Python - High Boost

from skimage import data

from skimage.filters import unsharp_mask

import matplotlib.pyplot as plt

import cv2

import numpy as np

img = cv2.imread('A.jpg')

a = 1

kernel = np.array([[0,-1,0],[-1,4+a,-1],[0,-1,0]])

print (kernel)

img1 = cv2.filter2D(img,-1,kernel)

plt.imshow(img1[...,::-1])

Con el otro kernel

from skimage import data

from skimage.filters import unsharp_mask

import matplotlib.pyplot as plt

import cv2

import numpy as np

img = cv2.imread('A.jpg')

a = 1

kernel = np.array([[-1,-1,-1],[-1,8+a,-1],[-1,-1,-1]])

print (kernel)

img1 = cv2.filter2D(img,-1,kernel)

plt.imshow(img1[...,::-1])