Device
Low confidence
Canon EOS-1D Mark IV
Release
2010
Observed span
2010 – 2024
All patterns are aggregated and anonymous — no originals retained. Privacy details →
IPTC Metadata RateInternational Press Telecommunications Council — an editorial metadata standard for captions, copyright, and keywords. Usually added by software rather than written by cameras at capture.
Percentage of files that included IPTC metadata (typically editorial or copyright data).
APP14 SegmentAdobe colour transform marker — a JPEG segment storing a single byte that tells decoders how to interpret YCbCr colour channels when converting to RGB.
APP14 (Adobe color transform marker) presence rate.
SOF Compression TypeStart of Frame marker — identifies the JPEG compression algorithm. SOF0 = baseline DCT (most common); SOF2 = progressive DCT (multiple passes, common in web-optimised images).
JPEG compression markers (SOF0 = baseline, SOF2 = progressive).
| Observed value | |
|---|---|
| SOF0 |
JPEG Segment InventoryThe set of JPEG markers consistently present in output from this device. Marker presence and order are firmware-determined and can help distinguish camera lineages.
APP and SOF segments consistently present in output from this device.
| Observed value | |
|---|---|
| SOSStart of Scan — marks the beginning of the compressed image data stream. | |
| APP1Primary metadata container — holds EXIF camera data (make, model, GPS, settings) and optionally XMP. | |
| DHTDefine Huffman Table — the compression lookup table baked in by the encoder. | |
| DQTDefine Quantization Table — the 64-value lossy compression matrix. Consistent per firmware; useful as a fingerprint. | |
| APP13IPTC data container — used by Photoshop and some cameras for editorial and copyright metadata. | |
| SOF0Start of Frame, Baseline DCT — the most common JPEG compression type. | |
| SOIStart of Image — the 2-byte marker that opens every valid JPEG file. | |
| APP2ICC colour profile or FlashPix extension data. | |
| APP14Adobe colour transform marker — stores a byte indicating how YCbCr channels map to RGB during decoding. |
Metadata Block TypesThe metadata container formats found in files from this device — EXIF, IPTC, XMP, JFIF, and others. Different devices and software pipelines embed different combinations.
| Observed value | |
|---|---|
| Exif | |
| Photoshop 3.0 | |
| IPTCInternational Press Telecommunications Council — editorial metadata: captions, copyright notices, keywords. | |
| Adobe | |
| ICC_PROFILE | |
| XMPExtensible Metadata Platform — Adobe's XML-based metadata layer for editing history, rights, and additional descriptive data. |
Your photos carry this device fingerprint.
Vaultify strips device metadata before sharing — and can hide a private message inside your photo, invisible to forensic scanners like these.
