Common Structure Mining of 3D Model Assembly Model Based on Frequent Subgraphs

Algorithm 1

Preprocessing algorithm.

	Input: and .
	Output: .
	Step 1. Begin
	Step 2. ,
	Step 3. while and do//A graph in a loop Atlas
	Step 4.  While and do//Semantic nodes in a loop graph
	Step 5.   if then
	Step 6.    remove , //Remove the relevant nodes whose frequency is less than the threshold
	Step 7.   end if
	Step 8.
	Step 9.  end while
	Step 10.
	Step 11.  end while
	Step 12.  return //Extract the preprocessed Atlas
	Step 13.  End