在启用地理标记功能的iPhone上拍摄的EFIX / JPEG照片中存储了哪些信息?

时间:2010-10-14 05:15:30

标签: iphone geotagging

我知道有些数据可以在iPhoto中查看,例如纬度,经度和海拔高度,但是有多少可用吗?更具体地说,我也希望获得图像的方向,这是EXIF格式的一部分。或者是否需要启用除地理标记之外的其他内容(与指南针有关)?

3 个答案:

答案 0 :(得分:5)

我建议安装命令行工具exif。您可以通过以root身份执行port install exif来通过Mac端口获取它。

以下是我在iPod Touch上拍摄的照片中存储的exif信息示例:

bash:$ exif Oct\ 9\,\ 2010/IMG_0038.JPG 
EXIF tags in 'Oct 9, 2010/IMG_0018.JPG' ('Motorola' byte order):
--------------------+----------------------------------------------------------
Tag                 |Value
--------------------+----------------------------------------------------------
Manufacturer        |Apple
Model               |iPod touch
Orientation         |right - top
x-Resolution        |72.00
y-Resolution        |72.00
Resolution Unit     |Inch
Software            |4.1
Date and Time       |2010:10:06 17:43:43
YCbCr Positioning   |centered
Compression         |JPEG compression
x-Resolution        |72.00
y-Resolution        |72.00
Resolution Unit     |Inch
Exposure Time       |1/120 sec.
FNumber             |f/2.4
Exposure Program    |Normal program
ISO Speed Ratings   |320
Exif Version        |Exif Version 2.21
Date and Time (origi|2010:10:06 17:43:43
Date and Time (digit|2010:10:06 17:43:43
Components Configura|Y Cb Cr -
Shutter speed       |6.91 EV (1/120 sec.)
Aperture            |2.53 EV (f/2.4)
Metering Mode       |Average
Flash               |No flash function
Focal Length        |3.9 mm
FlashPixVersion     |FlashPix Version 1.0
Color Space         |sRGB
PixelXDimension     |640
PixelYDimension     |480
Sensing Method      |One-chip color area sensor
Exposure Mode       |Auto exposure
White Balance       |Auto white balance
Scene Capture Type  |Standard
Sharpness           |Normal
North or South Latit|N
Latitude            |44.00, 22.12, 0.00
East or West Longitu|W
Longitude           |56.00, 23.98, 0.00
GPS time (atomic clo|17:43:41.60
--------------------+----------------------------------------------------------
EXIF data contains a thumbnail (10215 bytes).

我不认为iPod Touch具有与iPhone相同的GPS功能。

看起来iPhone也会有数据'GPSImg Direction',这听起来像你想要的。我不认为你必须做任何特别的事情来启用它,因为我没有通过搜索找到很多关于此的信息。

答案 1 :(得分:2)

好的,好消息:)。方向存储在GPS Img Direction中。这是我使用@rwong提到的ExifTool从iphone拍摄的照片(带有定位服务和指南针的照片)中获得的。

ExifTool Version Number         : 8.34
File Name                       : photo.JPG
Directory                       : C:/Documents and Settings/user/My Document
s/Downloads
File Size                       : 349 kB
File Modification Date/Time     : 2010:10:19 14:05:39-06:00
File Permissions                : rw-rw-rw-
File Type                       : JPEG
MIME Type                       : image/jpeg
JFIF Version                    : 1.01
Exif Byte Order                 : Big-endian (Motorola, MM)
Image Description               : Back Camera
Make                            : Apple
Camera Model Name               : iPhone
Orientation                     : Horizontal (normal)
X Resolution                    : 72
Y Resolution                    : 72
Resolution Unit                 : inches
Software                        : 4.0.1
Modify Date                     : 2010:10:19 14:00:52
Y Cb Cr Positioning             : Centered
Exposure Time                   : 1/146
F Number                        : 2.4
Exposure Program                : Program AE
ISO                             : 80
Exif Version                    : 0221
Date/Time Original              : 2010:10:19 14:00:52
Create Date                     : 2010:10:19 14:00:52
Shutter Speed Value             : 1/146
Aperture Value                  : 2.4
Metering Mode                   : Average
Flash                           : Off, Did not fire
Focal Length                    : 3.9 mm
Subject Area                    : 1295 967 699 696
Flashpix Version                : 0100
Color Space                     : sRGB
Exif Image Width                : 1296
Exif Image Height               : 968
Sensing Method                  : One-chip color area
Exposure Mode                   : Auto
White Balance                   : Auto
Scene Capture Type              : Standard
Sharpness                       : Hard
GPS Latitude Ref                : North
GPS Longitude Ref               : West
GPS Time Stamp                  : 14:00:46.81
GPS Img Direction Ref           : True North
GPS Img Direction               : 32.52336904
Image Width                     : 1296
Image Height                    : 968
Encoding Process                : Baseline DCT, Huffman coding
Bits Per Sample                 : 8
Color Components                : 3
Y Cb Cr Sub Sampling            : YCbCr4:2:0 (2 2)
Aperture                        : 2.4
GPS Latitude                    : 45 deg 14' 58.20" N
GPS Longitude                   : 121 deg 39' 4.80" W
GPS Position                    : 45 deg 14' 58.20" N, 121 deg 39' 4.80" W
Image Size                      : 1296x968
Shutter Speed                   : 1/146
Focal Length                    : 3.9 mm
Light Value                     : 10.0

答案 2 :(得分:0)

你不需要'外部'工具来查看所有EXIF信息,使用iPhone-app iMetaPhoto你可以显示所有metainfos(EXIF,TIFF,IPTC,GPS,AUXiliary EXIF,...)和(最好的)你可以修改它们中的大多数,尤其是你可以修改GPS ImgDirection。