Key-Skeleton-Pattern Mining on 3D Skeletons Represented by Lie Group for Action Recognition

Algorithm 3

Informative skeleton sequence ().

Input: key-skeleton-pattern dataset , mining sequence dataset of all actions

Output: The dataset of the most informative skeleton sequences

(1)  Obtaining training dataset from

(2)  ;

(3)  for the dataset of each action class U do

(4)   T is the table that includes all symbols in

(5)   for each symbol  do

(6)    if  and  then

(7)     

(8)     append to K

(9)     MinP-PrefixSpan()

(10)   end if

(11)  end for

(12) end for

(13) for each element  do

(14)  for each key-skeleton-pattern   do

(15)   if m is a subsequence of d.L then

(16)    

(17)    

(18)    for  do

(19)     

(20)    end for

(21)   end if

(22)  end for

(23)  for z=1 to Len(d.L) do

(24)   if patternpos[i]==1 then

(25)    append d.LA[z] to s

(26)   end if

(27)  end for

(28)  Append s to

(29) end for

(30) return