EXIF

EXIF (Exchangeable Image File Format)

EXIF is a metadata standard embedded in JPEG, TIFF, and RAW files that records camera settings and shooting conditions. It stores data like shutter speed, aperture, ISO, GPS location, date, camera model, and lens information.

Техническая деталь

EXIF data is stored as tagged key-value pairs in the APP1 marker segment of JPEG files. The specification defines over 100 standard tags across IFD0 (image), Exif IFD (camera), and GPS IFD (location) directories.

Пример

```javascript
// Read EXIF data from image file
const buffer = await file.arrayBuffer();
const view = new DataView(buffer);

// Check JPEG SOI marker
if (view.getUint16(0) === 0xFFD8) {
  // EXIF starts at APP1 marker (0xFFE1)
  // Fields: camera model, aperture, ISO, GPS coords
}

// Strip EXIF: re-draw on canvas → export (removes metadata)
```

Связанные форматы

.iso .jpeg .raw .tiff

Связанные инструменты

Связанные термины

Alpha Channel Bit Depth Chroma Subsampling AVIF Alpha Compositing Batch Resize Aspect Ratio Canvas