Latent Quality Metric (LQMetric) and OpenLQM
Definition
LQMetric is a Noblis-developed tool for the FBI that assesses latent fingerprint image quality. OpenLQM is the open-source C++ port developed under contract to NIST in 2024–2025.
Related terms
- 3D Fingerprint Capture
- Capture of fingerprint surface geometry as three-dimensional data. Enrolment systems and methods for documenting marks on exhibits have distinct requirements; neither should...
- ACE-V
- Analysis, Comparison, Evaluation, Verification: the four-stage method for latent print examination used by accredited forensic fingerprint laboratories. Analysis examines the latent in...
- Amino Acid Racemisation
- Interconversion of amino-acid enantiomers. Experimental fingerprint dating research has investigated D/L-serine using derivatisation and UPLC-MS/MS.
- Blind Verification
- The procedure in which a second fingerprint examiner independently performs the Analysis and Comparison stages without knowledge of the first examiner's conclusion....
- MALDI-MSI
- Matrix-assisted laser desorption/ionisation mass spectrometry imaging maps chemical signals across a surface using an applied matrix and laser. It has been studied...
- Micro-Computed Tomography (Micro-CT)
- High-resolution X-ray tomography producing volumetric images. Research includes imaging postmortem friction-ridge structures; this does not establish routine recovery of latent prints from...
- Squalene
- A polyunsaturated hydrocarbon abundant in sebaceous fingerprint secretions that oxidises over time; the ratio of squalene to its oxidation products is a...
- Structured-Light Projection
- A 3D imaging method in which the deformation of a projected light pattern allows calibrated cameras to estimate surface geometry.
- ULTR (Uniform Language for Testimony and Reports)
- US Department of Justice language requirements for examiner reports and testimony. The latent-print ULTR effective 15 August 2020 prohibits claims including infallibility,...