Tenprint Fingerprint Certification Tenprint Fingerprint Quality Standards & Control 1 — Questions and Answers
Question 1: What is the minimum image resolution recommended by the FBI for tenprint fingerprint scans?
- 300 ppi
- 500 ppi (Correct answer)
- 750 ppi
- 1000 ppi
Correct answer: 500 ppi
The FBI requires a minimum of 500 pixels per inch (ppi) for tenprint fingerprint scans to ensure sufficient detail for comparison.
Question 2: Which FBI standard governs the quality requirements for electronic fingerprint submissions?
- CJIS Security Policy
- EBTS (Electronic Biometric Transmission Specification) (Correct answer)
- NIST SP 800-76
- DOJ Order 2610.2A
Correct answer: EBTS (Electronic Biometric Transmission Specification)
The Electronic Biometric Transmission Specification (EBTS) sets the technical requirements for electronic fingerprint submissions to the FBI.
Question 3: What is the NFIQ (NIST Fingerprint Image Quality) scale range?
- 0–100 (higher is better)
- 1–5 (lower is better) (Correct answer)
- 1–10 (higher is better)
- 0–255 (based on pixel density)
Correct answer: 1–5 (lower is better)
NFIQ rates fingerprint image quality on a scale of 1–5, where 1 is the highest quality and 5 is the poorest quality.
Question 4: What term describes a fingerprint impression that is too light due to insufficient ink or pressure?
- Overrolled
- Underrolled
- Smudged
- Thin impression (Correct answer)
Correct answer: Thin impression
A thin impression results from insufficient ink or pressure, causing ridge detail to appear light and poorly defined.
Question 5: What quality defect occurs when too much ink causes ridges to fill in and appear fused together?
- Thin impression
- Heavy impression (Correct answer)
- Slippage
- Rolled-out impression
Correct answer: Heavy impression
A heavy impression results from excessive ink, causing ridges to spread and fill valleys, obscuring individual ridge detail.
Question 6: According to FBI standards, what gray-scale bit depth is required for tenprint fingerprint images?
- 4-bit (16 shades)
- 8-bit (256 shades) (Correct answer)
- 16-bit (65,536 shades)
- 24-bit (color)
Correct answer: 8-bit (256 shades)
FBI standards require 8-bit grayscale images, providing 256 shades of gray sufficient for ridge detail capture.
Tenprint Fingerprint Certification Tenprint Fingerprint Quality Standards & Control 1
What is the minimum image resolution recommended by the FBI for tenprint fingerprint scans?