Metadata
Metadata (Image Descriptive Data)
Image metadata is information embedded within an image file that describes its properties, origin, and content. This includes EXIF camera data, IPTC editorial information, XMP descriptive tags, and ICC color profiles.
التفاصيل التقنية
JPEG files store metadata in APP marker segments: APP1 for EXIF/XMP, APP2 for ICC profiles, APP13 for IPTC. Metadata can significantly increase file size and may contain sensitive information like GPS coordinates.
مثال
```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)
```
أدوات ذات صلة
C
Compress Image
R
Resize Image
C
Crop Image
R
Rotate Image
F
Flip Image
C
Convert Image
W
Watermark Image
S
SVG to PNG
I
Image to Base64
R
Round Corners
A
Add Border
I
Image Filters
A
Adjust Image
B
Blur Image
S
Sharpen Image
M
Make Square
G
Grayscale Image
S
Sepia Image
P
Pixelate Image
S
Strip Image Metadata