With just one picture, how can you find the location and time of capture without leaving your home? In fact, every time you take a photo, your phone or camera saves an image file (usually JPEG) on the device. This file not only contains all the visible pixels but also includes a wealth of image EXIF metadata.
What is EXIF Data
EXIF stands for Exchangeable Image File Format, which is a metadata format used for embedding information in digital images. EXIF data records the shooting information and related technical data of a photo. The following table shows some of the EXIF information.
|Model||Camera model||iPhone 11|
|ExposureProgram||Exposure program||Normal program|
|Flash||Flash status||Flash did not fire，compulsory flash mode|
|FocalLength||Focal length||4.25 mm|
|ExposureMode||Exposure mode||Auto exposure|
|LensModel||Lens model||iPhone 11 back dual wide camera 4.25mm f/1.8|
These pieces of information provide detailed data about the shooting device, exposure settings, and lens information. For photography enthusiasts and professional photographers, they are valuable for understanding the shooting conditions and technical parameters of a photo.
However, some EXIF data may also contain privacy information that you may not want to expose, such as GPS-related information at the time of shooting. The following table shows some of the GPS information that can be obtained from EXIF.
|GPS Info IFD Pointer||Pointer position for GPS information storage||2090|
|GPSAltitude||Altitude value||0.432788587534304 m|
|GPSImgDirection||Image direction value||129.419281|
|GPSDestBearing||Destination bearing value||129.419281|
|GPSHPositioningError||Horizontal positioning error||5.026539358|
How to Obtain EXIF Data
With the popularity of mobile devices and the continuous evolution of GPS technology, location services have become more accurate. Most smartphones record GPS coordinates when taking photos. Therefore, if you upload photos with metadata to social media or send them by e-mail, although there is usually no problem, malicious people can collect a lot of detailed information from them. Earlier, an article titled "How I Reasoned out Wang Luodan's Address" became popular on the internet, and the author used photos of Wang Luodan on social network platform to reason out his address information in just 40 minutes. Today, with an EXIF extraction tool, one can obtain this information quickly, even deduce the height of the building based on the height information.
You can use the exif-cli command-line tool to extract EXIF information:
you need to install Node.js, which can be downloaded and installed from the Node.js website.
Install exif-cli globally by the following command:
npm install -g exif-cli
- Change the directory to the location of the target image and enter the following command in the terminal after opening it:
The final result is as follows:
PS C:\Users\rance\Pictures> exif example.jpg image Make: Apple Model: iPhone 11 Orientation: 1 XResolution: 72 YResolution: 72 ResolutionUnit: 2 Software: 16.3.1 ModifyDate: 2023:05:01 18:41:33 HostComputer: iPhone 11 ExifOffset: 216 GPSInfo: 2090 exif ExposureTime: 0.016666666666666666 FNumber: 1.8 ExposureProgram: 2 ISO: 160 ExifVersion: 0232 DateTimeOriginal: 2023:05:01 18:41:33 CreateDate: 2023:05:01 18:41:33 ShutterSpeedValue: 5.915630896403007 ApertureValue: 1.6959938128383605 BrightnessValue: 3.0061857632280167 ExposureCompensation: 0 MeteringMode: 3 Flash: 16 FocalLength: 4.25 SubjectArea: 2559,2283,740,775 SubSecTimeOriginal: 676 SubSecTimeDigitized: 676 ColorSpace: 65535 ExifImageWidth: 4032 ExifImageHeight: 3024 SensingMethod: 2 SceneType: ExposureMode: 0 WhiteBalance: 0 DigitalZoomRatio: 1.9947229551451187 FocalLengthIn35mmFormat: 52 LensInfo: 1.5399999618512084,4.25,1.8,2.4 LensMake: Apple LensModel: iPhone 11 back dual wide camera 4.25mm f/1.8 gps GPSLatitudeRef: N GPSLatitude: 14,21,25.79 GPSLongitudeRef: E GPSLongitude: 100,33,55.19 GPSAltitudeRef: 1 GPSAltitude: 0.43278858753430416 GPSSpeedRef: K GPSSpeed: 0.06676206737914926 GPSImgDirectionRef: T GPSImgDirection: 129.41928104575163 GPSDestBearingRef: T GPSDestBearing: 129.41928104575163 GPSDateStamp: 2023:05:01 GPSHPositioningError: 5.026539357943012
Although exif-cli can obtain exif data, it is cumbersome to use, requires configuration of related dependencies, and lacks an easy-to-interact UI interface. To solve this problem, He3 provides a visual EXIF extraction tool.
He3's EXIF extraction tool not only extracts EXIF information but also categorizes data on different focal points. Perhaps you want to uncover the magical secrets behind these stunning photos and explore how they were born. Maybe you are eager to know the exact location of those picturesque places so you can visit them in person, and He3's EXIF extraction tool is just what you need! Whether it's shooting time, camera model, or exposure parameters, this built-in tool in He3 can present them all for you.
Experience He3's image EXIF extraction tool now: https://t.he3app.com/fns5
How to clear EXIF information
It should be noted that since EXIF data is embedded in image files, it may pose privacy and security risks. For example, when sharing photos on social media or online, location information in EXIF data can reveal a person's actual location. Therefore, we need to be cautious when sharing photos with EXIF data and make appropriate processing and deletion when necessary. In fact, EXIF data can be considered as "redundant information" of the image, and removing it will not affect the actual pixels of the image. After testing, He3's image EXIF extractor tool can remove sensitive information in the image, thus protecting your privacy.
After removing the EXIF information from the sample image, it can be seen that the information has been cleared when inputting it back into the EXIF extractor.
Try it yourself
Perhaps you are not satisfied with being an observer. In He3's tool library, there is also a lightweight EXIF editor for you to make simple edits to EXIF information.
In fact, editing EXIF information often requires a lot of professional knowledge to ensure the correctness of EXIF format. For example, the format of storing EXIF in images taken with Android and iOS systems is different, and the format of storing EXIF in images on different devices under the same system is also different. Therefore, we have retained as many popular focal points as possible for you to edit.
Experience He3's image EXIF editor tool now: https://t.he3app.com/2m3r
Perhaps you want to ask
- Can the shooting location of the photo be found? It can be found, but the prerequisite is that the image has GPS location data. Upload it to He3, and you'll know. If you turn off GPS positioning in your phone settings, the photo will not contain GPS data.
- Is EXIF data guaranteed to be true? Not necessarily, as there are currently multiple ways to modify photo metadata. It is impossible to ensure that you are viewing the original image metadata or metadata that has been edited by someone else.
- Is it safe to upload images to He3? He3 will not engage in any privacy-infringing behavior. For example, in He3's image EXIF extraction tool, the images you upload will not be stored and are only used for extracting and visualizing metadata.
- Is there a charge? This tool is provided completely free of charge. In addition, He3 also provides more than 400 other free tools for you to use.
Feel free to download the latest version of the He3 client or update your version to 1.3.7 and experience it. Use He3 to unleash your modern development potential. Official website: https://he3.app/
f you have any ideas or suggestions on how we can use our tools to improve your work efficiency, feel free to raise issues and discuss with us: https://github.com/he3-app/he3-feedback/issues
Top comments (0)