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Questions and Answers
What is an arch fingerprint?
What is an arch fingerprint?
- A fingerprint with multiple whorls.
- A fingerprint pattern that loops around.
- A fingerprint pattern that has deltas and cores.
- A class of fingerprint pattern with ridges entering from one side, rising in the center. (correct)
What distinguishes a tented arch fingerprint?
What distinguishes a tented arch fingerprint?
It has a little tent shape at the center.
Which direction does a radial loop open?
Which direction does a radial loop open?
- Upward.
- Both directions.
- Toward the pinky.
- Toward the thumb. (correct)
What defines a whorl fingerprint?
What defines a whorl fingerprint?
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Describe a plain whorl fingerprint.
Describe a plain whorl fingerprint.
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What is an accidental whorl fingerprint?
What is an accidental whorl fingerprint?
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What does a fork (bifurcation) minutiae look like?
What does a fork (bifurcation) minutiae look like?
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What is a core in fingerprint terminology?
What is a core in fingerprint terminology?
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Study Notes
Fingerprint Classifications
- Arch Fingerprint: Ridges enter from one side, rise in the center, and exit on the other side; lacks deltas and cores.
- Plain Arch Fingerprint: No detailed definition provided; characterized by simple upward ridges without tent-like formation.
- Tented Arch Fingerprint: Variation of the plain arch; features a lifted center resembling a pitched tent shape.
Loop Fingerprints
- Loop Fingerprint: Ridges start at one side, curve upwards, and exit the opposite side; includes one core and one delta.
- Radial Loop: Loops open towards the thumb, an important distinction in fingerprint analysis.
- Ulnar Loop: Loops open towards the pinky finger, indicating the direction of the curve.
Whorl Fingerprints
- Whorl Fingerprint: Contains a central circle with ridges encircling it; requires at least one core and two deltas.
- Plain Whorl: Two deltas present, with a line drawn between them intersecting the central pocket.
- Central Pocket Whorl: One or more free recurving ridges and two delta points; does not bisect core group ridges.
- Accidental Whorl: Combination of multiple fingerprint patterns; cannot fit any single classification.
- Double Loop Whorl: Characterized by two deltas with ridge lines that curve around each other in an S shape.
Minutiae Features
- Ending Ridge: A simple, straight ridge line.
- Fork (Bifurcation) Minutiae: Occurs when a ridge separates into two distinct lines.
- Dot Minutiae: Defined as a small round mark or spot on the ridge.
- Bridge Minutiae: Connection between two ridge lines.
- Hook Minutiae: A ridge that curves and ends from another ridge.
- Eye Minutiae: Features one ridge line diverging into two and then reconnecting.
- Double Fork Minutiae: Resembles a two-pronged fork with an additional prong extending from one of the prongs.
- Delta Minutiae: A bifurcation with a dot located in its center.
- Core: The central point of a loop or whorl fingerprint pattern.
- Triple Fork Minutiae: A unique three-pronged fork-like appearance in ridge patterns.
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