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Table 7 Rate of Undetermined images under the given cropping portion.

From: Screenshot identification by analysis of directional inequality of interlaced video

  Cropping portion
  1/2 1/8 1/32 1/128 1/512
Source      
   NS 0.97 1.87 3.74 8.58 19.50
   CS 0.75 1.67 3.67 8.60 19.06
  1. (unit: %)