CSD 450f Scanner User Guide

CSD 450F Scanner Dual-Digit Optical Scanner

User Guide

CSD 450F Dual-Digit Optical Scanner

3M Cogent, Inc. - User Guide � 2 March 27, 2013

©2013 3M Cogent, Inc. All rights reserved.

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Chapter 1

Hardware Overview

CSD 450F scanner The CSD 450F is a lightweight and compact, certified dual-digit optical fingerprint scanner

which captures high quality prints through an advanced optics design to enhance ambient light

discrimination. It is powered by a single USB 2.0 interface to eliminate excessive cabling, and

its small footprint has no moving parts to allow quick and easy integration into new or existing

applications. The larger platen area of the CSD450 allows the capture of a dual-digit flat

fingerprint impression or a single-digit rolled impression, and it is FBI Appendix F and FIPS 201

PIV certified.

Features of this scanner include auto-capture and adjustable brightness and contrast, with an

image acquisition rate of fifteen frames per second. The CSD450 integrates into third-party

applications through software development kits (SDKs), built using 3M Cogent’s standard

technology and providing biometric functions such as fingerprint acquisition, finger

segmentation, 1:1 and/or 1:N verification, and quality assessment.

CSD 450F Technical Specifications

The following table details the CSD 450F technical specifications.

Specification Detail Resolution 500 ppi

Uniform Illumination Automatically calibrated

Platen Size 46 x 46 mm

Active Platen Area 800 x 750 pixels

Interface USB 2.0

Grayscale 8-bit, 256 levels

Connection/Power USB 2.0 (500 mA @ 5V)

Operating Temperature Range 0⁰C to 55⁰C

Weight 0.45 kg

Dimensions 84 x 100 x 76 mm

Minimum Computer Specifications 2 GHz or higher P4 compatible CPU

512 MB RAM

USB 2.0 compliant ports or USB 2.0 PCI card

Windows 2000 or above

Certification ISO-IEC 19794-4:2005

FIPS 201, FBI PIV-071006, Mobile ID SAP 45

FBI IAFIS IQS Appendix F

EN 55022:2006, EN

55024:1998+A1:2001+A2:2003



Powering on the Scanner

Before using the scanner, you must first connect it to a computer. To connect the scanner to a

computer, ensure that the computer is powered and booted. Plug in the scanner cable to an

available USB 2.0 port in the computer. The scanner will be powered on.

NOTE: the scanner is powered by the computer via USB. When power to the USB ports is

turned off (i.e., the computer is in hibernate or standby mode), it cannot power the scanner.



Chapter 2

Capturing Fingerprints

Before you begin capturing fingerprints, keep the following in mind:

Be sure that the person’s hands and the scanner glass platen are clean and free from debris.

Excessive perspiration has the same effect as too much ink in traditional fingerprinting. If

necessary, clean the person’s hands before each print capture. At the same time, if the

person’s skin is too dry or too cold, the print will be too light. If this is the case, you may use

any oil-free lotion to moisturize the person’s hands.

(For more information about cleaning and moisturizing the person’s hands, refer to Appendix

A: Operating the CSD 450F Scanner for Maximum Performance on Page 11.)

FIGURE 2-1: Fingerprint record screen from sample application.



The CSD450F supports the desired “2-2-1” fingerprint scanning method for flat impressions,

along with individual rolled fingerprints from each digit. Automatic segmentation will separate

dual-digit impressions into individual finger images, and a sequencing module will verify the

proper order of rolled fingerprint captures against the prior sequence of flat acquisitions. The

application will guide the operator through a desired sequence using a series of LED indicators

on the device itself.

Capturing Two fingers

To capture two fingers:

Instruct the person to place his/her two fingers flat on platen and press down firmly (figure)

NOTE: When scanning prints, be careful not to press too hard, as this will result in images that

have darker ridges of black spots.

FIGURE 2-2: Separate images of dual-digit capture from the right hand.

After each image capture is complete, the individual is instructed to remove his/her fingers

from the glass platen and prepare the next finger(s) for acquisition.



Capture Single Fingers

To capture single fingerprints:

Instruct the person to place his/her finger flat on the glass platen and press firmly (figure)

NOTE: When scanning prints, be careful not to press too hard, as this will result in images that

have darker ridges or black spots.

FIGURE 2-3: Image of a single-digit thumb capture from the right hand.

After capture is complete, the individual is instructed to remove his/her fingers from the glass

platen.



Capturing Rolled Fingerprints

To capture rolled fingerprints:

Instruct the subject to center the core on the scanner platen and roll the finger to the right,

maintaining its position so that it will be centered.

FIGURE 2-4: Placing the finger on the platen and starting to roll the print (operator-assisted).

Instruct the subject to slowly roll the finger from the right to the left until a full print is

obtained.

FIGURE 2-5: Completing the rolled fingerprint (operator-assisted).



NOTE: To ensure a proper print capture, be sure to prevent lifting or sliding of the finger

during the roll.

After acquisition is complete, instruct the subject to remove his/her finger from the glass

platen.

FIGURE 2-6: Completed rolled fingerprint as displayed in sample application.

NOTE: For capturing left-hand rolled fingerprints, roll from left to right, nail to nail.



FIGURE 2-7: Sample application screen following complete fingerprint process.



Appendix A

Operating the CSD 450F Scanner for

Maximum Performance

General Guidelines 3M Cogent recommends that you observe the following guidelines for operation of your

scanner:

Warm up the CSD 450F: The scanner contains a build-in scanner platen control, which ensures

that the glass platen remains at the optimum temperature for fingerprint capture. The

temperature control helps prevent condensation from forming on the glass, and also causes

increased smoothness of the skin, both of which aid in maximizing fingerprint image quality.

When you power on the scanner, you must allow the scanner to warm up. The glass platen

should be slightly warm to the touch before you begin use.

Avoid having hard objects (e.g., handcuffs, watches, rings, etc.) come into contact with the

glass platen: Sharp objects, particularly metals, may scratch the glass platen. Be very careful

when capturing fingerprints of people wearing handcuffs or jewelry.

Cleaning Guidelines Before each use of the system, ensure that the glass capture platen, as well as the person’s

fingers, is free from debris and bacteria.

Moisturizing and Clean the Person’s Hands

It is recommended that people wash their hands before the scanning process. If the person’s

hands are too dry, the print image will be too light in the display. You can have the person

moisturize his/her hands using a baby wipe free of lotion, scent, and alcohol. Baby wipes are

sold in a pop-up container which helps avoid infection, as the used wipes can be easily

discarded.

Excessive perspiration has the same effect as too much ink in traditional fingerprinting. People

should dry their hands in there is perspiration.

Cleaning the Glass Capture Platen

3M Cogent recommends cleaning the glass capture platen before each use in order to clear it

of debris.



Optimizing Print Capture To ensure the best quality print is captured, 3M Cogent recommends using the following

guidelines:

Positioning the Finger on the Fingerprint Sensor

During enrollment, be sure to properly position the finger on the sensor. The following table

describes poor placement and proper placement on the sensor.

Image Condition

Too High

The finger is positioned too high on the

sensor and does not offer enough

information to accurately enroll an image.

Too Low

The finger is positioned too low on the sensor

and may not be properly enrolled.

Skewed Left

The finger is off-center and somewhat

rotated. This fingerprint image can result in a

failure to properly identify them later on,

even if enough minutiae points have been

detected.



Skewed Right

The finger is off-center and somewhat

rotated. This fingerprint image can result in a

failure to properly identify them later on,

even if enough minutiae points have been

detected.

Optimal Image

The finger is properly placed with even

pressure and minimal rotation.

Capturing High-Quality Fingerprints

The condition of the finger itself may affect the image quality of the fingerprint. The following

table provides descriptions of typical finger conditions and 3M Cogent’s recommended

solutions for ensuring the capture of the highest quality fingerprints.

Image Condition Solution

Dry Finger

The finger is very dry and

difficult to capture.

Perform one of the following

actions:

Apply moisture to the finger

using oil from your forehead.

Breathe on the finger.

Use a moisturizer that does

not contain alcohol.

As a last resort, enroll a

different finger.



Wet Finger

Remove excessive moisture

from either the finger or the

finger sensor.

Perform one of the following

actions:

To remove the excessive

moisture from your finger,

wipe your finger on a cloth or

Kleenex to absorb the

moisture.

To remove excessive

moisture from the fingerprint

sensor, please refer to

Cleaning the Glass Capture

Platen chapter.

Damage to Finger

The fingerprint may have

future issues with

identification due to the

damaged area of the finger.

Enroll a different finger.

Not Enough Pressure

The user did not apply

enough pressure. As a result,

the image looks very light

and some of the surrounding

areas are not captured.

The user should apply

moderate but steady

pressure; about the same

pressure as pressing a button

on a telephone.

Too Much Pressure

The user is applying too

much pressure on the sensor.

This distorts the fingerprint

image and will make it

difficult to identify in the

future.

The user should apply

moderate but steady

pressure; about the same

pressure as pressing a button

on a telephone.

CSD 450f Scanner User Guide

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