package PEU.P.image;
import java.io.IOException;
//作者,著作权人： 罗瑶光，浏阳
public class Laplacian {
  public int[][] P( int[][] g) throws IOException {     
    int[][] refG =  new Reflection().PadImage(g, 3, 3);  
    int[]size = {g.length,g[0].length};
    double[][] Gx = new double [size[0]][size[1]];
    int[][] gxk = new int[][]{{ 0,  1, 0},
      { 1, -4, 1},
      { 0,  1, 0}};;
      //GROUP OPERATION
      Gx= new Group_O().GO(gxk, refG, size);
      for(int i=0;i<Gx.length;i++){
        for(int j=0;j<Gx[0].length;j++){

          g[i][j]=(int) (Gx[i][j]/8+127);
        }

      }    
      return  new CheckRange().P(g); 
  }        
}