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Smartphone Medium confidence

SM-A705F

Analysed files
50
Release
2020
Observed span
2020 – 2025

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

GPS Metadata RateThe proportion of files where this device embedded GPS coordinates — from an on-board receiver or a paired smartphone.

Percentage of files from this device that contained GPS location data.

44%

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.

16%

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).

10%

Restart Interval (DRI) RateDefine Restart Interval — a JPEG marker that splits the compressed stream into independently-decodable blocks to aid error recovery. Canon cameras include it consistently; most others do not.

Rate at which this device writes a DRI (Define Restart Interval) marker. Canon cameras consistently include this; most Nikon, Sony, and smartphone output does not.

36%

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

Image resolution values observed for this device.

Observed value
6528x4896
4032x3024
4032x2268

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.

1

distinct fingerprint 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
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.
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.
DHTDefine Huffman Table — the compression lookup table baked in by the encoder.
SOIStart of Image — the 2-byte marker that opens every valid JPEG file.
APP4
EOIEnd of Image — the 2-byte marker that closes every valid JPEG file.
DRIDefine Restart Interval — written by some cameras (notably Canon) to enable mid-file error recovery.
APP0JFIF application marker — identifies the file as JFIF format and may carry thumbnail and pixel density info.
APP5
TRAIL
APP2ICC colour profile or FlashPix extension data.
APP13IPTC data container — used by Photoshop and some cameras for editorial and copyright metadata.

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.
ICC_PROFILE
Photoshop 3.0

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
0220
Exif Version 2.2

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
A705FXXU5DUI3
A705FXXS5DVK6
A705FXXU5DUE2

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

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