dept. of visual contents, dongseo university 2008. 11. 24 seung il han [email protected]
DESCRIPTION
A visual surveillance using real-time curve evolution based on the level-set method and pan-tilt camera. Dept. of Visual Contents, Dongseo University 2008. 11. 24 Seung Il Han [email protected]. Outline. Objective Method of Real-time curve evolution - PowerPoint PPT PresentationTRANSCRIPT
A visual surveillance using real-time curve evolution based on the level-set method and pan-
tilt camera
Dept. of Visual Contents, Dongseo University
2008. 11. 24
Seung Il Han
Outline
23年 4月 21日INSTITUTE OF AMBIENT INTELIGENT, Han Seung Il, Dongseo Univ, E-mail : [email protected]
2
1. Objective2. Method of Real-time curve evolution
1. Composition of real-time curve evolution2. Advanced curve evolution method
3. The proposed system1. Binary process2. Active contour
4. Experiment5. Conclusion6. REFERENCE
Objective
23年 4月 21日3 INSTITUTE OF AMBIENT INTELIGENT, Han Seung Il, Dongseo Univ, E-mail : [email protected]
< Pan&Tilt Camera >
< Result of subtraction >
< Level Set > < Proposed >
Image subtraction
23年 4月 21日4 INSTITUTE OF AMBIENT INTELIGENT, Han Seung Il, Dongseo Univ, E-mail : [email protected]
< Near frame subtraction >< Background subtraction >
23年 4月 21日5
1. Method of Real-time curve evolution
INSTITUTE OF AMBIENT INTELIGENT, Han Seung Il, Dongseo Univ, E-mail : [email protected]
Composition of real-time curve evolution
23年 4月 21日6 INSTITUTE OF AMBIENT INTELIGENT, Han Seung Il, Dongseo Univ, E-mail : [email protected]
}\)x(x|x{ DythatsuchNyandLin
})x(\x|x{ ythatsuchNyandDLout
ntpoiteriorinanisif
Lif
Lif
tpoinexterioranisif
xxx
x
in
out
3
1
1
3
1
0
1
F Interior : ,
Lin :
Lout :
Exterior :
C :
1F
1F
3
3
1
0
1
outLF
x0(x) inLF
x0(x)
Process of real-time curve evolution
23年 4月 21日7 INSTITUTE OF AMBIENT INTELIGENT, Han Seung Il, Dongseo Univ, E-mail : [email protected]
< Advanced curve evolution >
No
No
Yes Yes
No
No
Yes
Scan Index in Two Line
Switch_in() Switch_out()
Eliminate redundantLout,Lin
Line end
Iteration
Next Index
1F
1
1F
1
23年 4月 21日8
2. The Proposed system
INSTITUTE OF AMBIENT INTELIGENT, Han Seung Il, Dongseo Univ, E-mail : [email protected]
The proposed system
23年 4月 21日9 INSTITUTE OF AMBIENT INTELIGENT, Han Seung Il, Dongseo Univ, E-mail : [email protected]
< Flow chart >
Image frame
Threshold movement
Movement
Active contour
Blob center in the range
Pen & Tilt camera
Pause subtraction & contour tracking
Loop
Yes
No
No
Yes
Yes
Levelset based tracking methodSubtraction
The proposed system
23年 4月 21日10 INSTITUTE OF AMBIENT INTELIGENT, Han Seung Il, Dongseo Univ, E-mail : [email protected]
When to move the camera
23年 4月 21日11 INSTITUTE OF AMBIENT INTELIGENT, Han Seung Il, Dongseo Univ, E-mail : [email protected]
< Pan & Tilt control>
23年 4月 21日12
3. Experiment & Conclusion
INSTITUTE OF AMBIENT INTELIGENT, Han Seung Il, Dongseo Univ, E-mail : [email protected]
Experiment
23年 4月 21日13 INSTITUTE OF AMBIENT INTELIGENT, Han Seung Il, Dongseo Univ, E-mail : [email protected]
< The proposed method >
< Conventional method >
Experiment
23年 4月 21日14 INSTITUTE OF AMBIENT INTELIGENT, Han Seung Il, Dongseo Univ, E-mail : [email protected]
< Continuous frame of proposed case >
Experiment
23年 4月 21日15 INSTITUTE OF AMBIENT INTELIGENT, Han Seung Il, Dongseo Univ, E-mail : [email protected]
< Continuous frame of conventional case>
Experiment
23年 4月 21日16 INSTITUTE OF AMBIENT INTELIGENT, Han Seung Il, Dongseo Univ, E-mail : [email protected]
< Center point in proposed case > < Center point in conventional case >
Conclusion
23年 4月 21日17 INSTITUTE OF AMBIENT INTELIGENT, Han Seung Il, Dongseo Univ, E-mail : [email protected]
References [1] Yonggang Shi, William Clem Karl, “A Real-Time Algorithm for
the Approximation of Level-Set-Based Curve Evolution”, vol.17, no.5, pp. 645-656, IEEE transactions on image processing, May 2008.
[2] S.Osher and J.Sethian, “Fronts propagation with curvature dependent speed: Algorithms based on Hamilton-Jacobi formulations” J.Comput. Phys., vol. 79, pp. 12-49, 1988.
[3] D.Peng, B.Merriman, S.Osher, H.Zhao, M.Kang, “APDE-based fast local level set method,” J. Comput. Phys., vol. 155, pp. 410-438, 1999.
[4] S.Osher, R.Fedkiw, “Level-Set Methods and Dynamic Implicit Surfaces.” pp. 17-24,pp. 119-137, New York: Springer Verlag, 2002.
[5] J.Sethian, “Level-Set Methods and Fast mat-ching Methods: Evolving Interfaces in Computat-ional Geometry, Fluid Mechanics, Computer Vision, and Materials Science.”, Cambridge, U.K.: Cambridge Univ. Press, 1999.
23年 4月 21日18 INSTITUTE OF AMBIENT INTELIGENT, Han Seung Il, Dongseo Univ, E-mail : [email protected]
Thank You
23年 4月 21日19 INSTITUTE OF AMBIENT INTELIGENT, Han Seung Il, Dongseo Univ, E-mail : [email protected]