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ViBe: A universal background subtraction algorithm for video sequences
/ / f i x e d p a r ame t e r s f o r ViBe
/ / number o f samp l e s p e r p i x e l
i n t N = 2 0 ;
/ / r a d i u s o f t h e s p h e r e
i n t R = 2 0 ;
/ / number o f c l o s e samp l e s f o r b e i n g
/ / p a r t o f t h e background ( bg )
i n t ]min = 2 ;
/ / amount o f random s u b s amp l i n g
i n t = 1 6 ;
/ / d a ta
i n t width , h e i g h t ;
/ / c u r r e n t image
byt e image [ wid th ] [ h e i g h t ] ;
/ / background model
byt e s amp l e s [ wid th ] [ h e i g h t ] [N ] ;
/ / background / f o r e g r o u n d s e gme n t a t i o n map
byt e segMap [ wid th ] [ h e i g h t ] ;
/ / background and f o r e g r o u n d i d e n t i f i e r s
byt e b a ck g ro u nd = 0 ;
byt e f o r e g r o u n d = 2 5 5 ;
/ / f o r each p i x e l
f o r ( i n t x = 0 ; x < wid th ; x++){
f o r ( i n t y = 0 ; y < h e i g h t ; y++) {
/ / 1 . Compare p i x e l t o background model
i n t c o u n t = 0 , i n d e x = 0 , d i s t = 0 ;
whil e ( ( c o u n t < ]min ) && ( i n d e x < N ) ) {
/ / Eu c l i d e a n d i s t a n c e c omp u t a t i o n
d i s t = E u c l i dDi s t ( image [ x ] [ y ] ,
s amp l e s [ x ] [ y ] [ i n d e x ] ) ;
i f ( d i s t < R) {
c o u n t ++;
}
i n d e x ++;
}
/ / 2 . C l a s s i f y p i x e l and u p d a t e model
i f ( c o u n t >= ]min ) {
/ / s t o r e t h a t image [ x ] [ y ] 2 background
segMap [ x ] [ y ] = b a ck g ro u nd ;
/ / 3 . Update c u r r e n t p i x e l model
/ / g e t random number b e twe en 0 and −1
i n t r an d = getRandomNumber ( 0 , −1) ;
i f ( r an d == 0 ) { / / random s u b s amp l i n g
/ / r e p l a c e randomly ch o s en sample
r an d = getRandomNumber ( 0 , N−1) ;
s amp l e s [ x ] [ y ] [ r an d ] = image [ x ] [ y ] ;
}
/ / 4 . Update n e i g h b o r i n g p i x e l model
r an d = getRandomNumber ( 0 , −1) ;
i f ( r an d == 0 ) { / / random s u b s amp l i n g
/ / ch o o s e n e i g h b o r i n g p i x e l randomly
i n t xNG , yNG ;
xNG = getRandomNeighbrXCoordinate ( x ) ;
yNG = getRandomNeighbrYCoordinate ( y ) ;
/ / r e p l a c e randomly ch o s en sample
r an d = getRandomNumber ( 0 , N−1) ;
s amp l e s [xNG ] [ yNG ] [ r an d ] = image [ x ] [ y ] ;
}
}
e l s e { / / c o u n t < ]min
/ / s t o r e t h a t image [ x ] [ y ] 2 f o r e g r o u n d
segMap [ x ] [ y ] = f o r e g r o u n d ;
}
}
}
4 Comments
Eren
on 21 Nov 2016
I really want ViBe in matlab too. I found this link but i don't have its account to download. if you can, please help downloading. thanks.
Diarmaid Cualain
on 7 Feb 2019
Hi Eren,
If you dont have an account to download the files on that page, you can view each file individually, copy the contents to your own *.m file, and run the algorithim then. There are only three files there that you need.
Answers (1)
Ayush
on 2 Oct 2016
Best bet is to create a psedu code
also check this link if it helps!
vote if found helpful! ;)
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