; . ; ati ; i aks ; c Inte 
International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, Vol XXXV, Part B5. Istanbul 2004 — 
  
  
  
  
(a) (b) (c) (d) 
Figure 3: Background estimation results of different algorithms and varying sequence length. The top row shows 4 images from a 
sub-sequence of 32 frames. Images (a) and (b) show the result of averaging over 4 and 32 of the sequence. Images (c) and (d) show the 
results using a commercial implementation of a state-of-the-art background estimator, again using 4 and 32 images. 
  
  
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Figure 6: Four images from a fixed viewpoint of a façade imaged from across a busy street. Traffic and pedestrians partially occlude 
the lower portion of the façade.