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List of relevant norms for the forensic identification of sound images (for example, video imagery)

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1. GA/T 1023-2013 Technical Instructions for Video Human Image Testing

  • Scope of application(c) Audio-visual identification in the scientific field of the Tribunal, which is specific to the testing and matching of the physical features of the person in the video.
  • Core content:

    • Human characterization classificationThese include anatomy features (five official forms, head profiles), dynamic features (steps, gestures), special markings (scarbs, tattoos), dress features, etc.
    • Test Steps:

      1. Sample versus test: Identification of homogeneity by comparing the target with the dynamic/static characteristics of the sample.
      2. Key frame extraction: Select the frame of the video that clearly reflects the characteristics of the human image for static analysis.
      3. Technical instrumentsAcoustic analysis, image enhancement techniques (e.g., noise reduction, clarity processing).
    • Type of determinationThree types of conclusion: certainty, uncertainty, absence of test.

2. GA/T 1020-2013 Technical Guidelines for the Testing of Incident Processes in Video

  • Scope of applicationVideo-recorded event process analysis, such as movement trajectory, environmental change, etc.
  • Core requirements:

    • Content Check: a frame-by-frame analysis of humans, objects, state of environment (e.g. location, quantity, actions).
    • Case testTimeline for dynamic analysis of events, logical relationships (e.g. vehicle path, person interaction sequence).
    • Technology dependency• Need to combine normative judgements such as GA/T 1018 (object image inspection), GA/T 1019 (vehicle image inspection).

3. GA/T 1018-2013 Technical Instructions for Image Testing of Objects in Video

  • Focus orientation: Identification of the shape, characteristics and location of the object in the video.
  • Apply scene: e.g. theft identification, traffic accident dissipation analysis.

4. GA/T 1019-2013 Technical Instructions for Video Vehicle Image Testing

  • Key elements:

    • Vehicle characterization ( plates, model, colour).
    • Activity trajectory analysis (speed, direction, collision process).

5. SF/T 0119-2021 General Guidelines for the Validation of Audio Materials

  • Comprehensive standards: Covers the capture, storage and processing of audio-visual evidence for full process requirements [citation: user original].
  • Links to video identification:

    • Emphasis is placed on the originality of the evidence (if no self-copying storage medium).
    • The accreditation body must possess the qualifications approved by the provincial judicial administration.

Practical recommendations

  1. Normative Reference PriorityPriority is given to the latest version of the standards (e.g. the SF/T series updated in 2021).
  2. Multi-dimensional IdentificationComplex cases need to be cross-checked in the context of multiple norms, such as images, objects, incident processes (e.g. by targeting suspects through GA/T 1023, then by GA/T 1020.

Interactive questions

  • What part of the regulation do you think the accreditation body will operate on if the surveillance video is vague?
  • Do you know what standards are used in vehicle trajectories analysis in traffic accident identification? The answer is in the text. Try to find it!