Protocol for Quantification of Defects in Natural Fibres for Composites

Algorithm 2

Otsu’s method for defect area.

= 0                             Initial values

= 0

= 0

= 0

=                 Overall mean based on histogram

for    do

  for    do

    for    do

        =                    Weight of the first segment

        =                Weight of the second segment

        =                    Weight of the third segment

        =                 Weight of the fourth segment

        =                  Mean of the first segment

        =                Mean of the second segment

        =                 Mean of the third segment

        =                Mean of the fourth segment

                   Between-class variance

       if    then    Storing threshold combination for largest

          =

          =

          =

          =

       end if

    end for

  end for

end for