Tensorflow error using my own data

Question

I've been playing with the Tensorflow library doing the tutorials. Now I wanted to play with my own data, but I fail horribly. This is perhaps a noob question but I can't figure it out.

I'm using this example: https://github.com/aymericdamien/TensorFlow-Examples/blob/master/examples/3%20-%20Neural%20Networks/convolutional_network.py

I want to use my own images, for converting my images to use with tensorflow i'm using this: https://github.com/HamedMP/ImageFlow/blob/master/ImageFlow.py

Now I change the parameters in the example from this:

 n_input = 784
 n_classes = 10

to this:

 n_input = 9216
 n_classes = 2

I did that because my images are 96 * 96 and there are only 2 classes of my images

I also change the weights and biases to the numbers I need.

I read the data like this:

batch_xs = imgReader.read_images(pathname);

imgReader being the ImageFlow file

but when I try to run it I gives me an error:

 ValueError: Cannot feed value of shape (104, 96, 96, 1) for Tensor
 u'Placeholder:0', which has shape (Dimension(None), Dimension(9216))

I feel like i'm overlooking something small but I don't see it.

mrry · Accepted Answer · 2015-11-28 17:40:05Z

17

This error arises because the shape of the data that you're trying to feed (104 x 96 x 96 x 1) does not match the shape of the input placeholder (batch_size x 9216, where batch_size may be variable).

To make it work, add the following line before running a training step:

batch_xs = np.reshape(batch_xs, (-1, 9216))

This uses numpy to reshape the images read in, which are 4-D arrays of batch_size x h x w x channels, into a batch_size x 9216 element matrix as expected by the placeholder.

answered Nov 28, 2015 at 17:40

mrry

126k27 gold badges404 silver badges401 bronze badges

Sign up to request clarification or add additional context in comments.

2 Comments

mrry Over a year ago

Glad it worked! Some of the shape stuff can be quite subtle, so we'll try to work on the error messages.

Mad Wombat Over a year ago

By the way, can make reshaping part of your graph with tf.reshape()

BSMP · Accepted Answer · 2017-09-13 01:43:12Z

0

I solved this problem by upgrading tensorflow through pip.

edited Sep 13, 2017 at 1:43

BSMP

4,9008 gold badges36 silver badges46 bronze badges

answered Nov 30, 2016 at 18:51

bobo32

1,0022 gold badges10 silver badges21 bronze badges

Collectives™ on Stack Overflow

Tensorflow error using my own data

2 Answers 2

2 Comments

Comments

Your Answer

Linked

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

2 Comments

Comments

Your Answer

Sign up or log in

Post as a guest

Linked

Related