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Device Medium confidence

Canon MF3010

Release
2021
Observed span
2021

All patterns are aggregated and anonymous — no originals retained. Privacy details →

Embedded ThumbnailA small JPEG preview stored inside the EXIF APP1 segment, written at capture. May differ from the full image if the file was post-processed.

Rate at which this device embeds a thumbnail in the EXIF APP1 segment.

89.5%

Output DimensionsImage resolution values (width × height in pixels) observed across analysed files from this device.

Image resolution values observed for this device.

Observed value
2480x3508
4677x3307

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

DQT Quantisation Table FingerprintsThe 64-value matrix that controls JPEG lossy compression. Baked into firmware — consistent across units of the same model — and distinctive enough to act as a camera fingerprint.

JPEG quantisation table fingerprints. Identical patterns across devices indicate shared hardware or firmware lineage.

2

distinct fingerprints accumulated

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
SOIStart of Image — the 2-byte marker that opens every valid JPEG file.
APP0JFIF application marker — identifies the file as JFIF format and may carry thumbnail and pixel density info.
APP1Primary metadata container — holds EXIF camera data (make, model, GPS, settings) and optionally XMP.
DQTDefine Quantization Table — the 64-value lossy compression matrix. Consistent per firmware; useful as a fingerprint.
SOF0Start of Frame, Baseline DCT — the most common JPEG compression type.
SOSStart of Scan — marks the beginning of the compressed image data stream.
DHTDefine Huffman Table — the compression lookup table baked in by the encoder.

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
JFIFJPEG File Interchange Format — a baseline format header. Often absent from camera-original files; common in scanned or web-converted images.
XMPExtensible Metadata Platform — Adobe's XML-based metadata layer for editing history, rights, and additional descriptive data.

EXIF VersionThe EXIF specification version string written by the device's firmware. Not user-adjustable — a firmware constant that can indicate manufacturing era.

EXIF specification version string encoded by this device's firmware. Not user-adjustable — firmware constant.

Observed value
02

Software / Firmware StringsValues written to the EXIF Software tag — may reflect firmware version, in-camera processing software, or the desktop application used to export the file.

Values written to the EXIF Software tag by this device or its associated software.

Observed value
MF Toolbox 4.9.1.1
Microsoft Windows Photo Viewer 6.3.9600.17415

Y/CbCr PositioningSpecifies how chroma channels (Cb, Cr) align with the luma channel (Y) during colour subsampling. Centred (1) or co-sited (2) — a firmware preference. Canon typically writes 2; Nikon and Sony write 1.

Colour channel alignment encoded by this device (1 = centred, 2 = co-sited). Manufacturer-determined — Canon typically writes 2, Nikon and Sony write 1.

Observed value
1

XMP NamespacesXML namespace URIs present in XMP metadata from this device. The set of namespaces reveals which software pipeline created or processed the file.

XMP namespace URIs present in output from this device.

Observed value
rdf,x,xmp

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