Thumbnails

Thumbnails are reduced-size versions of pictures, serving the same role for images as a normal text index does for words.

Windows

See Thumbs.db.

Windows Vista

Thumbs.db no longer exists in Vista. This data has been moved to \Users\\AppData\Local\Microsoft\Windows\Explorer

KDE & GNOME

KDE and GNOME are popular desktop environments for Linux and UNIX platforms. They are storing thumbnails in ~/.thumbnails.

Example thumbnail in GNOME:

$ hachoir-metadata .thumbnails/normal/0d97afdc637ac86d75d13e72172dc77c.png
Metadata:
- Image width: 128 pixels
- Image height: 122 pixels
- Bits/pixel: 24
- Pixel format: RGB
- Compression rate: 1.6x
- Compression: deflate
- Producer: GNOME::ThumbnailFactory
- Comment: Thumb::Image::Width=779
- Comment: Thumb::Image::Height=744
- Comment: Thumb::URI=file:///media/truecrypt1/123.jpg
- Comment: Thumb::MTime=1216153400
- MIME type: image/png
- Endian: Big endian