ISPRS Commission III, Vol.34, Part 3A „Photogrammetric Computer Vision“, Graz, 2002 
  
   
   
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Fig. 5. Binocular image pair 
Several computer experiments have been carried out in order to 
choose proper parameters of the algorithm. It turned out that the 
number w in (17) should have a size between 5 and 10 (but of 
course, that value depends on the structure of the image) 
whereas the best values of parameters o; and o5 of equation 
(18) seem to be in the vicinity of & = o» - |. But these 
investigations are only preliminary. It is also not clear which the 
best law of the external forces (19) — (21) is. 
Red-green overlays of left images (red) and right edge images 
(green) showing the inherent disparities and the quality of edge 
matching, respectively, are presented in figures 6 and 7. Finally, 
figure 8 shows the disparity image. The result shows that in 
most image points good matching was achieved. But it shows 
also that there are left some mismatches resulting in wrong 
disparities. 
  
Fig. 7. Overlay of left images and right edge images 
(image pair after 20 iterations) 
  
— 5—— T — án Fig. 8. Disparity map 
Fig. 6. Overlay of left images and right edge images 
(original image pair) 
A - 179