Solution:
import numpy as np
from PIL import Image
with open('/media/yuxijin/dataset/videos/content/mountain_2/flow/reliable_9_10.txt', 'r') as f:
data = f.readlines()
header = list(map(int, data[0].split(' ')))
w = header[0]
h = header[1]
vals = np.zeros((h, w), dtype=np.float32)
for i in range(1, len(data)):
line = data[i].rstrip().split(' ')
vals[i - 1] = np.array(list(map(np.float32, line)))
img = Image.fromarray(vals)
if img.mode != 'RGB': # pay attention to this line
img = img.convert('RGB') # also this line
img.save('test.jpg')
Before saving the array, you have to check whether its mode is ‘RGB’ or not. If not, convert it to the ‘RGB’ mode. Then save it.
Reference blog: PIL cannot write mode F to jpeg
