EXIF （Exchangeable Image File Format) is the “electronic identity card” for digital photographs. Whenever you press the fast door, the camera or mobile phone is embedded in the image file with a large amount of metadata about the environment, hardware settings and even geographic locations. Understanding these data not only helps photographers to reset technology, but also makes ordinary users more aware of the potential risks of privacy disclosure.
“Growth log” for photographers
By looking at EXIF information for a good photo, you can get a precise picture of:
- Three factors of exposure: Quick door speed, optical size (F-Number) and sense (ISO). This is the most visual teaching material for learning exposure control.
- Secrets: The specific lens, the focal area in which the film was taken, and whether the flashlight was activated.
- Post-specific space: View the colour space (Color Space) and white balance settings for the original picture and the modulation potential.
2. Privacy warning: careful photograph disclosure of your location
Modern smartphones are automatically activated when they are taken. GPS Records 。 EXIF The coordinates of longitudes contained in the information can be precise within a few metres. If you share your original drawings directly on social platforms or forums, you can easily obtain your home address or workplace through this tool. It's recommended to use it before sharing sensitive photos. Thousands of cells to check or strip away GPS information.
Why are our viewers safer?
There are many online viewings on the market. EXIF's website will upload your pictures to the back server for analysis. This is extremely dangerous when dealing with pictures containing faces or sensitive information. Thousands The EXIF viewer is running completely on
Client-Side (client)
。 We're through.
ArrayBuffer
and
DataView
Parsing binary bytes directly in your browser memory. Photo data never passed through the network, and it's actually 100%. Privacy protection.
4. Common issues (FAQ)
Q: Why do some pictures have no EXIF information?
Response: There may be two reasons: one is that the picture was ticked to "strike metadata" when exported; Second, some social platforms (such as Twitter, Twitter) automatically compress and erase all of them when they transmit. EXIF Information to protect privacy.
Q: Support RAW formats (e. g. .CR2, .NEF)?
Response: Currently, there is mainly support for JPEG, JPG and TIFF formats. RAW The format is very complex and varied, and we are developing more comprehensive compatibility programmes.