M8CCC of Fig. 5b is S568348587081858791838708128348565838
128328183 and the number of “8” in this chain code is 16.
The fruit number of this region is 4 according to equation (3).
We found that the impact caused by the leaves shelter
was not obvious because the divisor 4 was equivalent to a
noise filter. Study suggested that the leaves shelter produced
inflection point meanwhile it still effaced some inflection
point.