Gaussian Convolution, Blurring using Python

import matplotlib.pyplot as plt
import numpy as np
import scipy.signal as signal

def gauss_kern():
   """ Returns a normalized 2D gauss kernel array for convolutions """
   h1 = 15
   h2 = 15
   x, y = np.mgrid[0:h2, 0:h1]
   x = x-h2/2
   y = y-h1/2
   sigma = 1.5
   g = np.exp( -( x**2 + y**2 ) / (2*sigma**2) );
   return g / g.sum()

Img = plt.imread("twoObj.bmp")
Img = Img[::-1]
g = gauss_kern()
Img_smooth = signal.convolve(Img,g,mode='same')
plt.imshow(Img_smooth)
plt.show()

Results:

Before Image



After Image