Podcast
Questions and Answers
What is the effect of using disinfectant gel on a dry finger?
What is the effect of using disinfectant gel on a dry finger?
- It has no effect on skin hydration.
- It enhances the grip of the finger.
- It keeps the skin moisturized indefinitely.
- It initially moisturizes but eventually dries the skin. (correct)
Which method is recommended for drying the skin on a finger?
Which method is recommended for drying the skin on a finger?
- Rubbing the finger into the palm or against another finger. (correct)
- Waving the hand in the air to let it dry.
- Using a commercial hand-drying product.
- Rubbing it against a hard surface.
What should be avoided when cleaning the sensor surface?
What should be avoided when cleaning the sensor surface?
- Wiping across the sensor with a solvent. (correct)
- Using a soft moist cloth.
- Cleaning with a dry cloth.
- Spraying liquids directly onto the surface. (correct)
What score range does the FxISO SDK use to evaluate fingerprint quality?
What score range does the FxISO SDK use to evaluate fingerprint quality?
What should be done with low quality fingerprint scores according to the guidelines?
What should be done with low quality fingerprint scores according to the guidelines?
Which fingers are typically recommended for fingerprint verification to achieve better results?
Which fingers are typically recommended for fingerprint verification to achieve better results?
What should be done if a finger is positioned incorrectly on the sensor?
What should be done if a finger is positioned incorrectly on the sensor?
How should the finger be positioned on the sensor for optimal fingerprint acquisition?
How should the finger be positioned on the sensor for optimal fingerprint acquisition?
What is one effect of having dry fingers during fingerprint acquisition?
What is one effect of having dry fingers during fingerprint acquisition?
Which of the following is NOT one of the five rules for successful fingerprint acquisition?
Which of the following is NOT one of the five rules for successful fingerprint acquisition?
What should be done if the finger is too wet during fingerprint acquisition?
What should be done if the finger is too wet during fingerprint acquisition?
What is the main goal of fingerprint acquisition?
What is the main goal of fingerprint acquisition?
What does 'user training' refer to in the context of fingerprint acquisition?
What does 'user training' refer to in the context of fingerprint acquisition?
Study Notes
Fingerprint Acquisition Best Practices
- Objective: Obtain a high-quality fingerprint for recognition.
- 5 Key Rules:
- Good Finger: Forefingers, middle fingers, and thumbs are ideal. Avoid 4th and 5th fingers due to small size and detail clarity.
- Good Positioning: Center the finger on the sensor to maximize the usable fingerprint area.
- Skin Treatment: Dry fingers result in low contrast images, while wet fingers produce black images. Dry wet fingers with a cloth and revitalize dry skin by rubbing.
- User Training: Prior to enrollment, provide users with a short learning session interacting with the sensor and receiving visual feedback.
- Correct Cleaning: Ensure the sensor surface is clean of grease and dirt using a soft, moist cloth. Avoid solvents and direct spraying.
Fingerprint Quality Score
- Scoring System: FxISO SDK assigns a score from 0 (poor) to 100 (good) to each acquired fingerprint.
- Recommendation: Discard fingerprints with a low score.
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Description
This quiz covers best practices for acquiring high-quality fingerprints essential for recognition systems. Learn about the ideal fingers to use, proper positioning, skin treatment, and user training techniques. Additionally, understand the scoring system used to evaluate fingerprint quality.
