chapter 5 working with images page 161

[zmc1021]

I downloaded the code of ch5's test-input-image.jpg and tried to replicate the results shown at the bottom of the page, array([[[..., but I couldn't get it run.
import tensorflow as tf
import numpy as np
import Image
sess = tf.Session()
image_filename = "test-input-image.jpg"

loaded the image directly in the folder of the script

display images in python

img = Image.open(image_filename)

img.show()

display images in python

print image_filename
filename_queue = tf.train.string_input_producer(tf.train.match_filenames_once(image_filename))
print filename_queue
image_reader = tf.WholeFileReader()
key,image_file = image_reader.read(filename_queue)
print key
print image_file
image = tf.image.decode_jpeg(image_file)
print image
sess.run(tf.global_variables_initializer())
sess.run(image)
print(sess.run(image))
and the results are
<tensorflow.python.ops.data_flow_ops.FIFOQueue object at 0x7f555b882110>
Tensor("ReaderRead:0", shape=(), dtype=string)
Tensor("ReaderRead:1", shape=(), dtype=string)
Tensor("DecodeJpeg:0", shape=(?, ?, ?), dtype=uint8)

Clearly, the image was not read in properly, otherwise why shape=(?,?,?) after decode_jpeg. I also used the python code to display the input at the beginening to make sure the jpeg image was correctly read in, which is true.
I would appreciate it if someone could provide some insights what the problem could be.
Thanks in advance for your time.