Erase the image of the object on the right side and below by the window 3 × 3 marked the pixels of the object. Or spot with a value of "1" and assigned points such as P1 and then check the following:
a) the sum of the pixels of the P1 object is surrounded by an amount ranging from 2-6 points.
b) count the number of times that has changed from "0" to "1", the point P1 in the dark watches, which will be the times of change happens one time
c) points P2, P4 and P6. It must be the result of a logical AND is "0"
D) points P4, P6 and P8 has to be a result of the AND logic of "0".
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