Kernel "DoG" of size 3x3+1+1 with values from -0.155615 to 1
Forming a output range from -1 to 1 (Zero-Summing)
 0: -0.0943852 -0.155615 -0.0943852
 1: -0.155615         1 -0.155615
 2: -0.0943852 -0.155615 -0.0943852