import matplotlib.pyplot as plt; 
import tensorflow as tf; 
 
image_raw_data_jpg = tf.gfile.FastGFile('11.jpg', 'r').read() 
image_raw_data_png = tf.gfile.FastGFile('1.png', 'r').read() 
 
with tf.Session() as sess: 
  img_data_jpg = tf.image.decode_jpeg(image_raw_data_jpg) #图像解码 
  img_data_jpg = tf.image.convert_image_dtype(img_data_jpg, dtype=tf.uint8) #改变图像数据的类型 
 
  img_data_png = tf.image.decode_png(image_raw_data_png) 
  img_data_png = tf.image.convert_image_dtype(img_data_png, dtype=tf.uint8) 
 
  plt.figure(1) #图像显示 
  plt.imshow(img_data_jpg.eval()) 
  plt.figure(2) 
  plt.imshow(img_data_png.eval()) 
  plt.show()