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CAP5415 Fall 2004 Lecture 15 - CAP 5415 Computer Vision...

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Alper Yilmaz, Fall 2004 UCF CAP 5415 Computer Vision Fall 2004 Dr. Alper Yilmaz Univ. of Central Florida www.cs.ucf.edu/courses/cap5415/fall2004 Office: CSB 250
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Alper Yilmaz, Fall 2004 UCF Recap Motion Brightness constancy constraint Optical flow equation, brightness constancy equation Normal flow can be computed Parallel flow cannot ) , , ( ) , , ( t t y y x x I t y x I + + + = 0 = + + t y x I vI uI equation line 0 = + = y t y x I I I I u v
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Alper Yilmaz, Fall 2004 UCF Recap Horn & Schunck ) ( ) ( ) , ( 2 2 2 2 2 y x y x t y x v v u u I vI uI y x E + + + + + + = λ 0 ) ( 2 = + + + u I vI uI I t y x x 0 ) ( 2 = + + + v I vI uI I t y x y avg u u u - = 2 avg v v v - = 2 ( 29 ( 29 0 0 2 2 = - + + + = - + + + avg t y y x y avg t x y x x v I I I uI I v u I I I vI I u λ λ λ λ + + + + - = + + + + - = λ λ 2 2 2 2 y x t avg y avg x y avg y x t avg y avg x x avg I I I v I u I I v v I I I v I u I I u u
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Alper Yilmaz, Fall 2004 UCF Recap Schunck u v Find clusters of intersection points, select the cluster with maximum number of intersection as true flow
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Alper Yilmaz, Fall 2004 UCF Recap Lucas & Kanade + + = 2 ) ( t y x I vI uI E 0 ) ( 2 = + + t y x x I vI uI I 0 ) ( 2 = + + t y x y I vI uI I u E v E   B t y t x u A y y x y x x I I I I v u I I I I I I - - = 2 2 B A u 1 - =
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Alper Yilmaz, Fall 2004 UCF Global Motion
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Alper Yilmaz, Fall 2004 UCF
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