tensorflow_quirks.py

img_url = '/home/play/data/GOD_DATASET/open_datasets/cityscapes/gtFine_trainvaltest/gtFine/train/aachen/aachen_000000_000019_gtFine_color.png'
# img_url = '/home/play/data/GOD_DATASET/open_datasets/mapillary/mapillary-vistas-dataset_public_v1.0/training/instances/QOJJHmXYAiRVW3rDK3gs0g.png'

import cv2
import skimage.io
import numpy as np

img = cv2.imread(img_url,cv2.IMREAD_UNCHANGED)
print ('\nCV2 : ', np.unique(img))

img = skimage.io.imread(img_url)
print ('\nskimage : ', np.unique(img))

import tensorflow as tf
os.environ['TF_CPP_MIN_LOG_LEVEL'] = '3' 
img = tf.image.decode_png(tf.read_file(img_url), channels=1)
with tf.Session() as sess:
  img = sess.run([img])
  print ('\ntensorflow : ', np.unique(img))