If it is greater than 50, to examine the other conditions to make up the total pixels, white is less than equal to 15 if it is in the two conditions, the count increments by one.
If more than 50 to detect other conditions that require a total value of less than or equal to 15 white pixels if the two criteria to make this one count increments.
If more than 50 to investigate another one condition to give white pixel sum less than equal to 15 if in terms of two conditions to increase the count by one.