import cv2
import numpy as np
import matplotlib.pyplot as plt

image=cv2.imread('photo.jpeg',0)
if image is None:
    print("Image not found")
    exit()

low=100
high=180
sliced=image.copy()
sliced[(image>=low)&(image<=high)]=255

plt.figure(figsize=(8,4))
plt.subplot(1,2,1)
plt.title("Original Image")
plt.imshow(image,cmap='gray')
plt.axis('off')
plt.subplot(1,2,2)
plt.title("Intensity Sliced Image")
plt.imshow(sliced,cmap='gray')
plt.axis('off')
plt.show()