They can be. The data set starts out as a list of {X, Y, Z} points that represents a square image. I then partition the data to have the {x, y} points that pass my filters.

Thanks Rohit. That is pretty impressive. I appreciate the help.

Best

Hi Rohit,

Table is listed below. Note that this is a subset of an array that has {x, y, z} coordinates. Here I've just added the x,y coordinates for simplicity. Also, note that (0,0) is an artificial point that I used to clean up the points the fall in between the groups.

{{0, 0}, {1, 4}, {1, 8}, {1, 9}, {1, 10}, {1, 11}, {1, 12}, {1, 
  16}, {1, 17}, {1, 18}, {2, 10}, {2, 11}, {2, 12}, {2, 16}, {2, 
  17}, {2, 18}, {3, 1}, {3, 11}, {3, 12}, {3, 13}, {3, 16}, {3, 
  17}, {3, 18}, {3, 19}, {3, 20}, {3, 21}, {4, 1}, {4, 2}, {4, 6}, {4,
   7}, {4, 13}, {4, 17}, {4, 18}, {4, 19}, {4, 20}, {4, 21}, {5, 
  1}, {5, 2}, {5, 3}, {5, 6}, {5, 7}, {5, 8}, {5, 19}, {5, 20}, {5, 
  21}, {6, 1}, {6, 2}, {6, 3}, {6, 6}, {6, 7}, {6, 8}, {6, 9}, {6, 
  10}, {6, 14}, {6, 21}, {7, 1}, {7, 2}, {7, 3}, {7, 7}, {7, 8}, {7, 
  9}, {7, 10}, {7, 11}, {7, 14}, {7, 15}, {7, 16}, {8, 3}, {8, 8}, {8,
   9}, {8, 10}, {8, 11}, {8, 14}, {8, 15}, {8, 16}, {8, 17}, {8, 
  18}, {9, 10}, {9, 11}, {9, 14}, {9, 15}, {9, 16}, {9, 17}, {9, 
  18}, {9, 19}, {9, 20}, {9, 21}, {10, 5}, {10, 11}, {10, 16}, {10, 
  17}, {10, 18}, {10, 19}, {10, 20}, {10, 21}, {11, 1}, {11, 5}, {11, 
  6}, {11, 7}, {11, 18}, {11, 19}, {11, 20}, {11, 21}, {12, 1}, {12, 
  2}, {12, 5}, {12, 6}, {12, 7}, {12, 8}, {12, 13}, {12, 19}, {12, 
  20}, {12, 21}, {13, 1}, {13, 2}, {13, 5}, {13, 6}, {13, 7}, {13, 
  8}, {13, 9}, {13, 13}, {13, 14}, {13, 15}, {14, 1}, {14, 2}, {14, 
  5}, {14, 6}, {14, 7}, {14, 8}, {14, 9}, {14, 10}, {14, 13}, {14, 
  14}, {14, 15}, {14, 16}, {15, 1}, {15, 2}, {15, 7}, {15, 8}, {15, 
  9}, {15, 10}, {15, 13}, {15, 14}, {15, 15}, {15, 16}, {15, 17}, {15,
   18}, {15, 21}, {16, 1}, {16, 2}, {16, 8}, {16, 9}, {16, 10}, {16, 
  13}, {16, 14}, {16, 15}, {16, 16}, {16, 17}, {16, 18}, {16, 
  21}, {17, 1}, {17, 2}, {17, 9}, {17, 10}, {17, 15}, {17, 16}, {17, 
  17}, {17, 18}, {17, 21}, {18, 5}, {18, 16}, {18, 17}, {18, 18}, {19,
   5}, {19, 6}, {19, 12}, {19, 17}, {19, 18}, {20, 5}, {20, 6}, {20, 
  7}, {20, 8}, {20, 12}, {20, 13}, {21, 1}, {21, 5}, {21, 6}, {21, 
  7}, {21, 8}, {21, 9}, {21, 12}, {21, 13}, {21, 14}, {21, 20}, {21, 
  21}}