系统：ubuntu16.04
image = cv2.imread('./images/example_03.png')
cv2.imshow("Original", image)
cv2.waitKey(0)
解决方案：
import os
import cv2
PROJECT_ROOT = os.path.dirname(os.path.realpath(__file__))
data_path = os.path.join(PROJECT_ROOT, "images/example_03.png")
image = cv2.imread(data_path)
cv2.imshow("Original", image)
cv2.waitKey(0)
