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The matching results of the HEVM method for the 5 best — criteria. While for the 1.5 pixel limit 4 points were 
tie-point candidates (see Figure 4, right) are shown in successfully correlated, only 2 tie-points were accepted in 
Figure 7 for both the 1- and 1.5-pixel backward matching case of the 1 pixel limit. 
  
  
  
  
  
  
  
  
Figure 5: Reference image (left) and search image (right) for tie-point matching. 
  
  
  
  
  
  
  
  
  
Figure 6: Masks of areas exceeding a backmatching limit of 1.5 pixels (left) and 1 pixel (right). 
  
  
  
  
  
  
Figure 7: Matching results for tie-point candidates for backmatching limits of 1.5 pixels (left) and 1 pixel (right). 
319 
International Archives of Photogrammetry and Remote Sensing. Vol. XXXI, Part B2. Vienna 1996