在启用了地理标记的 iPhone 上拍摄的 EFIX/JPEG 照片中存储了哪些信息?

发布于 2024-09-28 02:14:40 字数 117 浏览 1 评论 0原文

我知道其中一些数据可以在 iPhoto 中查看,例如纬度、经度和海拔高度,但是还有更多可用的数据吗?更具体地说,我还想获取图像的方向,这是 EXIF 格式的一部分。或者是否需要启用地理标记以外的其他功能(与指南针有关)?

I know that some of this data is viewable in iPhoto, such as latitude, longitude, and altitude, but is there more than this available? More specifically I am wanting to get the direction of the image as well, which is part of the EXIF format. Or does something other than geotagging need to be enabled (something to do with the compass)?

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负佳期 2024-10-05 02:14:40

我建议安装命令行工具exif。您可以通过 Mac Ports 以 root 身份执行 port install exif 来获取它。

以下是我在 iPod Touch 上拍摄的照片中存储的 exif 信息的示例:

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 在 GPS 方面具有与 iPhone 相同的功能。

看起来 iPhone 也会有数据“GPSImg Direction”,这听起来像你想要的。我认为你不需要做任何特殊的事情来启用它,因为我没有通过搜索找到太多关于这方面的信息。

I suggest installing the command line tool exif. You can get it through Mac Ports by executing port install exif as root.

Here's an example of the exif info stored in a photo I took on an iPod Touch:

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).

I don't think the iPod Touch has the same capabilities as an iPhone regarding GPS.

It looks like an iPhone will have the data 'GPSImg Direction' as well, which sounds like what you want. I don't think you have to do anything special to enable it, as I haven't found much info on this through searching.

老街孤人 2024-10-05 02:14:40

好的,好消息:)。方向存储在GPS Img Direction中。以下是我使用 @rwong 提到的 ExifTool 从 iPhone(打开定位服务和指南针)拍摄的照片中获得的结果。

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

Okay, good news :). The direction is stored in GPS Img Direction. Here's what I was able to get from a photo taken from an iphone (with location services and compass turned on) using the ExifTool mentioned by @rwong.

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
自找没趣 2024-10-05 02:14:40

您不需要“外部”工具来查看所有 EXIF 信息,使用 iPhone 应用程序 iMetaPhoto 您可以显示所有元信息(EXIF、TIFF、IPTC、GPS、AUXiliary EXIF...)以及(最好的) all)您可以修改其中的大部分,尤其是。您可以修改 GPS ImgDirection。

you don't need an 'external' tool to view all the EXIF-infos, with the iPhone-app iMetaPhoto you can show all metainfos (EXIF, TIFF, IPTC, GPS, AUXiliary EXIF,...) and (the best of all) you can modify the most of them, esp. you can modify GPS ImgDirection.

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