How to display the code of an image after tf.decode_image

Question

I'm trying to see how the tf decode images so I try

import tensorflow as tf
image1 = tf.image.decode_png('/usr/src/pycharm-2017.1/bin/pycharm.png')
print(image1.shape)
with tf.Session() as sess:
    img = sess.run(image1)
    print(img.shape, img)

but it raise the error

InvalidArgumentError (see above for traceback): Invalid PNG header, data size 39
 [[Node: DecodePng = DecodePng[channels=0, dtype=DT_UINT8, _device="/job:localhost/replica:0/task:0/cpu:0"](DecodePng/contents)]]

Also I've tried tf.image.decode_image, but it didn't work either. What's wrong ? How can I fix it? Thank u

Answer 1

tf.image.decode_png accepts a Tensor of type string, so you need to read the png with Tensorflow before passing it to the function:

import tensorflow as tf
image1 = tf.image.decode_png(tf.read_file('/usr/src/pycharm-2017.1/bin/pycharm.png'))
print(image1.shape)
with tf.Session() as sess:
    img = sess.run(image1)
    print(img.shape, img)