The increasing use of distributed authentication architecture has made interoperability of systems an important issue. Interoperability of systems re°ects the maturity of the technology and also improves confidence of users in the technology. Biometric systems are not immune to the concerns of interoperability. Interoperability of fingerprint sensors and its effect on the overall performance of the recognition sys- tem is an area of interest with a considerable amount of work directed towards it. This research analyzed effects of interoperability on error rates for fingerprint datasets captured from two optical sensors and a capacitive sensor when using a single commercially available fingerprint matching algorithm. The main aim of this research was to emulate a centralized storage and matching architecture with multiple acquisition stations. Fingerprints were collected from 44 individuals on all three sensors and interoperable False Reject Rates of less than .31% were achieved using two different enrolment strategies.

1. Collaborative Project with Purdue University
Since August 2006
Analysis on
Finger Preference of Users for
Fingerprint Recognition Systems
Fi i tR iti S t
Jihyun Moon and Hale Kim, Inha Univ.
Matt Young and Steve Elliott, Purdue Univ.
February 1, 2007
2007 BERC Workshop

2. Class note for the 1st term of 2005
Contents
reference
Introduction
Test Protocol
bituation and Pr
Data Collection
Analysis Results
y
n
Conclusion and Future Work
Analysis on Hab
A s
2

3. Class note for the 1st term of 2005
Introduction
reference
Background
User habituation is a concept and term that is widely
used within the biometric industry, especially that of
d ithi th bi ti i d t i ll th t f
bituation and Pr
the biometric standards community, without a
detailed definition or means necessary to measure
y
n
and determine habituation.
Purpose
Analysis on Hab
To assess the concept of “habituation” for biometric
systems, study.
systems fingerprints in particular for this study
s
Furthermore, to investigate the affects of handedness
and finger preference in discussing “habituation”.
g p g
A
3

4. Class note for the 1st term of 2005
Test Protocol
reference
Expected Measurements
Demographic information PURDUE & INHA
Handedness PURDUE & INHA
bituation and Pr
Finger preference PURDUE & INHA
Image quality (NFIQ) INHA
n
Condition: Use-ness of Hand cream
Region of Overlap
g p INHA
Analysis on Hab
Matching Performance (BOZORTH3) INHA
Statistical analysis
s
ROC curves in time series for each group
ROC curves for inter-group analysis (except for G4)
Distributions in time series
A
IQ, OL
4

5. Class note for the 1st term of 2005
Test Protocol(INHA)
reference
Sensor
U.Are.U4000 by DigitalPersona
bituation and Pr
Subject
At least 15 persons per each group
n
Procedure (enrolled, attempt)
Group# Week1 Week2 Week3 Week4 Week5 Week6
1 7 images
i 3 images
i 3 images
i 3 images 3 images
i i 3 images
i
Analysis on Hab
3 images
2 7 images 3 images
3 images
s
3 7 images 3 images
3 images
A
4 7 images
3 images
/3 images
5

6. Class note for the 1st term of 2005
Test Protocol
reference
Fingerprint Image Filename convention
SSS-F-I-W#.bmp
Where SSS is the subject #, F is the finger # (1-3), I is the
bituation and Pr
image # (1-10 or 1-3), and W# is the week # (1-6).
Purdue will use the subject #s from 1-99. Inha will use the
n
subject #s from 100 – 199 (or greater as needed).
Restrictions
Analysis on Hab
Role of the supervisor
The supervisor shall inform the users of the instructions con
s
tained in the first point in the delimitations section. Howev
er; the supervisor shall not engage in any physical assistanc
e of any sort while the user is submitting finger images.
A
6

7. Class note for the 1st term of 2005
Data Collection(INHA)
reference
Subjects
Group1 Group2
SubjectID SubjectID
100 120 126 143
bituation and Pr
101 121 131 144
102 122 132 145
105 123 133 146
108 124 136 147
111 125 137 148
n
112 127 138 149
113 128 139 150
114 129 140 151
118 141 152
Total Subjects 19 Total Subjects 20
Analysis on Hab
Group3 Group4
SubjectID SubjectID
153 164 174 183 193 203
154 165 175 184 194 204
s
155 166 176 185 195 205
156 167 177 186 196 206
157 168 178 187 197
159 169 179 188 198
160 170 180 189 199
161 171 181 190 200
A
162 172 182 191 201
163 173 192 202
Total Subjects 29 Total Subjects 24
7

8. Class note for the 1st term of 2005
Data Collection(BSPA)
reference
Subjects
Group1 Group2
SubjectID SubjectID
bituation and Pr
18 30 2 13
19 31 3 15
21 69 4 17
22 6
24 9
n
25 11
26 12
Total Subjects 10 Total Subjects 10
Analysis on Hab
Group3 Group4
SubjectID SubjectID
28 42 50 59
35 44 52 60
s
36 46 53 65
37 47 55
38 48 56
39 71 57
40 58
A
Total S
Subjects 13 Total S
Subjects 10
8

9. Class note for the 1st term of 2005
Data Collection(INHA)
reference
Procedure
Before adjustment
bituation and Pr
Group# Week1 Week2 Week3 Week4 Week5 Week6
1 10 images 3 images 3 images 3 images 3 images 3 images
2 10 images 3 images
n
3 10 images 3 images
4 10 images
/3 images
Analysis on Hab
After adjustment
Group#
p Week1 Week2 Week3 Week4 Week5 Week6 Week7
s
1 10 images 3 images 3 images 3 images 3 images 3 images
2 10 images 3 images
3 10 images 3 images
A
4 10 images
/3 images
9

10. Class note for the 1st term of 2005
Data Collection(BSPA)
reference
Procedure
Before adjustment
bituation and Pr
Group# Week1 Week2 Week3 Week4 Week5 Week6
1 10 images 3 images 3 images 3 images 3 images 3 images
2 10 images 3 images
n
3 10 images 3 images
4 10 images
/3 images
Analysis on Hab
After adjustment
Group#
p Week1 Week2 Week3 Week4 Week5 Week6 Week7
s
1 10 images 3 images 3 images 3 images 3 images
2 10 images 3 images
3 10 images 3 images
A
4 10 images
/3 images
10

11. Class note for the 1st term of 2005
Data Collection(INHA)
reference
Fingerprint Image
Filename convention
Before adjustment: SSS-F-I-W#.bmp
bituation and Pr
After adjustment: SSS-F-II-#.bmp
File Size (Adjustment)
n
Fix size to Width 320 and Height 352
Number of Images
Analysis on Hab
Group Images per subject Subjects Total
1 75 19 1425
2 39 20 780
3 39 29 1131
s
4 39 24 936
A
11

12. Class note for the 1st term of 2005
Data Collection(BSPA)
reference
Fingerprint Image
Filename convention
Before adjustment: SSS-F-I-W#.bmp
bituation and Pr
After adjustment: SSS-F-II-#.bmp
File Size (Adjustment)
n
Fix size to Width 320 and Height 352
Number of Images
Analysis on Hab
Group Im ages per subject Subjects Total
1 66 10 660
2 39 10 390
3 39 13 507
s
4 39 10 390
A
12

13. Class note for the 1st term of 2005
Data Collection
reference
Environment1 – CVLab
bituation and Pr
Analysis on Hab
A s n
13

14. Class note for the 1st term of 2005
Data Collection
reference
Environment2 – Computer Room 424
bituation and Pr
Analysis on Hab
A s n
14

15. Class note for the 1st term of 2005
Data Collection
reference
Forms for collecting information
bituation and Pr
Analysis on Hab
A s n
15

16. Class note for the 1st term of 2005
Analysis Results(INHA)
reference
Summary on Personal Data
(persons) (persons)
Total # of subjects Gender Male Female
Group1
G 1 19 Group1
G 1 18 1
bituation and Pr
Group2 20 Group2 16 4
Group3 29 Group3 28 1
Group4 24 Group4 24 0
93.5% (persons)
n
Ethnicity Indian etc. Asian Black Hispanic etc. White Other
Group1 0 19 0 0 0 0
Group2 0 20 0 0 0 0
Group3 0 29 0 0 0 0
Group4 0 24 0 0 0 0
100.0%
100 0%
Analysis on Hab
(persons) <고찰>
Handedness Right Left Ambidextrous 1. 성별 구성에 있어서 남성의 비율이 월등히 큼
Group1 16 2 1
Group2 16 1 3 2. 모두 동양인임 대부분 오른손잡이임
Group3 26 2 1
3 남성이 대부분이기 때문에 피부 보습을 위한
3.
s
Group4 23 0 1
조처를 하지 않는 경우가 상대적으로 많음
88.0% (persons) (persons)
4. 지문 인식 시스템을 사용해본 경험이 없는
Hand cream Yes No Used before Yes No 사람들로 참여자를 구성하고자 하였으나, 면접
Group1 6 13 Group1 3 16 후 일부에서 사용 경험이 있었던 것으로 나타남
A
Group2 8 12 Group2 3 17
Group3 9 20 Group3 4 25
Group4 6 18 Group4 3 21
68.5% 85.9%
16

17. Class note for the 1st term of 2005
Analysis Results(BSPA)
reference
Summary on Personal Data
(persons) (persons)
Total # of subjects Gender Male Female
Group1 10 Group1 8 2
bituation and Pr
Group2 10 Group2 8 2
Group3 13 Group3 12 1
Group4 10 Group4 9 1
86.0% (persons)
n
Ethnicity Indian etc. Asian Black Hispanic etc. White Other
Group1 0 1 0 0 9 0
Group2 0 0 0 0 10 0
Group3 0 0 0 0 13 0
Group4 1 0 0 0 9 0
95.3%
95 3%
Analysis on Hab
(persons) <고찰>
Handedness Right Left Ambidextrous
1. 성별 구성에 있어서 남성의 비율이 월등히 큼
Group1 9 0 1
Group2 8 1 1 2. 모두 동양인임 대부분 오른손잡이임
Group3 13 0 0
3 남성이 대부분이기 때문에 피부 보습을 위한
3.
s
Group4 10 0 0
조처를 하지 않는 경우가 상대적으로 많음
93.0% (persons) (persons)
4. 지문 인식 시스템을 사용해본 경험이 없는
Hand cream Yes No Used before Yes No 사람들로 참여자를 구성하고자 하였으나, 면접
Group1 3 7 Group1 6 4 후 일부에서 사용 경험이 있었던 것으로 나타남
A
Group2 2 8 Group2 7 3
Group3 2 11 Group3 4 9
Group4 4 6 Group4 5 5
74.4% 51.2%
17

18. Class note for the 1st term of 2005
Analysis Results(INHA)
reference
Summary on Personal Data
Total # of subjects
bituation and Pr
Group1 Group2 Group3 Group4
n
Gro up1
Gro up4
21%
26%
Analysis on Hab
Gro up2
22%
Gro up3
31%
A s
18

19. Class note for the 1st term of 2005
Analysis Results(BSPA)
reference
Summary on Personal Data
Total # of subjects
bituation and Pr
Group1 Group2 Group3 Group4
n
Gro up4 Gro up1
23% 23%
Analysis on Hab
Gro up2
Gro up3 23%
31%
A s
19

20. Class note for the 1st term of 2005
Analysis Results(INHA)
reference
Summary on Personal Data
Gender distributions of 4 groups
bituation and Pr
Male Female
35
ns
30
n
Num be r of person
25
20
15
Analysis on Hab
10
5
0
Group1
G 1 Group2
G 2 Group3
G 3 Group4
G 4
s
Group#
A
20

21. Class note for the 1st term of 2005
Analysis Results(BSPA)
reference
Summary on Personal Data
Gender distributions of 4 groups
bituation and Pr
Male Female
15
n
Num b er o f p erso ns
s
10
Analysis on Hab
e
5
0
s
Group1 Group2 Group3 Group4
Gro up#
A
21

22. Class note for the 1st term of 2005
Analysis Results(INHA)
reference
Summary on Personal Data
Handedness distributions of 4 groups
bituation and Pr
Right Left Ambidextrous
30
ns
n
25
Num be r of person
20
15
Analysis on Hab
10
5
0
s
Group1
G 1 Group2
G 2 Group3
G 3 Group4
G 4
Group#
A
22

23. Class note for the 1st term of 2005
Analysis Results(BSPA)
reference
Summary on Personal Data
Handedness distributions of 4 groups
bituation and Pr
Right Left Ambidextrous
15
n
Num b er o f p erso ns
s
10
Analysis on Hab
e
5
0
s
Group1 Group2 Group3 Group4
Gro u p#
A
23

24. Class note for the 1st term of 2005
Analysis Results(INHA)
reference
Summary on Personal Data
Hand-
Hand cream useness distributions of 4 groups
bituation and Pr
Yes No
30
ns
n
25
Num be r of person
20
15
Analysis on Hab
10
5
0
s
Group1
G 1 Group2
G 2 Group3
G 3 Group4
G 4
Group#
A
24

25. Class note for the 1st term of 2005
Analysis Results(BSPA)
reference
Summary on Personal Data
Hand-
Hand cream useness distributions of 4 groups
bituation and Pr
Yes No
15
n
Num b er o f p erso ns
s
10
Analysis on Hab
e
5
0
s
Group1 Group2 Group3 Group4
Gro up#
A
25

26. Class note for the 1st term of 2005
Analysis Results(INHA)
reference
Summary on Personal Data
Sensor useness distributions of 4 groups
bituation and Pr
Yes No
30
ns
n
25
Num be r of person
20
15
Analysis on Hab
10
5
0
s
Group1 Group2 Group3 Group4
Group#
A
26

27. Class note for the 1st term of 2005
Analysis Results(BSPA)
reference
Summary on Personal Data
Sensor useness distributions of 4 groups
bituation and Pr
Yes No
15
n
Num b e r o f p erso ns
s
10
Analysis on Hab
5
0
s
Group1 Group2 Group3 Group4
Gro up#
A
27

28. Class note for the 1st term of 2005
Analysis Results
reference
Summary on Environmental Data (average)
(°C)
Temperature Week1 Week2 Week3 Week4 Week5 Week6
Group1
G 1 26.
26 9 27.
27 6 27.
27 2 27.
27 5 29.
29 7 26.
26 7
bituation and Pr
Group2 27. 3 26. 8
Group3 28. 9 27. 6
Group4 25. 4
(%)
n
Moisture Week1 Week2 Week3 Week4 Week5 Week6
Group1 41. 5 39 35. 5 40. 5 38. 5 49
Group2 43 51. 9
Group3 42 29. 6
G oup
Group4 5
54. 2
Analysis on Hab
A s
28

29. Class note for the 1st term of 2005
Analysis Results(INHA)
reference
Finger Preference Result
Finger Preference - 1st Finger
bituation and Pr
Group1 Group2 Group3 Group4
18
16
n
14
equenc y
12
10
8
Fre
Analysis on Hab
6
4
2
0
LL LR LM LI LT RT RI RM RR RL
s
Finger Index
A
29

30. Class note for the 1st term of 2005
Analysis Results(BSPA)
reference
Finger Preference Result
Finger Preference - 1st Finger
bituation and Pr
Group1 Group2 Group3 Group4
12
n
10
Fre uenc y
8
6
eq
Analysis on Hab
4
2
0
LL LR LM LI LT RT RI RM RR RL
s
Finger Index
A
30

31. Class note for the 1st term of 2005
Analysis Results(INHA)
reference
Finger Preference Result – cont.
Finger Preference - 2nd Finger
bituation and Pr
Group1 Group2 Group3 Group4
14
12
n
10
equenc y
8
6
Analysis on Hab
Fre
4
2
0
s
LL LR LM LI LT RT RI RM RR RL
Finger Index
A
31

32. Class note for the 1st term of 2005
Analysis Results(BSPA)
reference
Finger Preference Result – cont.
Finger Preperence - 2nd Finger
bituation and Pr
Group1 Group2 Group3 Group4
6
n
Fre uenc y
4
eq
Analysis on Hab
2
0
LL LR LM LI LT RT RI RM RR RL
s
Finger Index
A
32

33. Class note for the 1st term of 2005
Analysis Results(INHA)
reference
Finger Preference Result – cont.
<고찰>
Finger Preference - 3rd Finger
bituation and Pr
1. 지문 영상 수집 실험 전 선택한 선호 손가락은,
사용자들의 무의식에 의한 선택에 기반한 경우가 Group1 Group2 Group3 Group4
많았다고 생각됨
12
2. 오른손잡이가 많았던 관계로 무의식적으로
오른손 세 손가락을 선택하는 경우가 많았음
n
10
3. 특히, 첫 번째 선호 손가락은 엄지와 검지인
equenc y
경우가 대부분이었으며, 순번이 뒤로 갈 수록
8
선택에 있어서 별 다른 기준이 없는 것처럼 보임
6
Analysis on Hab
Fre
4
2
0
s
LL LR LM LI LT RT RI RM RR RL
Finger Index
A
33

34. Class note for the 1st term of 2005
Analysis Results(BSPA)
reference
Finger Preference Result – cont.
Finger Preference - 3rd Finger
bituation and Pr
Group1 Group2 Group3 Group4
6
n
Fre q uenc y
4
Analysis on Hab
2
0
s
LL LR LM LI LT RT RI RM RR RL
Finger Index
A
34

35. Class note for the 1st term of 2005
Analysis Results(INHA)
reference
(persons)
Finger Preference Change Prefernece
change
Yes No
Group1 9 10
Group2 6 14
After Finger Preference Change
g g Group3
p 17 12
bituation and Pr
Group4 8 16
Finger1 Finger2 Finger3
25
n
20
Frequency
15
10
Analysis on Hab
5
0
s
LL LR LM LI LT RT RI RM RR RL
Finger Index
<고찰>
1. 센서 사용 후의 선호도 변화를 살펴 본 결과
검지(LI, RI)로의 선호도 변화가 뚜렷해 짐.
A
2. 양손 엄지(LT, RT) 및 검지(LI, RI)로의
선호도 변화가 전체의 약 80.8%를 차지함.
35

36. Class note for the 1st term of 2005
Analysis Results(BSPA)
reference
(persons)
Finger Preference Change Preference
change
Yes No
Group1 3 7
Group2 4 6
After Finger Preference Change
g g Group3 5 8
bituation and Pr
Group4 8 2
Finger1 Finger2 Finger3
8
7
n
6
Frequency
5
4
3
F
Analysis on Hab
2
1
0
LL LR LM LI LT RT RI RM RR RL
s
Finger Index
A
36

37. Class note for the 1st term of 2005
Analysis Results(INHA)
reference
Finger Preference Change – occurrence table
Finger1 After preference changed Finger2 After preference changed
Before
B f LL LR LM LI LT RT RI RM RR RL Before
B f LL LR LM LI LT RT RI RM RR RL
bituation and Pr
LL 0 0 1 0 1 2 1 0 0 0 LL 0 0 0 0 0 0 0 0 0 0
LR 0 0 0 0 0 0 0 0 0 0 LR 0 0 0 1 0 0 1 0 0 0
LM 0 0 0 0 0 0 0 0 0 0 LM 0 0 0 0 0 0 0 0 0 0
LI 0 0 0 3 1 0 0 0 0 0 LI 0 0 0 1 0 1 1 0 0 0
LT 0 0 0 3 0 0 1 0 0 0 LT 1 0 0 2 1 1 2 0 0 0
n
RT 0 0 0 1 0 0 15 1 0 0 RT 0 0 0 2 0 1 1 0 0 0
RI 0 0 0 0 0 3 7 0 0 0 RI 0 0 1 5 1 2 2 4 0 1
RM 0 0 0 0 0 0 0 0 0 0 RM 0 0 0 3 2 1 1 0 0 0
RR 0 0 0 0 0 0 0 0 0 0 RR 0 0 0 0 0 0 0 0 0 0
RL 0 0 0 0 0 0 0 0 0 0 RL 0 0 0 1 0 0 0 0 0 0
Analysis on Hab
Finger3 After preference changed All After preference changed
Before LL LR LM LI LT RT RI RM RR RL Before LL LR LM LI LT RT RI RM RR RL
LL 0 0 0 0 1 0 0 0 0 0 LL 0 0 1 0 2 2 1 0 0 0
LR 0 0 0 0 0 0 0 0 0 0 LR 0 0 0 1 0 0 1 0 0 0
LM 0 0 0 0 2 2 0 1 0 0 LM 0 0 0 0 2 2 0 1 0 0
LI 0 0 0 1 0 2 2 1 0 0 LI 0 0 0 5 1 3 3 1 0 0
s
LT 0 0 0 1 1 0 0 1 0 0 LT 1 0 0 6 2 1 3 1 0 0
RT 0 0 1 0 1 0 1 1 0 0 RT 0 0 1 3 1 1 17 2 0 0
RI 0 0 0 1 1 2 0 1 0 0 RI 0 0 1 6 2 7 9 5 0 1
RM 0 0 1 2 0 3 0 3 2 0 RM 0 0 1 5 2 4 1 3 2 0
RR 0 0 0 0 1 2 0 1 0 0 RR 0 0 0 0 1 2 0 1 0 0
A
RL 0 0 0 0 0 0 0 1 0 0 RL 0 0 0 1 0 0 0 1 0 0
80.8%
37

38. Class note for the 1st term of 2005
Analysis Results(BSPA)
reference
Finger Preference Change – occurrence table
Finger1 After preference changed Finger2 After preference changed
bituation and Pr
Before LL LR LM LI LT RT RI RM RR RL Before LL LR LM LI LT RT RI RM RR RL
LL 0 0 0 0 0 0 0 0 0 0 LL 0 0 0 0 0 0 0 0 0 0
LR 0 0 0 0 0 0 0 0 0 0 LR 0 0 0 0 0 0 0 0 0 0
LM 0 0 0 0 0 0 0 0 0 0 LM 0 0 0 0 0 0 0 0 0 0
LI 0 0 0 0 0 0 0 0 0 0 LI 0 0 0 1 0 0 0 0 0 0
LT 0 0 0 0 1 0 0 0 0 0 LT 0 0 0 0 2 0 0 0 0 0
RT 0 0 0 0 0 2 7 0 0 0 RT 0 0 0 0 2 7 0 4 0 0
n
RI 0 0 0 0 0 0 31 0 0 0 RI 0 0 0 0 0 1 2 5 1 0
RM 0 0 0 0 0 0 0 2 0 0 RM 0 0 0 1 0 2 0 14 0 0
RR 0 0 0 0 0 0 0 0 0 0 RR 0 0 0 0 0 0 0 0 1 0
RL 0 0 0 0 0 0 0 0 0 0 RL 0 0 0 0 0 0 0 0 0 0
Finger3 After preference changed All After preference changed
Analysis on Hab
Before LL LR LM LI LT RT RI RM RR RL Before LL LR LM LI LT RT RI RM RR RL
LL 0 0 0 0 0 0 0 0 0 0 LL 0 0 0 0 0 0 0 0 0 0
LR 0 0 0 0 0 0 0 0 0 0 LR 0 0 0 0 0 0 0 0 0 0
LM 0 0 1 0 0 0 0 1 0 0 LM 0 0 1 0 0 0 0 1 0 0
LI 0 0 0 5 0 1 0 0 0 0 LI 0 0 0 6 0 1 0 0 0 0
LT 0 0 1 0 5 1 0 0 0 0 LT 0 0 1 0 8 1 0 0 0 0
s
RT 0 0 1 0 0 3 0 1 2 0 RT 0 0 1 0 2 12 7 5 2 0
RI 0 0 0 0 0 0 0 0 0 0 RI 0 0 0 0 0 1 33 5 1 0
RM 0 0 0 3 1 1 0 7 2 0 RM 0 0 0 4 1 3 0 23 2 0
RR 0 0 0 1 0 1 0 0 5 0 RR 0 0 0 1 0 1 0 0 6 0
RL 0 0 0 0 0 0 0 0 0 0 RL 0 0 0 0 0 0 0 0 0 0
A
38

39. Class note for the 1st term of 2005
Analysis Results(INHA)
reference
Finger Preference Change
All After preference changed
Before LL LR LM LI LT RT RI RM RR RL Total
LL 0 0 1 0 2 2 1 0 0 0 6
bituation and Pr
LR 0 0 0 1 0 0 1 0 0 0 2
LM 0 0 0 0 2 2 0 1 0 0 5
LI 0 0 0 5 1 3 3 1 0 0 13
LT 1 0 0 6 2 1 3 1 0 0 14
RT 0 0 1 3 1 1 17 2 0 0 25
RI 0 0 1 6 2 7 9 5 0 1 31
n
RM 0 0 1 5 2 4 1 3 2 0 18
RR 0 0 0 0 1 2 0 1 0 0 4
RL 0 0 0 1 0 0 0 1 0 0 2
Total 1 0 4 27 13 22 35 15 2 1 120
Analysis on Hab
Distributions of before/ after preference change
Before After
40
35
s
30
Frequenc y
25
20
15
10
A
5
0
LL LR LM LI LT RT RI RM RR RL
Finger Index
39

40. Class note for the 1st term of 2005
Analysis Results(BSPA)
reference
Finger Preference Change
All After preference changed
Before LL LR LM LI LT RT RI RM RR RL
LL 0 0 0 0 0 0 0 0 0 0
bituation and Pr
LR 0 0 0 0 0 0 0 0 0 0
LM 0 0 1 0 0 0 0 1 0 0
LI 0 0 0 6 0 1 0 0 0 0
LT 0 0 1 0 8 1 0 0 0 0
RT 0 0 1 0 2 12 7 5 2 0
n
RI 0 0 0 0 0 1 33 5 1 0
RM 0 0 0 4 1 3 0 23 2 0
RR 0 0 0 1 0 1 0 0 6 0
RL 0 0 0 0 0 0 0 0 0 0
Distributio
Di t ib ti ns o f b f re/ after preferenc e c h
befo / ft f hange
Analysis on Hab
Before After
45
40
35
s
Freq uen c y
30
25
20
15
10
A
5
0
LL LR LM LI LT RT RI RM RR RL
Finger Index
40

41. Class note for the 1st term of 2005
Analysis Results – Habituation
reference
Denominator
Foreground Ratio (F) Numerator
Number of pixels in
foreground area
N fforeground
F= ×100(%)
bituation and Pr
d
W ×H Image height(=352)
Image width(=320) Overlapped area
n
Sample Foregrounds of 4 Groups
Group1 Group2 Group3 Group4
0.25
Analysis on Hab
0.2 Enrolled sample Tested sample
uency
0.15
s
Frequ
0.1
0.05
A
0
0% 10% 20% 30% 40% 50% 60% 70% 80% 90% 100%
Ratio of area
41

42. Class note for the 1st term of 2005
Analysis Results – Habituation
reference
Denominator
Region of Overlap: Method1 Numerator
Number of pixels in
overlapped area
N overlap
M1 = × 100(%)
bituation and Pr
l
N fg _ enrolled Number of pixels in
Overlapped area
foreground area of
enrolled image
n
M1: OA/ Seg_Enrolled
Group1 Group2 Group3 Group4
0.25
Analysis on Hab
Enrolled sample Tested sample
0.2
uency
0.15
s
Frequ
0.1
0.05
A
0
0% 10% 20% 30% 40% 50% 60% 70% 80% 90% 100%
Score
42

43. Class note for the 1st term of 2005
Analysis Results – Habituation
reference
Region of Overlap: Method2
N overlap
M2= × 100(%)
N fg _ enrolled + N fg _ tested − N overlap
bituation and Pr
Number of pixels in Number of pixels in Number of pixels in overlapped area
foreground area of foreground area of tested image
enrolled image
n
M2: OA/ (Seg_Enrolled+Seg_Tested- OA)
Denominator
Group1 Group2 Group3 Group4
Numerator
0.25
Analysis on Hab
0.2
uency
0.15
s
Frequ
Overlapped area
0.1
0.05
A
0
0% 10% 20% 30% 40% 50% 60% 70% 80% 90% 100%
Score
Enrolled sample Tested sample
43

44. Class note for the 1st term of 2005
Analysis Results – Habituation
reference
Region of Overlap: Method3
Number of pixels in overlapped area
Number of pixels in whole image
N overlap N image
M3= × × 100(%)
bituation and Pr
N fg _ enrolled N fg _ enrolled Number of pixels in foreground area
of enrolled image
n
M3: M1/ Foreground_Enrolled
Group1 Group2 Group3 Group4
0.25
Analysis on Hab
0.2
uency
0.15
s
Frequ
0.1
0.05
A
0
0% 10% 20% 30% 40% 50% 60% 70% 80% 90% 100%
Score
44