Occluding Area 
Po FA R2R3 BB Qoo 9 
  
  
  
  
  
Bo R, E 
Grid Points Conjugate Points 
Par, o / P3 P4 Sy Ga 3, as ss 
Î 
7 T^ \ 
Pao Pa P22 Pas Po, a qi AN h. 
CRETA S M 
LA ÿ 
Po P, Pa\ Ps Pre Se Ay; Ss Iz qu Qs 
Occluding Area 
(a) 
  
  
  
  
  
  
  
  
  
  
  
  
Fig. 4 Rearrangement process for occlusions 
' 
on I9. Further the point P5» is assumed already found to be occluding in 
the 1st step. As the initial values of x-parallaxes of Py, and P53, those 
of P329 and P54 are given respectively. When the hatched area (b) is 
rearranged to remove perspective distorsions, the height of the point P5 
is taken equal to that of the point P54,0r equivalently, the spacing 
between Pj and P55 is set to 8 pixels on the reduced patch I5. Ina 
like fashion, when the hatched area (c) is rearranged, the height of P55 
is taken qual to that of P234. 
6)Correlation is performed onthe rearranged image pair I» for all the grid 
points except for occluding points (P35). Such occluding points are 
excluded out of windows for median-filtering as well. 
The third step: 
7) Repetition of the above processes. 
8) After the entire procedure is over, the grid points included in the 
margin are discarded. The discarded width of margins in x-direction 
should be equal to or larger than maximum occlusion width plus the 
window width for the median-filter,while in y-direction ‚since 
coincidence of phases is ensured, discarding of less width of margins 
might be allowed. Hence 6 and 4 points are discarded from both sides in 
x- and y-direction. In consequence only 12x16 points are used for 
plotting in a patch pair. 
Note 1: This algorithm is constructed on the two assumptions that the 
occluding areas are small enough compared to the entire region, and 
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