Black image when displaying an image

'exec(%matplotlib inline)'
import numpy as np
import matplotlib.pyplot as plt
from PIL import Image
import pandas as pd
x_data = pd.read_csv('olivetti_X.csv');a = []
for i in range(len(x_data)):
  X = np.array(x_data.iloc[i])
  x = X.reshape(64,64)
  plt.imshow(Image.fromarray(x), cmap = plt.get_cmap('gray'))
  plt.show()

I can't understand why images are not output from the dataset, please help me understand

 0
python
Author: z1rT, 2020-02-27
Source

1 answers

Try to bring the values to the range 0-255:

X = (X * 255).astype(np.uint8)
 1
Author: gil9red, 2020-02-27 10:39:49