from skimage.color import rgb2gray
import matplotlib.pyplot as plt
from skimage.io import imread
from skimage.filters import threshold_sauvola 
import numpy as np
from skimage.exposure import is_low_contrast
from skimage.exposure import adjust_gamma
from skimage import exposure
from skimage.color import rgb2hsv

cimage = imread('/home/wolf/Documents/datasets/text/Images/Train/img406.jpg') 
img = rgb2gray(cimage)
plt.figure(figsize=(20,20))
plt.imshow(img, cmap="gray")