UPEK Inc 5346T ユーザーズマニュアル
Troubleshooting 37
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Use the Manual enrollment mode. This procedure was specially designed for
cases when the standard automatic enrollment does not work. The procedure is
slower and checks several times the quality of images. It usually gives acceptable
results for problematic fingerprints. Manual enrollment alternatively allows
accepting images of lower quality. This practice is generally not recommendable
as problems with verification are highly probable for low quality images.
cases when the standard automatic enrollment does not work. The procedure is
slower and checks several times the quality of images. It usually gives acceptable
results for problematic fingerprints. Manual enrollment alternatively allows
accepting images of lower quality. This practice is generally not recommendable
as problems with verification are highly probable for low quality images.
Enrollment in Manual Mode
Use the Manual Mode only in cases when the standard procedure does not work. In
standard situations, the automatic procedure gives better results.
Use the Manual Mode only in cases when the standard procedure does not work. In
standard situations, the automatic procedure gives better results.
To enroll fingerprints in manual mode:
1
Click the Manual Mode button. Select the Use manual enrollment mode check
box.
box.
2
Put your finger on the sensor. You can see the actual image scanned by the sensor.
The evaluation of the sample starts. If the resulting image is evaluated as a good
one, you will be asked to accept the sample by clicking the Accept button. Lift
your finger from the sensor.
The evaluation of the sample starts. If the resulting image is evaluated as a good
one, you will be asked to accept the sample by clicking the Accept button. Lift
your finger from the sensor.
3
Create three fingerprints samples. If the samples are successfully matched, the
final fingerprint template is created.
final fingerprint template is created.
4
If you cannot create a good sample, you can select the Accept low quality images
check box. This option allows accepting low quality images. Use this option only
as the last possibility because the probability of problems during fingerprint
recognition and verification is very high.
check box. This option allows accepting low quality images. Use this option only
as the last possibility because the probability of problems during fingerprint
recognition and verification is very high.
Technical Details
Statistics acquired from usability testing says that usually the first sample is the best one.
Therefore the matching algorithm (both in automatic and manual modes) takes the first
sample and compares it with the second and the third ones. If no match, the first sample
is used for the final template. However, the resulting image is considered to be low
quality. (As matching fails in this case, it can fail later during any verification process). It
is recommended to re-enroll the finger.
Statistics acquired from usability testing says that usually the first sample is the best one.
Therefore the matching algorithm (both in automatic and manual modes) takes the first
sample and compares it with the second and the third ones. If no match, the first sample
is used for the final template. However, the resulting image is considered to be low
quality. (As matching fails in this case, it can fail later during any verification process). It
is recommended to re-enroll the finger.