / int(denominator, 16)
print 'Longtitude:t%.2f %.2f' %.2f"' % (longtitude[0], longtitude[1], longtitude[2])
f.seek(old_pos)
@staticmethod
def parse_make(f, count, offset):
old_pos = f.tell()
f.seek(12 + offset)
byte = f.read(count)
a = byte.encode('hex')
print 'Make:tt' + binascii.a2b_hex(a)
f.seek(old_pos)
@staticmethod
def parse_model(f, count, offset):
old_pos = f.tell()
f.seek(12 + offset)
byte = f.read(count)
a = byte.encode('hex')
print 'Model:tt' + binascii.a2b_hex(a)
f.seek(old_pos)
@staticmethod
def parse_datetime(f, count, offset):
old_pos = f.tell()
f.seek(12 + offset)
byte = f.read(count)
a = byte.encode('hex')
print 'DateTime:t' + binascii.a2b_hex(a)
f.seek(old_pos)
# rational data type, 05
@staticmethod
def parse_xresolution(f, count, offset):
old_pos = f.tell()
f.seek(12 + offset)
byte = f.read(4)
numerator = byte.encode('hex')
byte = f.read(4)
denominator = byte.encode('hex')
xre = int(numerator, 16) / int(denominator, 16)
print 'XResolution:t' + str(xre) + ' dpi'
f.seek(old_pos)
@staticmethod
def parse_yresolution(f, count, offset):
old_pos = f.tell()
f.seek(12 + offset)
byte = f.read(4)
numerator = byte.encode('hex')
byte = f.read(4)
denominator = byte.encode('hex')
xre = int(numerator, 16) / int(denominator, 16)
print 'YResolution:t' + str(xre) + ' dpi'
f.seek(old_pos)
@staticmethod
def parse_exif_ifd(f, count, offset):
old_pos = f.tell()
f.seek(12 + offset)
byte = f.read(2)
a = byte.encode('hex')
exif_ifd_number = int(a, 16)
for i in xrange(exif_ifd_number):
byte = f.read(2)
tag_id = byte.encode('hex')
#print tag_id,
byte = f.read(2)
type_n = byte.encode('hex')
#print type_n,
byte = f.read(4)
count = byte.encode('hex')
#print count,
byte = f.read(4)
value_offset = byte.encode('hex')
#print value_offset
value_offset = int(value_offset, 16)
EXIF_IFD_DICT.get(tag_id, ParseMethod.parse_default)(f, count, value_offset)
f.seek(old_pos)
@staticmethod
def parse_x_pixel(f, count, value):
print 'X Pixels:t' + str(value)
@staticmethod
def parse_y_pixel(f, count, value):
print 'y Pixels:t' + str(value)
@staticmethod
def parse_gps_ifd(f, count, offset):
old_pos = f.tell()
f.seek(12 + offset)
byte = f.read(2)
a = byte.encode('hex')
gps_ifd_number = int(a, 16)
for i in xrange(gps_ifd_number):
byte = f.read(2)
tag_id = byte.encode('hex')
#print tag_id,
byte = f.read(2)
type_n = byte.encode('hex')
#print type_n,
byte = f.read(4)
count = byte.encode('hex')
#print count,
byte = f.read(4)
value_offset = byte.encode('hex')
#print value_offset
count = int(count, 16)
value_offset = int(value_offset, 16)
GPS_IFD_DICT.get(tag_id, ParseMethod.parse_default)(f, count, value_offset)
f.seek(old_pos)
IFD_dict = {
'010f' : ParseMethod.parse_make ,
'0110' : ParseMethod.parse_model ,
'0132' : ParseMethod.parse_datetime ,
'011a' : ParseMethod.parse_xresolution ,
'011b' : ParseMethod.parse_yresolution ,
'8769' : ParseMethod.parse_exif_ifd ,
'8825' : ParseMethod.parse_gps_ifd
}
EXIF_IFD_DICT = {
'a002' : ParseMethod.parse_x_pixel ,
'a003' : ParseMethod.parse_y_pixel
}
GPS_IFD_DICT = {
'0002' : ParseMethod.parse_latitude ,
'0004' : ParseMethod.parse_longtitude
}
with open('image.jpg', 'rb') as f:
byte = f.read(2)
a = byte.encode('hex')
print 'SOI Marker:t' + a
byte = f.read(2)
a = byte.encode('hex')
print 'APP1 Marker:t' + a
byte = f.read(2)
a = byte.encode('hex')
print 'APP1 Length:t' + str(int(a, 16)) + ' .Dec'
byte = f.read(4)
a = byte.encode('hex')
print 'Identifier:t' + binascii.a2b_hex(a)
byte = f.read(2)
a = byte.encode('hex')
print 'Pad:tt' + a
print
print 'Begin to print Header.... '
print 'APP1 Body: '
byte = f.read(2)
a = byte.encode('hex')
print 'Byte Order:t' + a
byte = f.read(2)
a = byte.encode('hex')
print '42:tt' + a
byte = f.read(4)
a = byte.encode('hex')
print '0th IFD Offset:t' + a
print 'Finish print Header'
print 'Begin to print 0th IFD....'
print
#print 'Total: ',
byte = f.read(2)
a = byte.encode('hex')
interoperability_number = int(a, 16)
#print interoperability_number
for i in xrange(interoperability_number):
byte = f.read(2)
tag_id = byte.encode('hex')
#print tag_id,
byte = f.read(2)
type_n = byte.encode('hex')
#print type_n,
byte = f.read(4)
count = byte.encode('hex')
#print count,
byte = f.read(4)
value_offset = byte.encode('hex')
#print value_offset
count = int(count, 16)
value_offset = int(value_offset, 16)
# simulate switch
IFD_dict.get(tag_id, ParseMethod.parse_default)(f, count, value_offset)
print
print 'Finish print 0th IFD....'
总结
利用Python读取图片属性信息的实现方法到这就基本结束了，大家都学会了吗？希望这篇文章对大家的学习或者工作带来一定的帮助，
