import imageio.v2 as imageio
import scipy.ndimage as ndi

im=imageio.imread('foot-xray.jpg')

weights = [[.11,  .11, .11],
           [.11,  .12, .11],
           [.11,  .11, .11]]

im_filt = ndi.convolve(im, weights)

fig, axes = plt.subplots(2, 1)
axes[0].imshow(im, cmap='gray')
axes[1].imshow(im_filt,cmap='gray')
plt.imshow()