Minutiae (Galton Points)
Definition
Local ridge features used for individual identification. The classical set is ridge ending, bifurcation, dot, island or lake, bridge, hook or spur, crossover and trifurcation.
- Also called
- Galton points, after Francis Galton
- Classical set
- Ridge ending, bifurcation, dot, island/lake, bridge, hook/spur, crossover, trifurcation
- Used for
- Individual identification
- Historical origin
- Galton's 1892 study Finger Prints
Common questions
Why are minutiae also called Galton points?+
Francis Galton was among the first to systematically catalogue these ridge characteristics and argue for their use in individual identification in his 1892 book, so his name became attached to the feature set even though later researchers refined and expanded the classification.
Does every examiner or agency use the exact same list of Galton point types?+
The core types such as ending, bifurcation, and dot are near-universal, but some classification schemes group or split minor variants like bridges, spurs, and trifurcations differently, so the exact enumerated list can vary slightly between agencies and textbooks.
How do Galton points relate to the ridge count or pattern type of a print?+
Pattern type, loop, whorl, or arch, is a Level 1 classification used for sorting prints into broad categories, while Galton points are finer Level 2 detail layered on top of that pattern and are what actually drives individualisation between two prints of the same general type.
Related terms
- 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...
- Adermatoglyphia
- Rare genetic disorder, sometimes called immigration delay disease, in which a person is born without friction ridges. The standard counter-example to the...
- Core
- The approximate centre of a fingerprint pattern. In a loop, it is identified as the innermost recurving ridge's peak or the tip...
- Delta
- Triangular ridge formation at the point where parallel ridge flows diverge. Arches have 0 deltas, loops have 1, whorls have 2 or...
- Dermal Papillae
- Peg-like projections of the dermis into the epidermis. Their geometry sets the ridge pattern in stone before birth. Damage limited to the...
- Friction Ridge
- Raised epidermal ridge on the palmar surface of fingers, palms and soles, formed during foetal life from the underlying dermal papillae. The...
- Henry Classification
- Numeric filing system built at the Calcutta Fingerprint Bureau in 1897. Assigns a numerator and denominator from whorls on even and odd...